Source: https://aidb.si/d/us-senate-party-division-changes — U.S. Senate Historical Office, “Party Division,” https://www.senate.gov
| Row | Congress | Session | Session no. | Session start | Session end | As of | Change no. | Party 1 | Party 1 seats | Party 2 | Party 2 seats | Other seats | Other parties | Vacant | Total seats |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1-1st-session-0 | 1 | 1st session | 1 | 1789-03-04 | 1789-09-29 | 1789-03-04 | 0 | Pro-Admin | 15 | Anti-Admin | 7 | 0 | 0 | 22 | |
| 1-2nd-session-0 | 1 | 2nd session | 2 | 1790-01-04 | 1790-08-12 | 1790-01-04 | 0 | Pro-Admin | 19 | Anti-Admin | 7 | 0 | 0 | 26 | |
| 1-3rd-session-0 | 1 | 3rd session | 3 | 1790-12-06 | 1791-03-03 | 1790-12-06 | 0 | Pro-Admin | 18 | Anti-Admin | 8 | 0 | 0 | 26 | |
| 2-executive-session-0 | 2 | Executive session | 1791-03-04 | 1791-03-04 | 0 | Pro-Admin | 16 | Anti-Admin | 9 | 0 | 1 | 26 | |||
| 2-1st-session-0 | 2 | 1st session | 1 | 1791-10-24 | 1792-05-08 | 1791-10-24 | 0 | Pro-Admi | 16 | Anti-Admin | 11 | 0 | 1 | 28 | |
| 2-2nd-session-0 | 2 | 2nd session | 2 | 1792-11-05 | 1793-03-03 | 1792-11-05 | 0 | Pro-Admin | 16 | Anti-Admin | 13 | 0 | 1 | 30 | |
| 3-executive-session-0 | 3 | Executive session | 1793-03-04 | 1793-03-04 | 0 | Pro-Admin | 16 | Anti-Admin | 13 | 0 | 1 | 30 | |||
| 3-1st-session-0 | 3 | 1st session | 1 | 1793-12-02 | 1794-06-09 | 1793-12-02 | 0 | Pro-Admin | 15 | Anti-Admin | 13 | 0 | 2 | 30 | |
| 3-1st-session-1 | 3 | 1st session | 1 | 1793-12-02 | 1794-06-09 | 1794-04-24 | 1 | Pro-Admin | 16 | Anti-Admin | 13 | 0 | 1 | 30 | |
| 3-1st-session-2 | 3 | 1st session | 1 | 1793-12-02 | 1794-06-09 | 1794-05-11 | 2 | Pro-Admin | 16 | Anti-Admin | 12 | 0 | 2 | 30 | |
| 3-1st-session-3 | 3 | 1st session | 1 | 1793-12-02 | 1794-06-09 | 1794-05-24 | 3 | Pro-Admin | 16 | Anti-Admin | 11 | 0 | 3 | 30 | |
| 3-2nd-session-0 | 3 | 2nd session | 2 | 1794-11-03 | 1795-03-03 | 1794-11-03 | 0 | Pro-Admin | 16 | Anti-Admin | 11 | 0 | 3 | 30 | |
| 3-2nd-session-1 | 3 | 2nd session | 2 | 1794-11-03 | 1795-03-03 | 1794-12-29 | 1 | Pro-Admin | 16 | Anti-Admin | 12 | 0 | 2 | 30 | |
| 3-2nd-session-2 | 3 | 2nd session | 2 | 1794-11-03 | 1795-03-03 | 1795-02-07 | 2 | Pro-Admin | 17 | Anti-Admin | 12 | 0 | 1 | 30 | |
| 4-special-executive-session-0 | 4 | Special Executive session | 1795-06-08 | 1795-06-26 | 1795-06-08 | 0 | Federalists | 20 | Democratic Republicans | 10 | 0 | 0 | 30 | ||
| 4-1st-session-0 | 4 | 1st session | 1 | 1795-12-07 | 1796-06-01 | 1795-12-07 | 0 | Federalists | 21 | Democratic Republicans | 9 | 0 | 0 | 30 | |
| 4-1st-session-1 | 4 | 1st session | 1 | 1795-12-07 | 1796-06-01 | 1796-03-08 | 1 | Federalists | 20 | Democratic Republicans | 9 | 0 | 1 | 30 | |
| 4-1st-session-2 | 4 | 1st session | 1 | 1795-12-07 | 1796-06-01 | 1796-04-12 | 2 | Federalists | 20 | Democratic Republicans | 10 | 0 | 0 | 30 | |
| 4-2nd-session-0 | 4 | 2nd session | 2 | 1796-12-05 | 1797-03-03 | 1796-12-05 | 0 | Federalists | 21 | Democratic Republicans | 11 | 0 | 0 | 32 | |
| 5-special-session-0 | 5 | Special session | 1797-03-04 | 1797-03-04 | 0 | Federalists | 22 | Democratic Republicans | 10 | 0 | 0 | 32 | |||
| 5-1st-session-0 | 5 | 1st session | 1 | 1797-05-15 | 1797-07-10 | 1797-05-15 | 0 | Federalists | 22 | Democratic Republicans | 10 | 0 | 0 | 32 | |
| 5-2nd-session-0 | 5 | 2nd session | 2 | 1797-11-13 | 1798-07-16 | 1797-11-13 | 0 | Federalists | 22 | Democratic Republicans | 10 | 0 | 0 | 32 | |
| 5-3rd-session-0 | 5 | 3rd session | 3 | 1798-12-03 | 1799-03-03 | 1798-12-03 | 0 | Federalists | 22 | Democratic Republicans | 10 | 0 | 0 | 32 | |
| 6-1st-session-0 | 6 | 1st session | 1 | 1799-12-02 | 1800-05-14 | 1799-12-02 | 0 | Federalists | 22 | Democratic Republicans | 10 | 0 | 0 | 32 | |
| 6-2nd-session-0 | 6 | 2nd session | 2 | 1800-11-17 | 1801-03-03 | 1800-11-17 | 0 | Federalists | 21 | Democratic Republicans | 10 | 0 | 1 | 32 | |
| 6-2nd-session-1 | 6 | 2nd session | 2 | 1800-11-17 | 1801-03-03 | 1801-01-08 | 1 | Federalists | 21 | Democratic Republicans | 11 | 0 | 0 | 32 | |
| 7-special-session-0 | 7 | Special session | 1801-03-04 | 1801-03-05 | 1801-03-04 | 0 | Democratic Republicans | 15 | Federalists | 17 | 0 | 0 | 32 | ||
| 7-1st-session-0 | 7 | 1st session | 1 | 1801-12-07 | 1802-05-03 | 1801-12-07 | 0 | Democratic Republicans | 18 | Federalists | 14 | 0 | 0 | 32 | |
| 7-2nd-session-0 | 7 | 2nd session | 2 | 1802-12-06 | 1803-03-03 | 1802-12-06 | 0 | Democratic Republicans | 18 | Federalists | 14 | 0 | 0 | 32 | |
| 8-1st-session-0 | 8 | 1st session | 1 | 1803-10-17 | 1804-03-27 | 1803-10-17 | 0 | Democratic Republicans | 25 | Federalists | 9 | 0 | 0 | 34 | |
| 8-2nd-session-0 | 8 | 2nd session | 2 | 1804-11-05 | 1805-03-03 | 1804-11-05 | 0 | Democratic Republicans | 25 | Federalists | 9 | 0 | 0 | 34 | |
| 9-1st-session-0 | 9 | 1st session | 1 | 1805-12-02 | 1806-04-21 | 1805-12-02 | 0 | Democratic Republicans | 27 | Federalists | 7 | 0 | 0 | 34 | |
| 9-2nd-session-0 | 9 | 2nd session | 2 | 1806-12-01 | 1807-03-03 | 1806-12-01 | 0 | Democratic Republicans | 27 | Federalists | 7 | 0 | 0 | 34 | |
| 10-1st-session-0 | 10 | 1st session | 1 | 1807-10-26 | 1808-04-25 | 1807-10-26 | 0 | Democratic Republicans | 28 | Federalists | 6 | 0 | 0 | 34 | |
| 10-2nd-session-0 | 10 | 2nd session | 2 | 1808-11-07 | 1809-03-03 | 1808-11-07 | 0 | Democratic Republicans | 28 | Federalists | 6 | 0 | 0 | 34 | |
| 11-special-session-0 | 11 | Special session | 1809-03-04 | 1809-03-07 | 1809-03-04 | 0 | Democratic Republicans | 26 | Federalists | 7 | 0 | 1 | 34 | ||
| 11-1st-extraordinary-session-0 | 11 | 1st (extraordinary) session | 1 | 1809-05-22 | 1809-06-28 | 1809-05-22 | 0 | Democratic Republicans | 27 | Federalists | 7 | 0 | 0 | 34 | |
| 11-2nd-session-0 | 11 | 2nd session | 2 | 1809-11-27 | 1810-05-01 | 1809-11-27 | 0 | Democratic Republicans | 27 | Federalists | 7 | 0 | 0 | 34 | |
| 11-3rd-session-0 | 11 | 3rd session | 3 | 1810-12-03 | 1811-03-03 | 1810-12-03 | 0 | Democratic Republicans | 27 | Federalists | 7 | 0 | 0 | 34 | |
| 12-1st-session-0 | 12 | 1st session | 1 | 1811-11-04 | 1812-07-06 | 1811-11-04 | 0 | Democratic Republicans | 28 | Federalists | 6 | 0 | 0 | 34 | |
| 12-2nd-session-0 | 12 | 2nd session | 2 | 1812-11-02 | 1813-03-03 | 1812-11-02 | 0 | Democratic Republicans | 30 | Federalists | 6 | 0 | 0 | 36 | |
| 13-first-session-0 | 13 | First session | 1813-05-24 | 1813-08-02 | 1813-05-24 | 0 | Democratic Republicans | 28 | Federalists | 8 | 0 | 0 | 36 | ||
| 13-first-session-1 | 13 | First session | 1813-05-24 | 1813-08-02 | 1813-06-21 | 1 | Democratic Republicans | 27 | Federalists | 9 | 0 | 0 | 36 | ||
| 13-2nd-session-0 | 13 | 2nd session | 2 | 1813-12-06 | 1814-04-18 | 1813-12-06 | 0 | Democratic Republicans | 27 | Federalists | 9 | 0 | 0 | 36 | |
| 13-3rd-session-0 | 13 | 3rd session | 3 | 1814-09-19 | 1815-03-03 | 1814-09-19 | 0 | Democratic Republicans | 26 | Federalists | 10 | 0 | 0 | 36 | |
| 13-3rd-session-1 | 13 | 3rd session | 3 | 1814-09-19 | 1815-03-03 | 1815-01-02 | 1 | Democratic Republicans | 25 | Federalists | 10 | 1 | 1 Anti-Democrat | 0 | 36 |
| 14-1st-session-0 | 14 | 1st session | 1 | 1815-12-04 | 1816-04-30 | 1815-12-04 | 0 | Democratic Republicans | 22 | Federalists | 11 | 1 | 1 Anti-Democratic | 2 | 36 |
| 14-1st-session-1 | 14 | 1st session | 1 | 1815-12-04 | 1816-04-30 | 1816-01-22 | 1 | Democratic Republicans | 23 | Federalists | 11 | 1 | 1 Anti-Democratic | 1 | 36 |
| 14-1st-session-2 | 14 | 1st session | 1 | 1815-12-04 | 1816-04-30 | 1816-02-05 | 2 | Democratic Republicans | 23 | Federalists | 12 | 1 | 1 Anti-Democratic | 0 | 36 |
| 14-2nd-session-0 | 14 | 2nd session | 2 | 1816-12-02 | 1817-03-03 | 1816-12-02 | 0 | Democratic Republicans | 24 | Federalists | 13 | 1 | 1 Anti-Democratic | 0 | 38 |
| 15-special-session-0 | 15 | Special session | 1817-03-04 | 1818-03-06 | 1817-03-04 | 0 | Democratic Republicans | 25 | Federalists | 13 | 0 | 0 | 38 | ||
| 15-1st-session-0 | 15 | 1st session | 1 | 1817-12-01 | 1818-04-20 | 1817-12-01 | 0 | Democratic Republicans | 27 | Federalists | 12 | 0 | 1 | 40 | |
| 15-1st-session-1 | 15 | 1st session | 1 | 1817-12-01 | 1818-04-20 | 1818-01-21 | 1 | Democratic Republicans | 26 | Federalists | 12 | 0 | 2 | 40 | |
| 15-1st-session-2 | 15 | 1st session | 1 | 1817-12-01 | 1818-04-20 | 1818-02-26 | 2 | Democratic Republicans | 27 | Federalists | 12 | 0 | 1 | 40 | |
| 15-2nd-session-0 | 15 | 2nd session | 2 | 1818-11-16 | 1819-03-03 | 1818-11-16 | 0 | Democratic Republicans | 28 | Federalists | 12 | 0 | 0 | 40 | |
| 15-2nd-session-1 | 15 | 2nd session | 2 | 1818-11-16 | 1819-03-03 | 1818-12-04 | 1 | Democratic Republicans | 30 | Federalists | 12 | 0 | 0 | 42 | |
| 16-1st-session-0 | 16 | 1st session | 1 | 1819-12-06 | 1820-05-15 | 1819-12-06 | 0 | Democratic Republicans | 33 | Federalists | 9 | 0 | 0 | 42 | |
| 16-1st-session-1 | 16 | 1st session | 1 | 1819-12-06 | 1820-05-15 | 1819-12-14 | 1 | Democratic Republicans | 35 | Federalists | 9 | 0 | 0 | 44 | |
| 16-2nd-session-0 | 16 | 2nd session | 2 | 1820-11-13 | 1821-03-03 | 1820-11-13 | 0 | Democratic Republicans | 37 | Federalists | 9 | 0 | 0 | 46 | |
| 16-2nd-session-1 | 16 | 2nd session | 2 | 1820-11-13 | 1821-03-03 | 1821-01-20 | 1 | Democratic Republicans | 38 | Federalists | 8 | 0 | 0 | 46 | |
| 17-1st-session-0 | 17 | 1st session | 1 | 1821-12-03 | 1822-05-08 | 1821-12-03 | 0 | Democratic Republicans | 43 | Federalists | 4 | 0 | 1 | 48 | |
| 17-1st-session-1 | 17 | 1st session | 1 | 1821-12-03 | 1822-05-08 | 1822-01-24 | 1 | Democratic Republicans | 44 | Federalists | 4 | 0 | 0 | 48 | |
| 17-1st-session-2 | 17 | 1st session | 1 | 1821-12-03 | 1822-05-08 | 1822-02-25 | 2 | Democratic Republicans | 43 | Federalists | 4 | 0 | 1 | 48 | |
| 17-2nd-session-0 | 17 | 2nd session | 2 | 1822-12-02 | 1823-03-03 | 1822-12-02 | 0 | Democratic Republicans | 43 | Federalists | 4 | 0 | 1 | 48 | |
| 18-1st-session-0 | 18 | 1st session | 1 | 1823-12-01 | 1824-05-27 | 1823-12-01 | 0 | Jackson & Crawford Republicans | 31 | Adams-Clay Republicans & Federalists | 16 | 0 | 1 | 48 | |
| 18-1st-session-1 | 18 | 1st session | 1 | 1823-12-01 | 1824-05-27 | 1823-12-10 | 1 | Jackson & Crawford Republicans | 31 | Adams-Clay Republicans & Federalists | 15 | 0 | 2 | 48 | |
| 18-1st-session-2 | 18 | 1st session | 1 | 1823-12-01 | 1824-05-27 | 1824-01-15 | 2 | Jackson & Crawford Republicans | 31 | Adams-Clay Republicans & Federalists | 16 | 0 | 1 | 48 | |
| 18-1st-session-3 | 18 | 1st session | 1 | 1823-12-01 | 1824-05-27 | 1824-03-04 | 3 | Jackson & Crawford Republicans | 31 | Adams-Clay Republicans & Federalists | 15 | 0 | 2 | 48 | |
| 18-1st-session-4 | 18 | 1st session | 1 | 1823-12-01 | 1824-05-27 | 1824-03-24 | 4 | Jackson & Crawford Republicans | 31 | Adams-Clay Republicans & Federalists | 16 | 0 | 1 | 48 | |
| 18-2nd-session-0 | 18 | 2nd session | 2 | 1824-12-06 | 1825-03-03 | 1824-12-06 | 0 | Jackson & Crawford Republicans | 32 | Adams-Clay Republicans & Federalists | 16 | 0 | 0 | 48 | |
| 19-special-session-0 | 19 | Special session | 1825-03-04 | 1825-03-09 | 1825-03-04 | 0 | Jacksonians | 27 | Adams | 20 | 0 | 1 | 48 | ||
| 19-1st-session-0 | 19 | 1st session | 1 | 1825-12-05 | 1826-05-22 | 1825-12-05 | 0 | Jacksonians | 26 | Adams | 21 | 0 | 1 | 48 | |
| 19-1st-session-1 | 19 | 1st session | 1 | 1825-12-05 | 1826-05-22 | 1826-01-31 | 1 | Jacksonians | 26 | Adams | 22 | 0 | 0 | 48 | |
| 19-1st-session-2 | 19 | 1st session | 1 | 1825-12-05 | 1826-05-22 | 1826-02-22 | 2 | Jacksonians | 25 | Adams | 23 | 0 | 0 | 48 | |
| 19-2nd-session-0 | 19 | 2nd session | 2 | 1826-12-04 | 1827-03-03 | 1826-12-04 | 0 | Jacksonians | 25 | Adams | 23 | 0 | 0 | 48 | |
| 19-2nd-session-1 | 19 | 2nd session | 2 | 1826-12-04 | 1827-03-03 | 1827-01-23 | 1 | Jacksonians | 26 | Adams | 22 | 0 | 0 | 48 | |
| 20-1st-session-0 | 20 | 1st session | 1 | 1827-12-03 | 1828-05-26 | 1827-12-03 | 0 | Jacksonians | 27 | Adams | 21 | 0 | 0 | 48 | |
| 20-2nd-session-0 | 20 | 2nd session | 2 | 1828-12-01 | 1829-03-03 | 1828-12-01 | 0 | Jacksonians | 26 | Adams | 21 | 0 | 1 | 48 | |
| 21-special-session-0 | 21 | Special session | 1829-03-04 | 1829-03-17 | 1829-03-04 | 0 | Jacksonians | 26 | Anti-Jacksonians | 22 | 0 | 0 | 48 | ||
| 21-1st-session-0 | 21 | 1st session | 1 | 1829-12-07 | 1830-05-31 | 1829-12-07 | 0 | Jacksonians | 24 | Anti-Jacksonians | 22 | 0 | 2 | 48 | |
| 21-1st-session-1 | 21 | 1st session | 1 | 1829-12-07 | 1830-05-31 | 1830-01-13 | 1 | Jacksonians | 24 | Anti-Jacksonians | 23 | 0 | 1 | 48 | |
| 21-1st-session-2 | 21 | 1st session | 1 | 1829-12-07 | 1830-05-31 | 1830-02-08 | 2 | Jacksonians | 25 | Anti-Jacksonians | 23 | 0 | 0 | 48 | |
| 21-2nd-session-0 | 21 | 2nd session | 2 | 1830-12-06 | 1831-03-03 | 1830-12-06 | 0 | Jacksonians | 25 | Anti-Jacksonians | 23 | 0 | 0 | 48 | |
| 22-1st-session-0 | 22 | 1st session | 1 | 1831-12-05 | 1832-07-16 | 1831-12-05 | 0 | Jacksonians | 24 | Anti-Jacksonians | 22 | 2 | 2 Nullifiers | 0 | 48 |
| 22-1st-session-1 | 22 | 1st session | 1 | 1831-12-05 | 1832-07-16 | 1832-01-03 | 1 | Jacksonians | 25 | Anti-Jacksonians | 21 | 2 | 2 Nullifiers | 0 | 48 |
| 22-2nd-session-0 | 22 | 2nd session | 2 | 1832-12-03 | 1833-03-02 | 1832-12-03 | 0 | Jacksonians | 25 | Anti-Jacksonians | 21 | 2 | 2 Nullifiers | 0 | 48 |
| 23-1st-session-0 | 23 | 1st session | 1 | 1833-12-02 | 1834-06-30 | 1833-12-02 | 0 | Anti-Jacksonians | 25 | Jacksonians | 20 | 2 | 2 Nullifiers | 1 | 48 |
| 23-1st-session-1 | 23 | 1st session | 1 | 1833-12-02 | 1834-06-30 | 1834-01-16 | 1 | Anti-Jacksonians | 26 | Jacksonians | 20 | 2 | 2 Nullifiers | 0 | 48 |
| 23-1st-session-2 | 23 | 1st session | 1 | 1833-12-02 | 1834-06-30 | 1834-03-05 | 2 | Anti-Jacksonians | 27 | Jacksonians | 19 | 2 | 2 Nullifiers | 0 | 48 |
| 23-2nd-session-0 | 23 | 2nd session | 2 | 1834-12-01 | 1835-03-03 | 1834-12-01 | 0 | Anti-Jacksonians | 27 | Jacksonians | 19 | 2 | 2 Nullifiers | 0 | 48 |
| 23-2nd-session-1 | 23 | 2nd session | 2 | 1834-12-01 | 1835-03-03 | 1835-02-06 | 1 | Anti-Jacksonians | 26 | Jacksonians | 20 | 2 | 2 Nullifiers | 0 | 48 |
| 24-1st-session-0 | 24 | 1st session | 1 | 1835-12-07 | 1836-07-04 | 1835-12-07 | 0 | Anti-Jacksonians | 22 | Jacksonians | 23 | 2 | 2 Nullifiers | 1 | 48 |
| 24-1st-session-1 | 24 | 1st session | 1 | 1835-12-07 | 1836-07-04 | 1836-02-29 | 1 | Anti-Jacksonians | 21 | Jacksonians | 23 | 2 | 2 Nullifiers | 2 | 48 |
| 24-1st-session-2 | 24 | 1st session | 1 | 1835-12-07 | 1836-07-04 | 1836-03-04 | 2 | Anti-Jacksonians | 21 | Jacksonians | 24 | 2 | 2 Nullifiers | 1 | 48 |
| 24-1st-session-3 | 24 | 1st session | 1 | 1835-12-07 | 1836-07-04 | 1836-03-14 | 3 | Anti-Jacksonians | 21 | Jacksonians | 25 | 2 | 2 Nullifiers | 0 | 48 |
| 24-2nd-session-0 | 24 | 2nd session | 2 | 1836-12-05 | 1837-03-03 | 1836-12-05 | 0 | Jacksonians | 27 | Anti-Jacksonians | 19 | 2 | 2 Nullifiers | 2 | 50 |
| 24-2nd-session-1 | 24 | 2nd session | 2 | 1836-12-05 | 1837-03-03 | 1836-12-15 | 1 | Jacksonians | 29 | Anti-Jacksonians | 19 | 2 | 2 Nullifiers | 0 | 50 |
| 24-2nd-session-2 | 24 | 2nd session | 2 | 1836-12-05 | 1837-03-03 | 1837-01-26 | 2 | Jacksonians | 31 | Anti-Jacksonians | 19 | 2 | 2 Nullifiers | 0 | 52 |
| 24-2nd-session-3 | 24 | 2nd session | 2 | 1836-12-05 | 1837-03-03 | 1837-02-02 | 3 | Jacksonians | 32 | Anti-Jacksonians | 18 | 2 | 2 Nullifiers | 0 | 52 |
| 25-special-session-0 | 25 | Special session | 1837-03-04 | 1837-03-10 | 1837-03-04 | 0 | Democrats | 35 | Whigs | 17 | 0 | 0 | 52 | ||
| 25-1st-session-0 | 25 | 1st session | 1 | 1837-09-04 | 1837-10-16 | 1837-09-04 | 0 | Democrats | 35 | Whigs | 17 | 0 | 0 | 52 | |
| 25-2nd-session-0 | 25 | 2nd session | 2 | 1837-12-04 | 1838-07-09 | 1837-12-04 | 0 | Democrats | 35 | Whigs | 17 | 0 | 0 | 52 | |
| 25-2nd-session-1 | 25 | 2nd session | 2 | 1837-12-04 | 1838-07-09 | 1838-02-19 | 1 | Democrats | 36 | Whigs | 16 | 0 | 0 | 52 | |
| 25-3rd-session-0 | 25 | 3rd session | 3 | 1838-12-03 | 1839-03-03 | 1838-12-03 | 0 | Democrats | 35 | Whigs | 17 | 0 | 0 | 52 | |
| 26-1st-session-0 | 26 | 1st session | 1 | 1839-12-02 | 1840-07-21 | 1839-12-02 | 0 | Democrats | 29 | Whigs | 19 | 0 | 4 | 52 | |
| 26-1st-session-1 | 26 | 1st session | 1 | 1839-12-02 | 1840-07-21 | 1840-01-16 | 1 | Democrats | 30 | Whigs | 19 | 0 | 3 | 52 | |
| 26-1st-session-2 | 26 | 1st session | 1 | 1839-12-02 | 1840-07-21 | 1840-02-07 | 2 | Democrats | 30 | Whigs | 20 | 0 | 2 | 52 | |
| 26-1st-session-3 | 26 | 1st session | 1 | 1839-12-02 | 1840-07-21 | 1840-02-26 | 3 | Democrats | 31 | Whigs | 19 | 0 | 2 | 52 | |
| 26-2nd-session-0 | 26 | 2nd session | 2 | 1840-12-07 | 1841-03-03 | 1840-12-07 | 0 | Democrats | 29 | Whigs | 21 | 0 | 2 | 52 | |
| 26-2nd-session-1 | 26 | 2nd session | 2 | 1840-12-07 | 1841-03-03 | 1841-01-19 | 1 | Democrats | 29 | Whigs | 22 | 0 | 1 | 52 | |
| 26-2nd-session-2 | 26 | 2nd session | 2 | 1840-12-07 | 1841-03-03 | 1841-01-30 | 2 | Democrats | 29 | Whigs | 23 | 0 | 0 | 52 | |
| 27-special-session-0 | 27 | Special session | 1841-03-04 | 1841-03-15 | 1841-03-04 | 0 | Whigs | 29 | Democrats | 22 | 0 | 1 | 52 | ||
| 27-1st-session-0 | 27 | 1st session | 1 | 1841-05-31 | 1841-09-13 | 1841-05-03 | 0 | Whigs | 29 | Democrats | 22 | 0 | 1 | 52 | |
| 27-2nd-session-0 | 27 | 2nd session | 2 | 1841-12-06 | 1842-08-31 | 1841-12-06 | 0 | Whigs | 29 | Democrats | 22 | 0 | 1 | 52 | |
| 27-2nd-session-1 | 27 | 2nd session | 2 | 1841-12-06 | 1842-08-31 | 1842-04-14 | 1 | Whigs | 30 | Democrats | 21 | 0 | 1 | 52 | |
| 27-3rd-session-0 | 27 | 3rd session | 3 | 1842-12-05 | 1843-03-03 | 1842-12-05 | 0 | Whigs | 29 | Democrats | 22 | 0 | 1 | 52 | |
| 28-1st-session-0 | 28 | 1st session | 1 | 1843-12-04 | 1844-06-17 | 1843-12-04 | 0 | Whigs | 28 | Democrats | 23 | 0 | 1 | 52 | |
| 28-1st-session-1 | 28 | 1st session | 1 | 1843-12-04 | 1844-06-17 | 1844-02-07 | 1 | Whigs | 27 | Democrats | 23 | 1 | 1 Law & Order | 1 | 52 |
| 28-1st-session-2 | 28 | 1st session | 1 | 1843-12-04 | 1844-06-17 | 1844-03-04 | 2 | Whigs | 28 | Democrats | 23 | 1 | 1 Law & Order | 0 | 52 |
| 28-2nd-session-0 | 28 | 2nd session | 2 | 1844-12-02 | 1845-03-03 | 1844-12-02 | 0 | Whigs | 27 | Democrats | 24 | 1 | 1 Law & Order | 0 | 52 |
| 29-special-session-0 | 29 | Special session | 1845-03-04 | 1845-03-20 | 1845-03-04 | 0 | Democrats | 26 | Whigs | 24 | 0 | 2 | 52 | ||
| 29-1st-session-0 | 29 | 1st session | 1 | 1845-12-01 | 1846-08-10 | 1845-12-01 | 0 | Democrats | 30 | Whigs | 24 | 0 | 0 | 54 | |
| 29-1st-session-1 | 29 | 1st session | 1 | 1845-12-01 | 1846-08-10 | 1846-03-30 | 1 | Democrats | 32 | Whigs | 24 | 0 | 0 | 56 | |
| 29-1st-session-2 | 29 | 1st session | 1 | 1845-12-01 | 1846-08-10 | 1846-06-22 | 2 | Democrats | 31 | Whigs | 24 | 1 | 1 Liberty | 0 | 56 |
| 29-2nd-session-0 | 29 | 2nd session | 2 | 1846-12-07 | 1847-03-03 | 1846-12-14 | 0 | Democrats | 30 | Whigs | 25 | 1 | 1 Liberty | 0 | 56 |
| 29-2nd-session-1 | 29 | 2nd session | 2 | 1846-12-07 | 1847-03-03 | 1847-02-03 | 1 | Democrats | 31 | Whigs | 24 | 1 | 1 Liberty | 0 | 56 |
| 30-1st-session-0 | 30 | 1st session | 1 | 1847-12-06 | 1848-08-14 | 1847-12-06 | 0 | Democrats | 34 | Whigs | 21 | 1 | 1 Independent Democrat | 0 | 56 |
| 30-1st-session-1 | 30 | 1st session | 1 | 1847-12-06 | 1848-08-14 | 1848-06-26 | 1 | Democrats | 36 | Whigs | 21 | 1 | 1 Independent Democrat | 0 | 58 |
| 30-2nd-session-0 | 30 | 2nd session | 2 | 1848-12-04 | 1849-03-03 | 1848-12-04 | 0 | Democrats | 36 | Whigs | 21 | 1 | 1 Independent Democrat | 0 | 58 |
| 30-2nd-session-1 | 30 | 2nd session | 2 | 1848-12-04 | 1849-03-03 | 1848-12-26 | 1 | Democrats | 38 | Whigs | 21 | 1 | 1 Independent Democrat | 0 | 60 |
| 31-special-session-0 | 31 | Special session | 1849-03-05 | 1849-03-23 | 1849-03-05 | 0 | Democrats | 33 | Whigs | 25 | 2 | 2 Free Soilers | 0 | 60 | |
| 31-1st-session-0 | 31 | 1st session | 1 | 1849-12-03 | 1850-09-30 | 1849-12-03 | 0 | Democrats | 33 | Whigs | 25 | 2 | 2 Free Soilers | 0 | 60 |
| 31-1st-session-1 | 31 | 1st session | 1 | 1849-12-03 | 1850-09-30 | 1850-09-10 | 1 | Democrats | 35 | Whigs | 25 | 2 | 2 Free Soilers | 0 | 62 |
| 31-2nd-session-0 | 31 | 2nd session | 2 | 1850-12-02 | 1851-03-03 | 1850-12-02 | 0 | Democrats | 35 | Whigs | 25 | 2 | 2 Free Soilers | 0 | 62 |
| 31-2nd-session-1 | 31 | 2nd session | 2 | 1850-12-02 | 1851-03-03 | 1851-02-07 | 1 | Democrats | 36 | Whigs | 24 | 2 | 2 Free Soilers | 0 | 62 |
| 32-special-session-0 | 32 | Special session | 1851-03-04 | 1851-03-13 | 1851-03-04 | 0 | Democrats | 34 | Whigs | 22 | 2 | 2 Free Soilers | 4 | 62 | |
| 32-1st-session-0 | 32 | 1st session | 1 | 1851-12-01 | 1852-08-31 | 1851-12-01 | 0 | Democrats | 34 | Whigs | 23 | 3 | 3 Free Soilers | 2 | 62 |
| 32-1st-session-1 | 32 | 1st session | 1 | 1851-12-01 | 1852-08-31 | 1852-03-11 | 1 | Democrats | 33 | Whigs | 24 | 3 | 3 Free Soilers | 2 | 62 |
| 32-1st-session-2 | 32 | 1st session | 1 | 1851-12-01 | 1852-08-31 | 1852-03-17 | 2 | Democrats | 34 | Whigs | 24 | 3 | 3 Free Soilers | 1 | 62 |
| 32-1st-session-3 | 32 | 1st session | 1 | 1851-12-01 | 1852-08-31 | 1852-05-14 | 3 | Democrats | 35 | Whigs | 24 | 3 | 3 Free Soilers | 0 | 62 |
| 32-1st-session-4 | 32 | 1st session | 1 | 1851-12-01 | 1852-08-31 | 1852-06-11 | 4 | Democrats | 36 | Whigs | 23 | 3 | 3 Free Soilers | 0 | 62 |
| 32-1st-session-5 | 32 | 1st session | 1 | 1851-12-01 | 1852-08-31 | 1852-07-15 | 5 | Democrats | 37 | Whigs | 22 | 3 | 3 Free Soilers | 0 | 62 |
| 32-2nd-session-0 | 32 | 2nd session | 2 | 1852-12-06 | 1853-03-03 | 1852-12-06 | 0 | Democrats | 36 | Whigs | 23 | 3 | 3 Free Soilers | 0 | 62 |
| 33-special-session-0 | 33 | Special session | 1853-03-04 | 1853-04-11 | 1853-03-04 | 0 | Democrats | 35 | Whigs | 21 | 2 | 2 Free Soilers | 4 | 62 | |
| 33-1st-session-0 | 33 | 1st session | 1 | 1853-12-05 | 1854-08-07 | 1853-12-05 | 0 | Democrats | 36 | Whigs | 21 | 2 | 2 Free Soilers | 3 | 62 |
| 33-1st-session-1 | 33 | 1st session | 1 | 1853-12-05 | 1854-08-07 | 1854-01-26 | 1 | Democrats | 37 | Whigs | 21 | 2 | 2 Free Soilers | 2 | 62 |
| 33-1st-session-2 | 33 | 1st session | 1 | 1853-12-05 | 1854-08-07 | 1854-02-23 | 2 | Democrats | 37 | Whigs | 22 | 2 | 2 Free Soilers | 1 | 62 |
| 33-1st-session-3 | 33 | 1st session | 1 | 1853-12-05 | 1854-08-07 | 1854-03-17 | 3 | Democrats | 37 | Whigs | 21 | 2 | 2 Free Soilers | 2 | 62 |
| 33-1st-session-4 | 33 | 1st session | 1 | 1853-12-05 | 1854-08-07 | 1854-05-25 | 4 | Democrats | 37 | Whigs | 20 | 3 | 3 Free Soilers | 2 | 62 |
| 33-2nd-session-0 | 33 | 2nd session | 2 | 1854-12-04 | 1855-03-03 | 1854-12-04 | 0 | Democrats | 37 | Whigs | 20 | 4 | 4 Free Soilers | 1 | 62 |
| 33-2nd-session-1 | 33 | 2nd session | 2 | 1854-12-04 | 1855-03-03 | 1855-02-10 | 1 | Democrats | 37 | Whigs | 19 | 5 | 4 Free Soilers, 1 American | 1 | 62 |
| 34-1st-session-0 | 34 | 1st session | 1 | 1855-12-03 | 1856-08-18 | 1855-12-03 | 0 | Democrats | 35 | Opposition | 22 | 1 | 1 American | 4 | 62 |
| 34-1st-session-1 | 34 | 1st session | 1 | 1855-12-03 | 1856-08-18 | 1856-01-28 | 1 | Democrats | 36 | Opposition | 22 | 1 | 1 American | 3 | 62 |
| 34-2nd-session-0 | 34 | 2nd session | 2 | 1856-08-21 | 1856-08-30 | 1856-08-21 | 0 | Democrats | 36 | Opposition | 22 | 1 | 1 American | 3 | 62 |
| 34-3rd-session-0 | 34 | 3rd session | 3 | 1856-12-01 | 1857-03-03 | 1856-12-01 | 0 | Democrats | 36 | Opposition | 22 | 1 | 1 American | 3 | 62 |
| 34-3rd-session-1 | 34 | 3rd session | 3 | 1856-12-01 | 1857-03-03 | 1857-01-29 | 1 | Democrats | 37 | Opposition | 20 | 3 | 1 American, 2 Republicans | 2 | 62 |
| 34-3rd-session-2 | 34 | 3rd session | 3 | 1856-12-01 | 1857-03-03 | 1857-02-09 | 2 | Democrats | 39 | Opposition | 20 | 3 | 1 American, 2 Republicans | 0 | 62 |
| 35-1st-special-session-0 | 35 | 1st special session | 1 | 1857-03-04 | 1857-03-14 | 1857-03-04 | 0 | Democrats | 36 | Republicans | 20 | 5 | 5 Americans | 1 | 62 |
| 35-1st-session-0 | 35 | 1st session | 1 | 1857-12-07 | 1858-06-14 | 1857-12-07 | 0 | Democrats | 37 | Republicans | 20 | 5 | 5 Americans | 0 | 62 |
| 35-1st-session-1 | 35 | 1st session | 1 | 1857-12-07 | 1858-06-14 | 1858-05-12 | 1 | Democrats | 39 | Republicans | 20 | 5 | 5 Americans | 0 | 64 |
| 35-2nd-special-session-0 | 35 | 2nd special session | 2 | 1858-06-15 | 1858-06-16 | 1858-06-15 | 0 | Democrats | 39 | Republicans | 20 | 5 | 5 Americans | 0 | 64 |
| 35-2nd-session-0 | 35 | 2nd session | 2 | 1858-12-06 | 1859-03-03 | 1858-12-06 | 0 | Democrats | 39 | Republicans | 20 | 5 | 5 Americans | 0 | 64 |
| 35-2nd-session-1 | 35 | 2nd session | 2 | 1858-12-06 | 1859-03-03 | 1859-02-14 | 1 | Democrats | 41 | Republicans | 20 | 5 | 5 Americans | 0 | 66 |
| 36-1st-special-session-0 | 36 | 1st special session | 1 | 1859-03-04 | 1859-03-10 | 1859-03-04 | 0 | Democrats | 38 | Republicans | 25 | 2 | 2 American | 1 | 66 |
| 36-1st-session-0 | 36 | 1st session | 1 | 1859-12-05 | 1860-06-25 | 1859-12-05 | 0 | Democrats | 38 | Republicans | 25 | 2 | 2 American | 1 | 66 |
| 36-2nd-special-session-0 | 36 | 2nd special session | 2 | 1860-06-26 | 1860-06-28 | 1860-06-26 | 0 | Democrats | 38 | Republicans | 25 | 2 | 2 American | 1 | 66 |
| 36-2nd-session-0 | 36 | 2nd session | 2 | 1860-12-03 | 1861-03-03 | 1860-12-03 | 0 | Democrats | 36 | Republicans | 26 | 2 | 2 American | 2 | 66 |
| 36-2nd-session-1 | 36 | 2nd session | 2 | 1860-12-03 | 1861-03-03 | 1861-02-04 | 1 | Democrats | 26 | Republicans | 26 | 2 | 2 American | 12 | 66 |
| 37-special-session-0 | 37 | Special session | 1861-03-04 | 1861-03-28 | 1861-03-04 | 0 | Republicans | 29 | Democrats | 22 | 1 | 1 Unionist | 14 | 66 | |
| 37-1st-session-0 | 37 | 1st session | 1 | 1861-07-04 | 1861-08-06 | 1861-07-04 | 0 | Republicans | 32 | Democrats | 14 | 3 | 3 Unionists | 19 | 68 |
| 37-2nd-session-0 | 37 | 2nd session | 2 | 1861-12-02 | 1862-07-17 | 1861-12-02 | 0 | Democrats | 30 | Republicans | 14 | 3 | 3 Unionists | 21 | 68 |
| 37-2nd-session-1 | 37 | 2nd session | 2 | 1861-12-02 | 1862-07-17 | 1862-06-02 | 1 | Democrats | 31 | Republicans | 10 | 7 | 7 Unionists | 20 | 68 |
| 37-3rd-session-0 | 37 | 3rd session | 3 | 1862-12-01 | 1863-03-03 | 1862-12-01 | 0 | Republicans | 32 | Democrats | 9 | 7 | 7 Unionists | 20 | 68 |
| 37-3rd-session-1 | 37 | 3rd session | 3 | 1862-12-01 | 1863-03-03 | 1863-01-30 | 1 | Republicans | 30 | Democrats | 11 | 7 | 7 Unionists | 20 | 68 |
| 38-special-session-0 | 38 | Special session | 1863-03-04 | 1863-03-14 | 1863-03-04 | 0 | Republicans | 31 | Democrats | 10 | 7 | 5 Unionists, 2 Unconditional Unionists | 20 | 68 | |
| 38-1st-session-0 | 38 | 1st session | 1 | 1863-12-07 | 1864-07-04 | 1863-12-07 | 0 | Republicans | 31 | Democrats | 10 | 9 | 5 Unionists, 4 Unconditional Unionists | 20 | 70 |
| 38-1st-session-1 | 38 | 1st session | 1 | 1863-12-07 | 1864-07-04 | 1864-01-02 | 1 | Republicans | 31 | Democrats | 10 | 8 | 3 Unionists, 5 Unconditional Unionists | 21 | 70 |
| 38-2nd-session-0 | 38 | 2nd session | 2 | 1864-12-05 | 1865-03-03 | 1864-12-05 | 0 | Republicans | 31 | Democrats | 10 | 8 | 3 Unionists, 5 Unconditional Unionists | 21 | 70 |
| 39-1st-session-1 | 39 | 1st session | 1 | 1865-12-04 | 1866-07-28 | 1865-01-20 | 1 | Republicans | 37 | Democrats | 10 | 3 | 2 Unconditional Unionists, 1 Unionist | 22 | 72 |
| 38-2nd-session-1 | 38 | 2nd session | 2 | 1864-12-05 | 1865-03-03 | 1865-02-01 | 1 | Republicans | 33 | Democrats | 10 | 8 | 3 Unionists, 5 Unconditional Unionists | 21 | 72 |
| 39-special-session-0 | 39 | Special session | 1865-03-04 | 1865-03-11 | 1865-03-04 | 0 | Republicans | 37 | Democrats | 9 | 3 | 1 Unionist, 2 Unconditional Unionists | 23 | 72 | |
| 39-1st-session-0 | 39 | 1st session | 1 | 1865-12-04 | 1866-07-28 | 1865-12-04 | 0 | Republicans | 36 | Democrats | 10 | 3 | 2 Unconditional Unionists, 1 Unionist | 23 | 72 |
| 39-1st-session-2 | 39 | 1st session | 1 | 1865-12-04 | 1866-07-28 | 1866-03-27 | 2 | Republicans | 37 | Democrats | 9 | 3 | 2 Unconditional Unionists, 1 Unionist | 23 | 72 |
| 39-1st-session-3 | 39 | 1st session | 1 | 1865-12-04 | 1866-07-28 | 1866-07-28 | 3 | Republicans | 37 | Democrats | 9 | 5 | 3 Unconditional Unionists, 2 Unionists | 21 | 72 |
| 39-2nd-session-0 | 39 | 2nd session | 2 | 1866-12-03 | 1867-03-03 | 1866-12-03 | 0 | Republicans | 39 | Democrats | 8 | 5 | 2 Unionists, 3 Unconditional Unionists | 20 | 72 |
| 40-1st-session-0 | 40 | 1st session | 1 | 1867-03-04 | 1867-12-01 | 1867-03-04 | 0 | Republicans | 45 | Democrats | 8 | 0 | 21 | 74 | |
| 40-special-session-0 | 40 | Special session | 1867-04-01 | 1867-04-20 | 1867-04-01 | 0 | Republicans | 45 | Democrats | 8 | 0 | 21 | 74 | ||
| 40-2nd-session-0 | 40 | 2nd session | 2 | 1867-12-02 | 1868-11-10 | 1867-12-02 | 0 | Republicans | 45 | Democrats | 8 | 0 | 21 | 74 | |
| 40-2nd-session-1 | 40 | 2nd session | 2 | 1867-12-02 | 1868-11-10 | 1868-03-09 | 1 | Republicans | 45 | Democrats | 9 | 0 | 20 | 74 | |
| 40-2nd-session-2 | 40 | 2nd session | 2 | 1867-12-02 | 1868-11-10 | 1868-06-23 | 2 | Republicans | 57 | Democrats | 9 | 0 | 8 | 74 | |
| 40-3rd-session-0 | 40 | 3rd session | 3 | 1868-12-07 | 1869-03-03 | 1868-12-07 | 0 | Republicans | 57 | Democrats | 9 | 0 | 8 | 74 | |
| 41-1st-session-0 | 41 | 1st session | 1 | 1869-03-04 | 1869-04-10 | 1869-03-04 | 0 | Republicans | 56 | Democrats | 10 | 0 | 8 | 74 | |
| 41-special-session-0 | 41 | Special session | 1869-04-12 | 1869-04-22 | 1869-04-12 | 0 | Republicans | 56 | Democrats | 10 | 0 | 8 | 74 | ||
| 41-2nd-session-0 | 41 | 2nd session | 2 | 1869-12-06 | 1870-07-15 | 1869-12-06 | 0 | Republicans | 56 | Democrats | 10 | 0 | 8 | 74 | |
| 41-2nd-session-1 | 41 | 2nd session | 2 | 1869-12-06 | 1870-07-15 | 1870-01-26 | 1 | Republicans | 61 | Democrats | 11 | 0 | 2 | 74 | |
| 41-3rd-session-0 | 41 | 3rd session | 3 | 1870-12-05 | 1871-03-03 | 1870-12-05 | 0 | Republicans | 62 | Democrats | 10 | 0 | 2 | 74 | |
| 41-3rd-session-1 | 41 | 3rd session | 3 | 1870-12-05 | 1871-03-03 | 1871-01-25 | 1 | Republicans | 61 | Democrats | 11 | 0 | 2 | 74 | |
| 41-3rd-session-2 | 41 | 3rd session | 3 | 1870-12-05 | 1871-03-03 | 1871-02-01 | 2 | Republicans | 62 | Democrats | 12 | 0 | 0 | 74 | |
| 42-1st-session-0 | 42 | 1st session | 1 | 1871-03-04 | 1871-04-20 | 1871-03-04 | 0 | Republicans | 55 | Democrats | 14 | 1 | 1 Liberal Republican | 4 | 74 |
| 42-special-session-0 | 42 | Special session | 1871-05-10 | 1871-05-27 | 1871-05-10 | 0 | Republicans | 55 | Democrats | 14 | 1 | 1 Liberal Republican | 4 | 74 | |
| 42-2nd-session-0 | 42 | 2nd session | 2 | 1871-12-04 | 1872-06-10 | 1871-12-04 | 0 | Republicans | 56 | Democrats | 14 | 1 | 1 Liberal Republican | 3 | 74 |
| 42-2nd-session-1 | 42 | 2nd session | 2 | 1871-12-04 | 1872-06-10 | 1871-12-19 | 1 | Republicans | 56 | Democrats | 15 | 1 | 1 Liberal Republican | 2 | 74 |
| 42-2nd-session-2 | 42 | 2nd session | 2 | 1871-12-04 | 1872-06-10 | 1872-01-15 | 2 | Republicans | 56 | Democrats | 16 | 1 | 1 Liberal Republican | 1 | 74 |
| 42-2nd-session-3 | 42 | 2nd session | 2 | 1871-12-04 | 1872-06-10 | 1872-04-24 | 3 | Republicans | 56 | Democrats | 17 | 1 | 1 Liberal Republican | 0 | 74 |
| 42-3rd-session-0 | 42 | 3rd session | 3 | 1872-12-02 | 1873-03-03 | 1872-12-02 | 0 | Republicans | 56 | Democrats | 17 | 1 | 1 Liberal Republican | 0 | 74 |
| 43-special-session-0 | 43 | Special session | 1873-03-04 | 1873-03-26 | 1873-03-04 | 0 | Republicans | 47 | Democrats | 19 | 7 | 7 Liberal Republicans | 1 | 74 | |
| 43-1st-session-0 | 43 | 1st session | 1 | 1873-12-01 | 1874-06-23 | 1873-12-01 | 0 | Republicans | 47 | Democrats | 19 | 7 | 7 Liberal Republicans | 1 | 74 |
| 43-1st-session-1 | 43 | 1st session | 1 | 1873-12-01 | 1874-06-23 | 1874-04-17 | 1 | Republicans | 48 | Democrats | 19 | 6 | 6 Liberal Republicans | 1 | 74 |
| 43-2nd-session-0 | 43 | 2nd session | 2 | 1874-12-07 | 1875-03-03 | 1874-12-07 | 0 | Republicans | 48 | Democrats | 19 | 6 | 6 Liberal Republicans | 1 | 74 |
| 43-2nd-session-1 | 43 | 2nd session | 2 | 1874-12-07 | 1875-03-03 | 1875-02-13 | 1 | Republicans | 47 | Democrats | 20 | 6 | 6 Liberal Republicans | 1 | 74 |
| 44-special-session-0 | 44 | Special session | 1875-03-05 | 1875-03-24 | 1875-03-05 | 0 | Republicans | 44 | Democrats | 28 | 1 | 1 Independent Republican | 1 | 74 | |
| 44-1st-session-0 | 44 | 1st session | 1 | 1875-12-06 | 1876-08-15 | 1875-12-06 | 0 | Republicans | 43 | Democrats | 29 | 1 | 1 Independent Republican | 1 | 74 |
| 44-2nd-session-0 | 44 | 2nd session | 2 | 1876-12-04 | 1877-03-03 | 1876-12-04 | 0 | Republicans | 45 | Democrats | 29 | 1 | 1 Independent Republican | 1 | 76 |
| 45-special-session-0 | 45 | Special session | 1877-03-04 | 1877-03-17 | 1877-03-04 | 0 | Republicans | 39 | Democrats | 33 | 1 | 1 Independent Republican | 3 | 76 | |
| 45-1st-session-0 | 45 | 1st session | 1 | 1877-10-15 | 1877-12-03 | 1877-10-15 | 0 | Republicans | 39 | Democrats | 33 | 1 | 1 Independent Republican | 3 | 76 |
| 45-1st-session-1 | 45 | 1st session | 1 | 1877-10-15 | 1877-12-03 | 1877-11-12 | 1 | Republicans | 39 | Democrats | 35 | 1 | 1 Independent Republican | 1 | 76 |
| 45-2nd-session-0 | 45 | 2nd session | 2 | 1877-12-03 | 1878-06-20 | 1877-12-03 | 0 | Republicans | 39 | Democrats | 36 | 1 | 1 Independent Republican | 0 | 76 |
| 45-3rd-session-0 | 45 | 3rd session | 3 | 1878-12-02 | 1879-03-03 | 1878-12-02 | 0 | Republicans | 39 | Democrats | 36 | 1 | 1 Independent Republican | 0 | 76 |
| 46-1st-session-0 | 46 | 1st session | 1 | 1879-03-18 | 1879-07-01 | 1879-03-18 | 0 | Democrats | 42 | Republicans | 33 | 1 | 1 Independent | 0 | 76 |
| 46-2nd-session-0 | 46 | 2nd session | 2 | 1879-12-01 | 1880-06-16 | 1879-12-01 | 0 | Democrats | 42 | Republicans | 33 | 1 | 1 Independent | 0 | 76 |
| 46-3rd-session-0 | 46 | 3rd session | 3 | 1880-12-06 | 1881-03-03 | 1880-12-06 | 0 | Democrats | 42 | Republicans | 33 | 1 | 1 Independent | 0 | 76 |
| 47-1st-special-session-0 | 47 | 1st special session | 1 | 1881-03-04 | 1881-05-20 | 1881-03-04 | 0 | Republicans | 37 | Democrats | 37 | 2 | 1 Independent, 1 Readjustor | 0 | 76 |
| 47-1st-special-session-1 | 47 | 1st special session | 1 | 1881-03-04 | 1881-05-20 | 1881-05-16 | 1 | Republicans | 35 | Democrats | 37 | 2 | 1 Independent, 1 Readjustor | 2 | 76 |
| 47-2nd-special-session-0 | 47 | 2nd special session | 2 | 1881-10-10 | 1881-10-29 | 1881-10-10 | 0 | Republicans | 34 | Democrats | 37 | 2 | 1 Independent, 1 Readjustor | 3 | 76 |
| 47-2nd-special-session-1 | 47 | 2nd special session | 2 | 1881-10-10 | 1881-10-29 | 1881-10-11 | 1 | Republicans | 37 | Democrats | 37 | 2 | 1 Independent, 1 Readjustor | 0 | 76 |
| 47-1st-session-0 | 47 | 1st session | 1 | 1881-12-05 | 1882-08-08 | 1881-12-05 | 0 | Republicans | 37 | Democrats | 37 | 2 | 1 Independent, 1 Readjustor | 0 | 76 |
| 47-2nd-session-0 | 47 | 2nd session | 2 | 1882-12-04 | 1883-03-03 | 1882-12-04 | 0 | Republicans | 37 | Democrats | 37 | 2 | 1 Independent, 1 Readjustor | 0 | 76 |
| 48-1st-session-0 | 48 | 1st session | 1 | 1883-12-03 | 1884-07-07 | 1883-12-03 | 0 | Republicans | 38 | Democrats | 36 | 2 | 2 Readjustors | 0 | 76 |
| 48-2nd-session-0 | 48 | 2nd session | 2 | 1884-12-01 | 1885-03-03 | 1884-12-01 | 0 | Republicans | 38 | Democrats | 36 | 2 | 2 Readjustors | 0 | 76 |
| 49-special-session-0 | 49 | Special session | 1885-03-04 | 1885-04-02 | 1885-03-04 | 0 | Republicans | 41 | Democrats | 34 | 0 | 1 | 76 | ||
| 49-1st-session-0 | 49 | 1st session | 1 | 1885-12-07 | 1886-08-05 | 1885-12-07 | 0 | Republicans | 42 | Democrats | 34 | 0 | 0 | 76 | |
| 49-1st-session-1 | 49 | 1st session | 1 | 1885-12-07 | 1886-08-05 | 1886-04-09 | 1 | Republicans | 41 | Democrats | 35 | 0 | 0 | 76 | |
| 49-2nd-session-0 | 49 | 2nd session | 2 | 1886-12-06 | 1887-03-03 | 1886-12-06 | 0 | Republicans | 42 | Democrats | 34 | 0 | 0 | 76 | |
| 50-1st-session-0 | 50 | 1st session | 1 | 1887-12-05 | 1888-10-20 | 1887-12-05 | 0 | Republicans | 39 | Democrats | 37 | 0 | 0 | 76 | |
| 50-2nd-session-0 | 50 | 2nd session | 2 | 1888-12-03 | 1889-03-03 | 1888-12-03 | 0 | Republicans | 39 | Democrats | 37 | 0 | 0 | 76 | |
| 51-special-session-0 | 51 | Special session | 1889-03-04 | 1889-04-02 | 1889-03-04 | 0 | Republicans | 39 | Democrats | 37 | 0 | 0 | 76 | ||
| 51-1st-session-0 | 51 | 1st session | 1 | 1889-12-02 | 1890-10-01 | 1889-12-02 | 0 | Republicans | 45 | Democrats | 37 | 0 | 0 | 82 | |
| 51-1st-session-1 | 51 | 1st session | 1 | 1889-12-02 | 1890-10-01 | 1890-04-17 | 1 | Republicans | 47 | Democrats | 37 | 0 | 0 | 84 | |
| 51-2nd-session-0 | 51 | 2nd session | 2 | 1890-12-01 | 1891-03-03 | 1890-12-01 | 0 | Republicans | 49 | Democrats | 37 | 0 | 0 | 86 | |
| 51-2nd-session-1 | 51 | 2nd session | 2 | 1890-12-01 | 1891-03-03 | 1890-12-29 | 1 | Republicans | 51 | Democrats | 37 | 0 | 88 | ||
| 52-1st-session-0 | 52 | 1st session | 1 | 1891-12-07 | 1892-08-05 | 1891-12-07 | 0 | Republicans | 47 | Democrats | 38 | 2 | 2 Populists | 1 | 88 |
| 52-1st-session-1 | 52 | 1st session | 1 | 1891-12-07 | 1892-08-05 | 1892-01-07 | 1 | Republicans | 47 | Democrats | 39 | 2 | 2 Populists | 0 | 88 |
| 52-2nd-session-0 | 52 | 2nd session | 2 | 1892-12-05 | 1893-03-03 | 1892-12-05 | 0 | Republicans | 47 | Democrats | 39 | 2 | 2 Populists | 0 | 88 |
| 53-special-session-0 | 53 | Special session | 1893-03-04 | 1893-04-15 | 1893-03-04 | 0 | Democrats | 44 | Republicans | 37 | 4 | 3 Populists, 1 Silver Republican | 3 | 88 | |
| 53-1st-e-session-0 | 53 | 1st (E) session | 1 | 1893-08-07 | 1893-11-03 | 1893-08-07 | 0 | Democrats | 44 | Republicans | 37 | 4 | 3 Populists, 1 Silver Republican | 3 | 88 |
| 53-2nd-session-0 | 53 | 2nd session | 2 | 1893-12-04 | 1894-08-28 | 1893-12-04 | 0 | Democrats | 44 | Republicans | 37 | 4 | 3 Populists, 1 Silver Republican | 3 | 88 |
| 53-3rd-session-0 | 53 | 3rd session | 3 | 1894-12-03 | 1895-03-03 | 1894-12-03 | 0 | Democrats | 44 | Republicans | 37 | 4 | 3 Populists, 1 Silver Republican | 3 | 88 |
| 53-3rd-session-1 | 53 | 3rd session | 3 | 1894-12-03 | 1895-03-03 | 1895-01-24 | 1 | Democrats | 43 | Republicans | 38 | 4 | 3 Populists, 1 Silver Republican | 3 | 88 |
| 53-3rd-session-2 | 53 | 3rd session | 3 | 1894-12-03 | 1895-03-03 | 1895-02-02 | 2 | Democrats | 43 | Republicans | 41 | 4 | 3 Populists, 1 Silver Republican | 0 | 88 |
| 54-1st-session-0 | 54 | 1st session | 1 | 1895-12-02 | 1896-06-11 | 1895-12-02 | 0 | Republicans | 42 | Democrats | 39 | 6 | 4 Populists, 2 Silver Republicans | 1 | 88 |
| 54-1st-session-1 | 54 | 1st session | 1 | 1895-12-02 | 1896-06-11 | 1896-01-22 | 1 | Republicans | 44 | Democrats | 39 | 6 | 4 Populists, 2 Silver Republicans | 1 | 90 |
| 54-2nd-session-0 | 54 | 2nd session | 2 | 1896-12-07 | 1897-03-03 | 1896-12-07 | 0 | Republicans | 44 | Democrats | 39 | 6 | 4 Populists, 2 Silver Republicans | 1 | 90 |
| 54-2nd-session-1 | 54 | 2nd session | 2 | 1896-12-07 | 1897-03-03 | 1897-02-05 | 1 | Republicans | 44 | Democrats | 40 | 6 | 4 Populists, 2 Silver Republicans | 0 | 90 |
| 55-special-session-0 | 55 | Special session | 1897-03-04 | 1897-03-10 | 1897-03-04 | 0 | Republicans | 43 | Democrats | 33 | 12 | 5 Populists, 5 Silver Republicans, 2 Silverites | 2 | 90 | |
| 55-1st-e-session-0 | 55 | 1st (E) session | 1 | 1897-03-15 | 1897-07-24 | 1897-03-15 | 0 | Republicans | 43 | Democrats | 33 | 12 | 5 Populists, 5 Silver Republicans, 2 Silverites | 2 | 90 |
| 55-1st-e-session-1 | 55 | 1st (E) session | 1 | 1897-03-15 | 1897-07-24 | 1897-05-25 | 1 | Republicans | 43 | Democrats | 34 | 12 | 5 Populists, 5 Silver Republicans, 2 Silverites | 1 | 90 |
| 55-2nd-session-0 | 55 | 2nd session | 2 | 1897-12-06 | 1898-07-08 | 1897-12-06 | 0 | Republicans | 43 | Democrats | 34 | 12 | 5 Populists, 5 Silver Republicans, 2 Silverites | 1 | 90 |
| 55-3rd-session-0 | 55 | 3rd session | 3 | 1898-12-05 | 1899-03-03 | 1898-12-05 | 0 | Republicans | 44 | Democrats | 34 | 12 | 5 Populists, 5 Silver Republicans, 2 Silverites | 0 | 90 |
| 56-1st-session-0 | 56 | 1st session | 1 | 1899-12-04 | 1900-06-07 | 1899-12-04 | 0 | Republicans | 50 | Democrats | 26 | 10 | 5 Populists, 3 Silver Republicans, 2 Silverites | 4 | 90 |
| 56-1st-session-1 | 56 | 1st session | 1 | 1899-12-04 | 1900-06-07 | 1900-03-05 | 1 | Republicans | 51 | Democrats | 26 | 10 | 5 Populists, 3 Silver Republicans, 2 Silverites | 3 | 90 |
| 56-2nd-session-0 | 56 | 2nd session | 2 | 1900-12-03 | 1901-03-03 | 1900-12-03 | 0 | Republicans | 50 | Democrats | 27 | 10 | 5 Populists, 3 Silver Republicans, 2 Silverites | 3 | 90 |
| 56-2nd-session-1 | 56 | 2nd session | 2 | 1900-12-03 | 1901-03-03 | 1901-01-17 | 1 | Republicans | 51 | Democrats | 27 | 10 | 5 Populists, 3 Silver Republicans, 2 Silverites | 2 | 90 |
| 56-2nd-session-2 | 56 | 2nd session | 2 | 1900-12-03 | 1901-03-03 | 1901-01-28 | 2 | Republicans | 52 | Democrats | 26 | 10 | 5 Populists, 3 Silver Republicans, 2 Silverites | 2 | 90 |
| 56-2nd-session-3 | 56 | 2nd session | 2 | 1900-12-03 | 1901-03-03 | 1901-02-04 | 3 | Republicans | 53 | Democrats | 26 | 10 | 5 Populists, 3 Silver Republicans, 2 Silverites | 1 | 90 |
| 57-special-session-0 | 57 | Special session | 1901-03-04 | 1901-03-09 | 1901-03-04 | 0 | Republicans | 52 | Democrats | 31 | 4 | 4 Populists | 3 | 90 | |
| 57-1st-session-0 | 57 | 1st session | 1 | 1901-12-01 | 1902-07-01 | 1901-12-01 | 0 | Republicans | 55 | Democrats | 31 | 2 | 2 Populists | 2 | 90 |
| 57-1st-session-1 | 57 | 1st session | 1 | 1901-12-01 | 1902-07-01 | 1901-12-27 | 1 | Republicans | 54 | Democrats | 31 | 2 | 2 Populists | 3 | 90 |
| 57-1st-session-2 | 57 | 1st session | 1 | 1901-12-01 | 1902-07-01 | 1902-02-04 | 2 | Republicans | 55 | Democrats | 31 | 2 | 2 Populists | 2 | 90 |
| 57-2nd-session-0 | 57 | 2nd session | 2 | 1902-12-01 | 1903-03-03 | 1902-12-01 | 0 | Republicans | 55 | Democrats | 31 | 2 | 2 Populists | 2 | 90 |
| 57-2nd-session-1 | 57 | 2nd session | 2 | 1902-12-01 | 1903-03-03 | 1903-03-03 | 1 | Republicans | 57 | Democrats | 31 | 2 | 2 Populists | 0 | 90 |
| 58-special-session-0 | 58 | Special session | 1903-03-05 | 1903-03-19 | 1903-03-05 | 0 | Republicans | 57 | Democrats | 33 | 0 | 0 | 90 | ||
| 58-1st-e-session-0 | 58 | 1st (E) session | 1 | 1903-11-09 | 1903-12-07 | 1903-11-09 | 0 | Republicans | 57 | Democrats | 33 | 0 | 0 | 90 | |
| 58-2nd-session-0 | 58 | 2nd session | 2 | 1903-12-07 | 1904-04-28 | 1903-12-07 | 0 | Republicans | 57 | Democrats | 33 | 0 | 0 | 90 | |
| 58-3rd-session-0 | 58 | 3rd session | 3 | 1904-12-05 | 1905-03-03 | 1904-12-05 | 0 | Republicans | 57 | Democrats | 33 | 0 | 0 | 90 | |
| 59-special-session-0 | 59 | Special session | 1905-03-04 | 1905-03-18 | 1905-03-04 | 0 | Republicans | 56 | Democrats | 32 | 0 | 2 | 90 | ||
| 59-1st-session-0 | 59 | 1st session | 1 | 1905-12-04 | 1906-06-30 | 1905-12-04 | 0 | Republicans | 56 | Democrats | 33 | 0 | 1 | 90 | |
| 59-2nd-session-0 | 59 | 2nd session | 2 | 1906-12-03 | 1907-03-03 | 1906-12-03 | 0 | Republicans | 57 | Democrats | 33 | 0 | 0 | 90 | |
| 59-2nd-session-1 | 59 | 2nd session | 2 | 1906-12-03 | 1907-03-03 | 1907-01-30 | 1 | Republicans | 58 | Democrats | 32 | 0 | 0 | 90 | |
| 61-1st-e-session-0 | 61 | 1st (E) session | 1 | 1909-03-15 | 1909-08-05 | 1907-03-15 | 0 | Republicans | 59 | Democrats | 32 | 0 | 1 | 92 | |
| 60-1st-session-0 | 60 | 1st session | 1 | 1907-12-02 | 1908-05-30 | 1907-12-02 | 0 | Republicans | 60 | Democrats | 31 | 0 | 1 | 92 | |
| 60-1st-session-1 | 60 | 1st session | 1 | 1907-12-02 | 1908-05-30 | 1908-01-27 | 1 | Republicans | 61 | Democrats | 31 | 0 | 0 | 92 | |
| 60-2nd-session-0 | 60 | 2nd session | 2 | 1908-12-07 | 1909-03-03 | 1908-12-07 | 0 | Republicans | 61 | Democrats | 31 | 0 | 0 | 92 | |
| 61-special-session-0 | 61 | Special session | 1909-03-04 | 1909-03-06 | 1909-03-04 | 0 | Republicans | 58 | Democrats | 32 | 0 | 2 | 92 | ||
| 61-1st-e-session-1 | 61 | 1st (E) session | 1 | 1909-03-15 | 1909-08-05 | 1909-06-18 | 1 | Republicans | 60 | Democrats | 32 | 0 | 0 | 92 | |
| 61-2nd-session-0 | 61 | 2nd session | 2 | 1909-12-06 | 1910-06-23 | 1909-12-06 | 0 | Republicans | 59 | Democrats | 33 | 0 | 0 | 92 | |
| 61-3rd-session-0 | 61 | 3rd session | 3 | 1910-12-05 | 1911-03-03 | 1910-12-05 | 0 | Republicans | 59 | Democrats | 33 | 0 | 0 | 92 | |
| 62-1st-e-session-0 | 62 | 1st (E) session | 1 | 1911-04-04 | 1911-08-22 | 1911-04-04 | 0 | Republicans | 50 | Democrats | 41 | 0 | 1 | 92 | |
| 62-2nd-session-0 | 62 | 2nd session | 2 | 1911-12-04 | 1912-08-26 | 1911-12-04 | 0 | Republicans | 49 | Democrats | 42 | 0 | 1 | 92 | |
| 62-2nd-session-1 | 62 | 2nd session | 2 | 1911-12-04 | 1912-08-26 | 1912-04-02 | 1 | Republicans | 51 | Democrats | 44 | 0 | 1 | 96 | |
| 62-2nd-session-2 | 62 | 2nd session | 2 | 1911-12-04 | 1912-08-26 | 1912-04-11 | 2 | Republicans | 52 | Democrats | 43 | 0 | 1 | 96 | |
| 62-3rd-session-0 | 62 | 3rd session | 3 | 1912-12-02 | 1913-03-03 | 1912-12-02 | 0 | Republicans | 51 | Democrats | 44 | 0 | 1 | 96 | |
| 62-3rd-session-1 | 62 | 3rd session | 3 | 1912-12-02 | 1913-03-03 | 1913-01-20 | 1 | Republicans | 51 | Democrats | 45 | 0 | 0 | 96 | |
| 63-special-session-0 | 63 | Special session | 1913-03-04 | 1913-03-17 | 1913-03-04 | 0 | Democrats | 50 | Republicans | 43 | 1 | 1 Progressive | 2 | 96 | |
| 63-1st-e-session-0 | 63 | 1st (E) session | 1 | 1913-04-07 | 1913-11-29 | 1913-04-07 | 0 | Democrats | 51 | Republicans | 44 | 1 | 1 Progressive | 0 | 96 |
| 63-2nd-session-0 | 63 | 2nd session | 2 | 1913-12-01 | 1914-10-24 | 1913-12-01 | 0 | Democrats | 51 | Republicans | 44 | 1 | 1 Progressive | 0 | 96 |
| 63-2nd-session-1 | 63 | 2nd session | 2 | 1913-12-01 | 1914-10-24 | 1914-01-28 | 1 | Democrats | 52 | Republicans | 43 | 1 | 1 Progressive | 0 | 96 |
| 63-2nd-session-2 | 63 | 2nd session | 2 | 1913-12-01 | 1914-10-24 | 1914-06-14 | 2 | Democrats | 53 | Republicans | 42 | 1 | 1 Progressive | 0 | 96 |
| 63-3rd-session-0 | 63 | 3rd session | 3 | 1914-12-07 | 1915-03-03 | 1914-12-07 | 0 | Democrats | 53 | Republicans | 42 | 1 | 1 Progressive | 0 | 96 |
| 64-1st-session-0 | 64 | 1st session | 1 | 1915-12-06 | 1916-09-08 | 1915-12-06 | 0 | Democrats | 56 | Republicans | 40 | 0 | 0 | 96 | |
| 64-2nd-session-0 | 64 | 2nd session | 2 | 1916-12-04 | 1917-03-03 | 1916-12-04 | 0 | Democrats | 55 | Republicans | 41 | 0 | 0 | 96 | |
| 65-special-session-0 | 65 | Special session | 1917-03-05 | 1917-03-16 | 1917-03-05 | 0 | Democrats | 54 | Republicans | 42 | 0 | 0 | 96 | ||
| 65-1st-session-0 | 65 | 1st session | 1 | 1917-04-02 | 1917-10-06 | 1917-04-02 | 0 | Democrats | 54 | Republicans | 42 | 0 | 0 | 96 | |
| 65-1st-session-1 | 65 | 1st session | 1 | 1917-04-02 | 1917-10-06 | 1917-06-08 | 1 | Democrats | 53 | Republicans | 43 | 0 | 0 | 96 | |
| 65-2nd-session-0 | 65 | 2nd session | 2 | 1917-12-03 | 1918-11-21 | 1917-12-03 | 0 | Democrats | 52 | Republicans | 43 | 0 | 1 | 96 | |
| 65-2nd-session-1 | 65 | 2nd session | 2 | 1917-12-03 | 1918-11-21 | 1918-01-30 | 1 | Democrats | 53 | Republicans | 42 | 0 | 1 | 96 | |
| 65-2nd-session-2 | 65 | 2nd session | 2 | 1917-12-03 | 1918-11-21 | 1918-03-07 | 2 | Democrats | 52 | Republicans | 43 | 0 | 1 | 96 | |
| 65-2nd-session-3 | 65 | 2nd session | 2 | 1917-12-03 | 1918-11-21 | 1918-04-18 | 3 | Democrats | 52 | Republicans | 44 | 0 | 0 | 96 | |
| 65-2nd-session-4 | 65 | 2nd session | 2 | 1917-12-03 | 1918-11-21 | 1918-11-21 | 4 | Democrats | 51 | Republicans | 45 | 0 | 0 | 96 | |
| 65-3rd-session-0 | 65 | 3rd session | 3 | 1918-12-02 | 1919-03-03 | 1918-12-02 | 0 | Democrats | 51 | Republicans | 45 | 0 | 0 | 96 | |
| 66-1st-e-session-0 | 66 | 1st (E) session | 1 | 1919-05-19 | 1919-11-19 | 1919-05-19 | 0 | Republicans | 49 | Democrats | 47 | 0 | 0 | 96 | |
| 66-2nd-session-0 | 66 | 2nd session | 2 | 1919-12-01 | 1920-06-05 | 1919-12-01 | 0 | Republicans | 49 | Democrats | 47 | 0 | 0 | 96 | |
| 66-3rd-session-0 | 66 | 3rd session | 3 | 1920-12-06 | 1921-03-03 | 1920-12-06 | 0 | Democrats | 49 | Republicans | 47 | 0 | 0 | 96 | |
| 66-3rd-session-1 | 66 | 3rd session | 3 | 1920-12-06 | 1921-03-03 | 1921-01-15 | 1 | Democrats | 50 | Republicans | 46 | 0 | 0 | 96 | |
| 67-special-session-0 | 67 | Special session | 1921-03-04 | 1921-03-15 | 1921-03-04 | 0 | Republicans | 59 | Democrats | 37 | 0 | 0 | 96 | ||
| 67-1st-e-session-0 | 67 | 1st (E) session | 1 | 1921-04-11 | 1921-11-23 | 1921-04-11 | 0 | Republicans | 59 | Democrats | 37 | 0 | 0 | 96 | |
| 67-1st-e-session-1 | 67 | 1st (E) session | 1 | 1921-04-11 | 1921-11-23 | 1921-07-26 | 1 | Republicans | 60 | Democrats | 36 | 0 | 0 | 96 | |
| 67-2nd-session-0 | 67 | 2nd session | 2 | 1921-12-05 | 1922-09-22 | 1921-12-05 | 0 | Republicans | 60 | Democrats | 36 | 0 | 0 | 96 | |
| 67-3rd-e-session-0 | 67 | 3rd (E) session | 3 | 1922-11-20 | 1922-12-04 | 1922-11-20 | 0 | Republicans | 59 | Democrats | 36 | 0 | 1 | 96 | |
| 68-2nd-session-0 | 68 | 2nd session | 2 | 1922-12-01 | 1923-03-03 | 1922-12-01 | 0 | Republicans | 52 | Democrats | 42 | 2 | 2 Farmer-Laborites | 0 | 96 |
| 67-4th-session-0 | 67 | 4th session | 4 | 1922-12-04 | 1923-03-03 | 1922-12-04 | 0 | Republicans | 60 | Democrats | 36 | 0 | 0 | 96 | |
| 68-1st-session-0 | 68 | 1st session | 1 | 1923-12-03 | 1924-06-07 | 1923-12-03 | 0 | Republicans | 51 | Democrats | 43 | 2 | 2 Farmer-Laborites | 0 | 96 |
| 69-special-session-0 | 69 | Special session | 1925-03-04 | 1925-03-18 | 1925-03-04 | 0 | Republican | 55 | Democrats | 40 | 1 | 1 Farmer Laborite | 0 | 96 | |
| 69-1st-session-0 | 69 | 1st session | 1 | 1925-12-07 | 1926-07-03 | 1925-12-07 | 0 | Republicans | 56 | Democrats | 39 | 1 | 1 Farmer Laborite | 0 | 96 |
| 69-1st-session-1 | 69 | 1st session | 1 | 1925-12-07 | 1926-07-03 | 1926-04-12 | 1 | Republicans | 55 | Democrats | 40 | 1 | 1 Farmer Laborite | 0 | 96 |
| 69-2nd-session-0 | 69 | 2nd session | 2 | 1926-12-06 | 1927-03-03 | 1926-12-06 | 0 | Republicans | 53 | Democrats | 42 | 1 | 1 Farmer Laborite | 0 | 96 |
| 70-1st-session-0 | 70 | 1st session | 1 | 1927-12-05 | 1928-05-29 | 1927-12-05 | 0 | Republicans | 46 | Democrats | 47 | 1 | 1 Farmer-Laborite | 2 | 96 |
| 70-1st-session-1 | 70 | 1st session | 1 | 1927-12-05 | 1928-05-29 | 1928-01-04 | 1 | Republicans | 47 | Democrats | 46 | 1 | 1 Farmer-Laborite | 2 | 96 |
| 70-1st-session-2 | 70 | 1st session | 1 | 1927-12-05 | 1928-05-29 | 1928-04-05 | 2 | Republicans | 48 | Democrats | 45 | 1 | 1 Farmer-Laborite | 2 | 96 |
| 70-1st-session-3 | 70 | 1st session | 1 | 1927-12-05 | 1928-05-29 | 1928-04-16 | 3 | Republicans | 47 | Democrats | 46 | 1 | 1 Farmer-Laborite | 2 | 96 |
| 70-2nd-session-0 | 70 | 2nd session | 2 | 1928-12-03 | 1929-03-03 | 1928-12-03 | 0 | Republicans | 48 | Democrats | 46 | 1 | 1 Farmer-Laborite | 1 | 96 |
| 70-2nd-session-1 | 70 | 2nd session | 2 | 1928-12-03 | 1929-03-03 | 1928-12-15 | 1 | Republicans | 49 | Democrats | 45 | 1 | 1 Farmer-Laborite | 1 | 96 |
| 71-1st-session-0 | 71 | 1st session | 1 | 1929-03-04 | 1929-03-05 | 1929-03-04 | 0 | Republicans | 54 | Democrats | 39 | 1 | 1 Farmer-Laborite | 2 | 96 |
| 71-1st-e-session-0 | 71 | 1st (E) session | 1 | 1929-04-15 | 1929-11-22 | 1929-04-15 | 0 | Republicans | 55 | Democrats | 39 | 1 | 1 Farmer-Laborite | 1 | 96 |
| 71-2nd-session-0 | 71 | 2nd session | 2 | 1929-12-02 | 1930-07-03 | 1929-12-02 | 0 | Republicans | 56 | Democrats | 39 | 1 | 1 Farmer-Laborite | 0 | 96 |
| 71-special-session-0 | 71 | Special session | 1930-07-07 | 1930-07-21 | 1930-07-07 | 0 | Republicans | 56 | Democrats | 39 | 1 | 1 Farmer-Laborite | 0 | 96 | |
| 71-3rd-session-0 | 71 | 3rd session | 3 | 1930-12-01 | 1931-03-03 | 1930-12-01 | 0 | Republicans | 53 | Democrats | 42 | 1 | 1 Farmer-Laborite | 0 | 96 |
| 72-1st-session-0 | 72 | 1st session | 1 | 1931-12-07 | 1932-07-16 | 1931-12-07 | 0 | Republicans | 48 | Democrats | 46 | 1 | 1 Farmer-Laborite | 1 | 96 |
| 72-1st-session-1 | 72 | 1st session | 1 | 1931-12-07 | 1932-07-16 | 1932-01-25 | 1 | Republicans | 48 | Democrats | 47 | 1 | 1 Farmer Laborite | 0 | 96 |
| 72-2nd-session-0 | 72 | 2nd session | 2 | 1932-12-05 | 1933-03-03 | 1932-12-05 | 0 | Republicans | 48 | Democrats | 47 | 1 | 1 Farmer Laborite | 0 | 96 |
| 73-special-session-0 | 73 | Special session | 1933-03-04 | 1933-03-06 | 1933-03-04 | 0 | Democrats | 59 | Republicans | 36 | 1 | 1 Farmer Laborite | 0 | 96 | |
| 73-1st-session-0 | 73 | 1st session | 1 | 1933-03-09 | 1933-06-15 | 1933-03-09 | 0 | Democrats | 59 | Republicans | 36 | 1 | 1 Farmer Laborite | 0 | 96 |
| 73-1st-session-1 | 73 | 1st session | 1 | 1933-03-09 | 1933-06-15 | 1933-03-11 | 1 | Democrats | 59 | Republicans | 35 | 1 | 1 Farmer Laborite | 1 | 96 |
| 73-1st-session-2 | 73 | 1st session | 1 | 1933-03-09 | 1933-06-15 | 1933-05-24 | 2 | Democrats | 60 | Republicans | 35 | 1 | 1 Farmer Laborite | 0 | 96 |
| 73-2nd-session-0 | 73 | 2nd session | 2 | 1934-01-03 | 1934-06-18 | 1934-01-03 | 0 | Democrats | 60 | Republicans | 35 | 1 | 1 Farmer Laborite | 0 | 96 |
| 74-1st-session-0 | 74 | 1st session | 1 | 1935-01-03 | 1935-08-26 | 1935-01-03 | 0 | Democrats | 68 | Republicans | 25 | 2 | 1 Farmer-Laborite, 1 Progressive | 1 | 96 |
| 74-1st-session-1 | 74 | 1st session | 1 | 1935-01-03 | 1935-08-26 | 1935-05-20 | 1 | Democrats | 69 | Republicans | 24 | 2 | 1 Farmer-Laborite, 1 Progressive | 1 | 96 |
| 74-1st-session-2 | 74 | 1st session | 1 | 1935-01-03 | 1935-08-26 | 1935-06-21 | 2 | Democrats | 70 | Republicans | 24 | 2 | 1 Farmer-Laborite, 1 Progressive | 0 | 96 |
| 74-2nd-session-0 | 74 | 2nd session | 2 | 1936-01-03 | 1937-06-20 | 1936-01-03 | 0 | Democrats | 70 | Republicans | 23 | 3 | 2 Farmer-Laborites, 1 Progressive | 0 | 96 |
| 75-1st-session-0 | 75 | 1st session | 1 | 1937-01-05 | 1937-08-21 | 1937-01-03 | 0 | Democrats | 75 | Republicans | 16 | 4 | 2 Farmer-Laborites, 1 Progressive, 1 Independent | 1 | 96 |
| 75-1st-session-1 | 75 | 1st session | 1 | 1937-01-05 | 1937-08-21 | 1937-04-15 | 1 | Democrats | 76 | Republicans | 16 | 4 | 2 Farmer-Laborites, 1 Progressive, 1 Independent | 0 | 96 |
| 75-2nd-session-0 | 75 | 2nd session | 2 | 1937-11-15 | 1937-12-21 | 1937-11-15 | 0 | Democrats | 76 | Republicans | 16 | 4 | 2 Farmer-Laborites, 1 Progressive, 1 Independent | 96 | |
| 75-3rd-session-0 | 75 | 3rd session | 3 | 1938-01-03 | 1938-06-16 | 1938-01-03 | 0 | Democrats | 76 | Republicans | 16 | 4 | 2 Farmer-Laborites, 1 Progressive, 1 Independent | 0 | 96 |
| 75-3rd-session-1 | 75 | 3rd session | 3 | 1938-01-03 | 1938-06-16 | 1938-02-11 | 1 | Democrats | 77 | Republicans | 15 | 4 | 2 Farmer-Laborites, 1 Progressive, 1 Independent | 0 | 96 |
| 76-1st-session-0 | 76 | 1st session | 1 | 1939-01-03 | 1939-08-05 | 1939-01-03 | 0 | Democrats | 69 | Republicans | 23 | 4 | 2 Farmer-Laborites, 1 Progressive, 1 Independent | 0 | 96 |
| 76-2nd-session-0 | 76 | 2nd session | 2 | 1939-09-21 | 1939-11-03 | 1939-09-21 | 0 | Democrats | 69 | Republicans | 23 | 4 | 2 Farmer-Laborites, 1 Progressive, 1 Independent | 0 | 96 |
| 76-3rd-session-0 | 76 | 3rd session | 3 | 1940-01-03 | 1941-01-03 | 1940-01-03 | 0 | Democrats | 69 | Republicans | 23 | 4 | 2 Farmer-Laborites, 1 Progressive, 1 Independent | 0 | 96 |
| 76-3rd-session-1 | 76 | 3rd session | 3 | 1940-01-03 | 1941-01-03 | 1940-08-31 | 1 | Democrats | 69 | Republicans | 23 | 3 | 1 Farmer-Laborite, 1 Progressive, 1 Independent | 1 | 96 |
| 76-3rd-session-2 | 76 | 3rd session | 3 | 1940-01-03 | 1941-01-03 | 1940-10-17 | 2 | Democrats | 69 | Republicans | 24 | 3 | 1 Farmer-Laborite, 1 Progressive, 1 Independent | 0 | 96 |
| 76-3rd-session-3 | 76 | 3rd session | 3 | 1940-01-03 | 1941-01-03 | 1940-11-22 | 3 | Democrats | 68 | Republicans | 25 | 3 | 1 Farmer-Laborite, 1 Progressive, 1 Independent | 0 | 96 |
| 77-1st-session-0 | 77 | 1st session | 1 | 1941-01-03 | 1942-01-02 | 1941-01-03 | 0 | Democrats | 66 | Republicans | 28 | 2 | 1 Progressive, 1 Independent | 0 | 96 |
| 77-1st-session-1 | 77 | 1st session | 1 | 1941-01-03 | 1942-01-02 | 1941-12-20 | 1 | Democrats | 65 | Republicans | 29 | 2 | 1 Progressive, 1 Independent | 0 | 96 |
| 77-2nd-session-0 | 77 | 2nd session | 2 | 1942-01-05 | 1942-12-16 | 1942-01-05 | 0 | Democrats | 65 | Republicans | 29 | 2 | 1 Progressive, 1 Independent | 0 | 96 |
| 77-2nd-session-1 | 77 | 2nd session | 2 | 1942-01-05 | 1942-12-16 | 1942-11-18 | 1 | Democrats | 64 | Republicans | 30 | 2 | 1 Progressive, 1 Independent | 0 | 96 |
| 78-1st-session-0 | 78 | 1st session | 1 | 1943-01-06 | 1943-12-21 | 1943-01-06 | 0 | Democrats | 57 | Republicans | 38 | 1 | 1 Progressive | 0 | 96 |
| 78-1st-session-1 | 78 | 1st session | 1 | 1943-01-06 | 1943-12-21 | 1943-11-29 | 1 | Democrats | 58 | Republicans | 37 | 1 | 1 Progressive | 0 | 96 |
| 78-2nd-session-0 | 78 | 2nd session | 2 | 1944-01-10 | 1944-12-19 | 1944-01-10 | 0 | Democrats | 58 | Republicans | 37 | 1 | 1 Progressive | 0 | 96 |
| 78-2nd-session-1 | 78 | 2nd session | 2 | 1944-01-10 | 1944-12-19 | 1944-12-07 | 1 | Democrats | 57 | Republicans | 38 | 1 | 1 Progressive | 0 | 96 |
| 79-1st-session-0 | 79 | 1st session | 1 | 1945-01-03 | 1945-12-21 | 1945-01-03 | 0 | Democrats | 57 | Republicans | 38 | 1 | 1 Progressive | 0 | 96 |
| 79-1st-session-1 | 79 | 1st session | 1 | 1945-01-03 | 1945-12-21 | 1945-02-15 | 1 | Democrats | 56 | Republicans | 39 | 1 | 1 Progressive | 0 | 96 |
| 79-1st-session-2 | 79 | 1st session | 1 | 1945-01-03 | 1945-12-21 | 1945-03-19 | 2 | Democrats | 55 | Republicans | 40 | 1 | 1 Progressive | 0 | 96 |
| 79-1st-session-3 | 79 | 1st session | 1 | 1945-01-03 | 1945-12-21 | 1945-10-09 | 3 | Democrats | 56 | Republicans | 39 | 1 | 1 Progressive | 0 | 96 |
| 79-1st-session-4 | 79 | 1st session | 1 | 1945-01-03 | 1945-12-21 | 1945-11-23 | 4 | Democrats | 55 | Republicans | 40 | 1 | 1 Progressive | 0 | 96 |
| 79-1st-session-5 | 79 | 1st session | 1 | 1945-01-03 | 1945-12-21 | 1945-11-29 | 5 | Democrats | 56 | Republicans | 39 | 1 | 1 Progressive | 0 | 96 |
| 79-2nd-session-0 | 79 | 2nd session | 2 | 1946-01-14 | 1946-08-02 | 1946-01-14 | 0 | Democrats | 56 | Republicans | 39 | 1 | 1 Progressive | 0 | 96 |
| 80-1st-session-0 | 80 | 1st session | 1 | 1947-01-03 | 1947-12-19 | 1947-01-03 | 0 | Republicans | 51 | Democrats | 44 | 0 | 1 | 96 | |
| 80-1st-session-1 | 80 | 1st session | 1 | 1947-01-03 | 1947-12-19 | 1947-11-17 | 1 | Republicans | 51 | Democrats | 45 | 0 | 0 | 96 | |
| 80-2nd-session-0 | 80 | 2nd session | 2 | 1948-01-06 | 1948-12-31 | 1948-01-06 | 0 | Republicans | 51 | Democrats | 45 | 0 | 0 | 96 | |
| 81-1st-session-0 | 81 | 1st session | 1 | 1949-01-03 | 1949-10-19 | 1949-01-03 | 0 | Democrats | 54 | Republicans | 42 | 0 | 0 | 96 | |
| 81-1st-session-1 | 81 | 1st session | 1 | 1949-01-03 | 1949-10-19 | 1949-07-08 | 1 | Democrats | 53 | Republicans | 43 | 0 | 0 | 96 | |
| 81-1st-session-2 | 81 | 1st session | 1 | 1949-01-03 | 1949-10-19 | 1949-10-17 | 2 | Democrats | 52 | Republicans | 44 | 0 | 0 | 96 | |
| 81-2nd-session-0 | 81 | 2nd session | 2 | 1950-01-03 | 1951-01-02 | 1950-01-03 | 0 | Democrats | 54 | Republicans | 42 | 0 | 0 | 96 | |
| 81-2nd-session-1 | 81 | 2nd session | 2 | 1950-01-03 | 1951-01-02 | 1950-12-04 | 1 | Democrats | 53 | Republicans | 43 | 0 | 0 | 96 | |
| 82-1st-session-0 | 82 | 1st session | 1 | 1951-01-03 | 1951-10-20 | 1951-01-03 | 0 | Democrats | 49 | Republicans | 47 | 0 | 0 | 96 | |
| 82-1st-session-1 | 82 | 1st session | 1 | 1951-01-03 | 1951-10-20 | 1951-04-25 | 1 | Democrats | 50 | Republicans | 46 | 0 | 0 | 96 | |
| 82-2nd-session-0 | 82 | 2nd session | 2 | 1952-01-08 | 1952-07-07 | 1952-01-08 | 0 | Democrats | 50 | Republicans | 46 | 0 | 0 | 96 | |
| 83-1st-session-0 | 83 | 1st session | 1 | 1953-01-03 | 1953-08-03 | 1953-01-03 | 0 | Republicans | 48 | Democrats | 47 | 1 | 1 Independent | 0 | 96 |
| 83-1st-session-1 | 83 | 1st session | 1 | 1953-01-03 | 1953-08-03 | 1953-07-31 | 1 | Republicans | 46 | Democrats | 47 | 1 | 1 Independent | 2 | 96 |
| 83-2nd-session-0 | 83 | 2nd session | 2 | 1954-01-06 | 1954-12-02 | 1954-01-06 | 0 | Republicans | 47 | Democrats | 48 | 1 | 1 Independent | 0 | 96 |
| 83-2nd-session-1 | 83 | 2nd session | 2 | 1954-01-06 | 1954-12-02 | 1954-06-28 | 1 | Republicans | 48 | Democrats | 47 | 1 | 1 Independent | 0 | 96 |
| 83-2nd-session-2 | 83 | 2nd session | 2 | 1954-01-06 | 1954-12-02 | 1954-09-28 | 2 | Republicans | 48 | Democrats | 45 | 1 | 1 Independent | 2 | 96 |
| 83-2nd-session-3 | 83 | 2nd session | 2 | 1954-01-06 | 1954-12-02 | 1954-11-08 | 3 | Republicans | 49 | Democrats | 46 | 1 | 1 Independent | 0 | 96 |
| 83-2nd-session-4 | 83 | 2nd session | 2 | 1954-01-06 | 1954-12-02 | 1954-12-02 | 4 | Republicans | 47 | Democrats | 48 | 1 | 1 Independent | 0 | 96 |
| 84-1st-session-0 | 84 | 1st session | 1 | 1955-01-05 | 1955-08-02 | 1955-01-05 | 0 | Democrats | 47 | Republicans | 47 | 2 | 2 Independents | 0 | 96 |
| 84-2nd-session-0 | 84 | 2nd session | 2 | 1956-01-03 | 1956-07-27 | 1956-01-03 | 0 | Democrats | 48 | Republicans | 47 | 1 | 1 Independent | 0 | 96 |
| 84-2nd-session-1 | 84 | 2nd session | 2 | 1956-01-03 | 1956-07-27 | 1956-04-09 | 1 | Democrats | 49 | Republicans | 47 | 0 | 0 | 96 | |
| 84-2nd-session-2 | 84 | 2nd session | 2 | 1956-01-03 | 1956-07-27 | 1956-04-30 | 2 | Democrats | 48 | Republicans | 47 | 0 | 1 | 96 | |
| 84-2nd-session-3 | 84 | 2nd session | 2 | 1956-01-03 | 1956-07-27 | 1956-06-25 | 3 | Democrats | 49 | Republicans | 47 | 0 | 0 | 96 | |
| 85-1st-session-0 | 85 | 1st session | 1 | 1957-01-03 | 1957-08-30 | 1957-01-03 | 0 | Democrats | 49 | Republicans | 47 | 0 | 0 | 96 | |
| 85-1st-session-1 | 85 | 1st session | 1 | 1957-01-03 | 1957-08-30 | 1957-05-02 | 1 | Democrats | 49 | Republicans | 46 | 0 | 1 | 96 | |
| 85-1st-session-2 | 85 | 1st session | 1 | 1957-01-03 | 1957-08-30 | 1957-08-29 | 2 | Democrats | 50 | Republicans | 46 | 0 | 0 | 96 | |
| 85-2nd-session-0 | 85 | 2nd session | 2 | 1958-01-07 | 1958-08-24 | 1958-01-07 | 0 | Democrats | 50 | Republicans | 46 | 0 | 0 | 96 | |
| 85-2nd-session-1 | 85 | 2nd session | 2 | 1958-01-07 | 1958-08-24 | 1958-01-27 | 1 | Democrats | 49 | Republicans | 47 | 0 | 0 | 96 | |
| 86-1st-session-0 | 86 | 1st session | 1 | 1959-01-07 | 1959-09-15 | 1959-01-07 | 0 | Democrats | 64 | Republicans | 34 | 0 | 0 | 98 | |
| 87-1st-session-1 | 87 | 1st session | 1 | 1961-01-03 | 1961-09-27 | 1959-06-15 | 1 | Democrats | 64 | Republicans | 36 | 0 | 0 | 100 | |
| 86-1st-session-1 | 86 | 1st session | 1 | 1959-01-07 | 1959-09-15 | 1959-08-21 | 1 | Democrats | 65 | Republicans | 35 | 0 | 0 | 100 | |
| 86-2nd-session-0 | 86 | 2nd session | 2 | 1960-01-06 | 1960-09-01 | 1960-01-06 | 0 | Democrats | 65 | Republicans | 35 | 0 | 0 | 100 | |
| 86-2nd-session-1 | 86 | 2nd session | 2 | 1960-01-06 | 1960-09-01 | 1960-08-08 | 1 | Democrats | 66 | Republicans | 34 | 0 | 0 | 100 | |
| 87-1st-session-0 | 87 | 1st session | 1 | 1961-01-03 | 1961-09-27 | 1961-01-03 | 0 | Democrats | 65 | Republicans | 35 | 0 | 0 | 100 | |
| 87-2nd-session-0 | 87 | 2nd session | 2 | 1962-01-10 | 1962-10-13 | 1962-01-10 | 0 | Democrats | 64 | Republicans | 36 | 0 | 0 | 100 | |
| 88-1st-session-0 | 88 | 1st session | 1 | 1963-01-09 | 1963-12-30 | 1963-01-09 | 0 | Democrats | 67 | Republicans | 33 | 0 | 0 | 100 | |
| 88-2nd-session-0 | 88 | 2nd session | 2 | 1964-01-07 | 1964-10-03 | 1964-01-07 | 0 | Democrats | 67 | Republicans | 33 | 0 | 0 | 100 | |
| 88-2nd-session-1 | 88 | 2nd session | 2 | 1964-01-07 | 1964-10-03 | 1964-09-16 | 1 | Democrats | 66 | Republicans | 34 | 0 | 0 | 100 | |
| 89-1st-session-0 | 89 | 1st session | 1 | 1965-01-04 | 1965-10-23 | 1965-01-04 | 0 | Democrats | 68 | Republicans | 32 | 0 | 0 | 100 | |
| 89-2nd-session-0 | 89 | 2nd session | 2 | 1966-01-10 | 1966-10-22 | 1966-01-10 | 0 | Democrats | 68 | Republicans | 32 | 0 | 0 | 100 | |
| 89-2nd-session-1 | 89 | 2nd session | 2 | 1966-01-10 | 1966-10-22 | 1966-05-16 | 1 | Democrats | 67 | Republicans | 33 | 0 | 0 | 100 | |
| 90-1st-session-0 | 90 | 1st session | 1 | 1967-01-10 | 1967-12-15 | 1967-01-10 | 0 | Democrats | 64 | Republicans | 36 | 0 | 0 | 100 | |
| 90-2nd-session-0 | 90 | 2nd session | 2 | 1968-01-15 | 1968-10-14 | 1968-01-15 | 0 | Democrats | 64 | Republicans | 36 | 0 | 0 | 100 | |
| 90-2nd-session-1 | 90 | 2nd session | 2 | 1968-01-15 | 1968-10-14 | 1968-06-06 | 1 | Democrats | 63 | Republicans | 36 | 0 | 1 | 100 | |
| 90-2nd-session-2 | 90 | 2nd session | 2 | 1968-01-15 | 1968-10-14 | 1968-09-12 | 2 | Democrats | 63 | Republicans | 37 | 0 | 0 | 100 | |
| 91-1st-session-0 | 91 | 1st session | 1 | 1969-01-03 | 1969-12-23 | 1969-01-03 | 0 | Democrats | 57 | Republicans | 43 | 0 | 0 | 100 | |
| 91-2nd-session-0 | 91 | 2nd session | 2 | 1970-01-19 | 1971-01-02 | 1970-01-19 | 0 | Democrats | 57 | Republicans | 43 | 0 | 0 | 100 | |
| 91-2nd-session-1 | 91 | 2nd session | 2 | 1970-01-19 | 1971-01-02 | 1970-11-17 | 1 | Democrats | 58 | Republicans | 42 | 0 | 0 | 100 | |
| 92-1st-session-0 | 92 | 1st session | 1 | 1971-01-21 | 1971-12-17 | 1971-01-21 | 0 | Democrats | 54 | Republicans | 44 | 2 | 1 Conservative, 1 Independent | 0 | 100 |
| 92-2nd-session-0 | 92 | 2nd session | 2 | 1972-01-18 | 1972-10-18 | 1972-01-18 | 0 | Democrats | 54 | Republicans | 44 | 2 | 1 Conservative, 1 Independent | 0 | 100 |
| 93-1st-session-0 | 93 | 1st session | 1 | 1973-01-03 | 1973-12-22 | 1973-01-03 | 0 | Democrats | 56 | Republicans | 42 | 2 | 1 Conservative, 1 Independent | 0 | 100 |
| 93-2nd-session-0 | 93 | 2nd session | 2 | 1974-01-21 | 1974-12-20 | 1974-01-21 | 0 | Democrats | 57 | Republicans | 41 | 2 | 1 Conservative, 1 Independent | 0 | 100 |
| 94-1st-session-0 | 94 | 1st session | 1 | 1975-01-14 | 1975-12-19 | 1975-01-14 | 0 | Democrats | 60 | Republicans | 37 | 2 | 1 Conservative, 1 Independent | 1 | 100 |
| 94-1st-session-1 | 94 | 1st session | 1 | 1975-01-14 | 1975-12-19 | 1975-08-08 | 1 | Democrats | 60 | Republicans | 38 | 2 | 1 Conservative, 1 Independent | 0 | 100 |
| 94-1st-session-2 | 94 | 1st session | 1 | 1975-01-14 | 1975-12-19 | 1975-09-18 | 2 | Democrats | 61 | Republicans | 37 | 2 | 1 Conservative, 1 Independent | 0 | 100 |
| 94-2nd-session-0 | 94 | 2nd session | 2 | 1976-01-19 | 1976-10-01 | 1976-01-19 | 0 | Democrats | 61 | Republicans | 37 | 2 | 1 Conservative, 1 Independent | 0 | 100 |
| 95-1st-session-0 | 95 | 1st session | 1 | 1977-01-04 | 1977-12-15 | 1977-01-04 | 0 | Democrats | 61 | Republicans | 38 | 1 | 1 Independent | 0 | 100 |
| 95-2nd-session-0 | 95 | 2nd session | 2 | 1978-01-19 | 1978-10-15 | 1978-01-19 | 0 | Democrats | 61 | Republicans | 38 | 1 | 1 Independent | 0 | 100 |
| 96-1st-session-0 | 96 | 1st session | 1 | 1979-01-15 | 1980-01-03 | 1979-01-15 | 0 | Democrats | 58 | Republicans | 41 | 1 | 1 Independent | 0 | 100 |
| 96-2nd-session-0 | 96 | 2nd session | 2 | 1980-01-03 | 1980-12-16 | 1980-01-03 | 0 | Democrats | 58 | Republicans | 41 | 1 | 1 Independent | 0 | 100 |
| 97-1st-session-0 | 97 | 1st session | 1 | 1981-01-05 | 1981-12-16 | 1981-01-05 | 0 | Republicans | 53 | Democrats | 46 | 1 | 1 Independent | 0 | 100 |
| 97-2nd-session-0 | 97 | 2nd session | 2 | 1982-01-25 | 1983-12-21 | 1982-01-25 | 0 | Republicans | 53 | Democrats | 46 | 1 | 1 Independent | 0 | 100 |
| 97-2nd-session-1 | 97 | 2nd session | 2 | 1982-01-25 | 1983-12-21 | 1982-03-11 | 1 | Republicans | 53 | Democrats | 45 | 1 | 1 Independent | 1 | 100 |
| 97-2nd-session-2 | 97 | 2nd session | 2 | 1982-01-25 | 1983-12-21 | 1982-04-20 | 2 | Republicans | 54 | Democrats | 45 | 1 | 1 Independent | 100 | |
| 98-1st-session-0 | 98 | 1st session | 1 | 1983-01-03 | 1983-11-18 | 1983-01-03 | 0 | Republicans | 54 | Democrats | 46 | 0 | 0 | 100 | |
| 98-1st-session-1 | 98 | 1st session | 1 | 1983-01-03 | 1983-11-18 | 1983-09-12 | 1 | Republicans | 55 | Democrats | 45 | 0 | 0 | 100 | |
| 98-2nd-session-0 | 98 | 2nd session | 2 | 1984-01-23 | 1984-10-12 | 1984-01-23 | 0 | Republicans | 55 | Democrats | 45 | 0 | 0 | 100 | |
| 99-1st-session-0 | 99 | 1st session | 1 | 1985-01-03 | 1985-12-20 | 1985-01-03 | 0 | Republicans | 53 | Democrats | 47 | 0 | 0 | 100 | |
| 99-2nd-session-0 | 99 | 2nd session | 2 | 1986-01-21 | 1986-10-18 | 1986-01-21 | 0 | Republicans | 53 | Democrats | 47 | 0 | 0 | 100 | |
| 100-1st-session-0 | 100 | 1st session | 1 | 1987-01-06 | 1987-12-22 | 1987-01-06 | 0 | Democrats | 55 | Republicans | 45 | 0 | 0 | 100 | |
| 100-1st-session-1 | 100 | 1st session | 1 | 1987-01-06 | 1987-12-22 | 1987-03-13 | 1 | Democrats | 54 | Republicans | 46 | 0 | 0 | 100 | |
| 100-2nd-session-0 | 100 | 2nd session | 2 | 1988-01-25 | 1988-10-22 | 1988-01-25 | 0 | Democrats | 54 | Republicans | 46 | 0 | 0 | 100 | |
| 101-1st-session-0 | 101 | 1st session | 1 | 1989-01-03 | 1989-11-22 | 1989-01-03 | 0 | Democrats | 55 | Republicans | 45 | 0 | 0 | 100 | |
| 101-2nd-session-0 | 101 | 2nd session | 2 | 1990-01-23 | 1990-10-28 | 1990-01-23 | 0 | Democrats | 55 | Republicans | 45 | 0 | 0 | 100 | |
| 102-1st-session-0 | 102 | 1st session | 1 | 1991-01-03 | 1992-01-03 | 1991-01-03 | 0 | Democrats | 56 | Republicans | 44 | 0 | 0 | 100 | |
| 102-1st-session-1 | 102 | 1st session | 1 | 1991-01-03 | 1992-01-03 | 1991-05-09 | 1 | Democrats | 57 | Republicans | 43 | 0 | 0 | 100 | |
| 102-2nd-session-0 | 102 | 2nd session | 2 | 1992-01-03 | 1992-10-09 | 1992-01-03 | 0 | Democrats | 57 | Republicans | 43 | 0 | 0 | 100 | |
| 103-1st-session-0 | 103 | 1st session | 1 | 1993-01-05 | 1993-11-26 | 1993-01-05 | 0 | Democrats | 57 | Republicans | 43 | 0 | 0 | 100 | |
| 103-1st-session-1 | 103 | 1st session | 1 | 1993-01-05 | 1993-11-26 | 1993-06-14 | 1 | Democrats | 56 | Republicans | 44 | 0 | 0 | 100 | |
| 103-2nd-session-0 | 103 | 2nd session | 2 | 1994-01-25 | 1994-12-01 | 1994-01-25 | 0 | Democrats | 56 | Republicans | 44 | 0 | 0 | 100 | |
| 103-2nd-session-1 | 103 | 2nd session | 2 | 1994-01-25 | 1994-12-01 | 1994-11-09 | 1 | Democrats | 55 | Republicans | 45 | 0 | 0 | 100 | |
| 103-2nd-session-2 | 103 | 2nd session | 2 | 1994-01-25 | 1994-12-01 | 1994-11-17 | 2 | Democrats | 54 | Republicans | 46 | 0 | 0 | 100 | |
| 104-1st-session-0 | 104 | 1st session | 1 | 1995-01-04 | 1996-01-03 | 1995-01-04 | 0 | Republicans | 53 | Democrats | 47 | 0 | 0 | 100 | |
| 104-1st-session-1 | 104 | 1st session | 1 | 1995-01-04 | 1996-01-03 | 1995-03-03 | 1 | Republicans | 54 | Democrats | 46 | 0 | 0 | 100 | |
| 104-1st-session-2 | 104 | 1st session | 1 | 1995-01-04 | 1996-01-03 | 1995-10-01 | 2 | Republicans | 53 | Democrats | 46 | 0 | 1 | 100 | |
| 104-2nd-session-0 | 104 | 2nd session | 2 | 1996-01-03 | 1996-10-04 | 1996-01-03 | 0 | Republicans | 53 | Democrats | 46 | 0 | 1 | 100 | |
| 104-2nd-session-1 | 104 | 2nd session | 2 | 1996-01-03 | 1996-10-04 | 1996-02-06 | 1 | Republicans | 53 | Democrats | 47 | 0 | 0 | 100 | |
| 105-1st-session-0 | 105 | 1st session | 1 | 1997-01-07 | 1997-11-13 | 1997-01-07 | 0 | Republicans | 55 | Democrats | 45 | 0 | 0 | 100 | |
| 105-2nd-session-0 | 105 | 2nd session | 2 | 1998-01-27 | 1998-12-19 | 1998-01-27 | 0 | Republicans | 55 | Democrats | 45 | 0 | 0 | 100 | |
| 106-1st-session-0 | 106 | 1st session | 1 | 1999-01-06 | 1999-11-22 | 1999-01-06 | 0 | Republicans | 55 | Democrats | 45 | 0 | 0 | 100 | |
| 106-2nd-session-0 | 106 | 2nd session | 2 | 2000-01-24 | 2000-12-15 | 2000-01-24 | 0 | Republicans | 55 | Democrats | 45 | 0 | 0 | 100 | |
| 106-2nd-session-1 | 106 | 2nd session | 2 | 2000-01-24 | 2000-12-15 | 2000-07-27 | 1 | Republicans | 54 | Democrats | 46 | 0 | 0 | 100 | |
| 107-1st-session-0 | 107 | 1st session | 1 | 2001-01-03 | 2001-01-20 | 2001-01-03 | 0 | Democrats | 50 | Republicans | 50 | 0 | 0 | 100 | |
| 107-1st-session-2-0 | 107 | 1st session | 1 | 2001-01-20 | 2001-06-06 | 2001-01-20 | 0 | Republicans | 50 | Democrats | 50 | 0 | 0 | 100 | |
| 107-1st-session-3-0 | 107 | 1st session | 1 | 2001-06-06 | 2001-12-20 | 2001-06-06 | 0 | Democrats | 50 | Republicans | 49 | 1 | 0 | 100 | |
| 107-2nd-session-0 | 107 | 2nd session | 2 | 2002-01-23 | 2002-11-22 | 2002-01-23 | 0 | Democrats | 50 | Republicans | 49 | 1 | 0 | 100 | |
| 107-2nd-session-1 | 107 | 2nd session | 2 | 2002-01-23 | 2002-11-22 | 2002-11-12 | 1 | Democrats | 49 | Republicans | 49 | 2 | 0 | 100 | |
| 108-1st-session-0 | 108 | 1st session | 1 | 2003-01-07 | 2003-12-08 | 2003-01-07 | 0 | Republicans | 51 | Democrats | 48 | 1 | 1 Independent | 0 | 100 |
| 108-2nd-session-0 | 108 | 2nd session | 2 | 2004-01-20 | 2004-12-07 | 2004-01-20 | 0 | Republicans | 51 | Democrats | 48 | 1 | 1 Independent | 0 | 100 |
| 109-1st-session-0 | 109 | 1st session | 1 | 2005-01-04 | 2005-12-22 | 2005-01-04 | 0 | Republicans | 55 | Democrats | 44 | 1 | 1 Independent | 0 | 100 |
| 109-2nd-session-0 | 109 | 2nd session | 2 | 2006-01-03 | 2006-12-09 | 2006-01-03 | 0 | Republicans | 55 | Democrats | 44 | 1 | 1 Independent | 0 | 100 |
| 110-1st-session-0 | 110 | 1st session | 1 | 2007-01-04 | 2007-12-31 | 2007-01-04 | 0 | Democrats | 49 | Republicans | 49 | 2 | 1 Independent, 1 Independent Democrat | 0 | 100 |
| 110-2nd-session-0 | 110 | 2nd session | 2 | 2008-01-03 | 2009-01-03 | 2008-01-03 | 0 | Democrats | 49 | Republicans | 49 | 2 | 1 Independent, 1 Independent Democrat | 0 | 100 |
| 111-1st-session-0 | 111 | 1st session | 1 | 2009-01-06 | 2009-12-24 | 2009-01-06 | 0 | Democrats | 56 | Republicans | 41 | 2 | 1 Independent, 1 Independent Democrat | 1 | 100 |
| 111-1st-session-1 | 111 | 1st session | 1 | 2009-01-06 | 2009-12-24 | 2009-04-30 | 1 | Democrats | 57 | Republicans | 40 | 2 | 1 Independent, 1 Independent Democrat | 1 | 100 |
| 111-1st-session-2 | 111 | 1st session | 1 | 2009-01-06 | 2009-12-24 | 2009-07-07 | 2 | Democrats | 58 | Republicans | 40 | 2 | 1 Independent, 1 Independent Democrat | 0 | 100 |
| 111-2nd-session-0 | 111 | 2nd session | 2 | 2010-01-05 | 2010-12-22 | 2010-01-05 | 0 | Democrats | 58 | Republicans | 40 | 2 | 1 Independent, 1 Independent Democrat | 0 | 100 |
| 111-2nd-session-1 | 111 | 2nd session | 2 | 2010-01-05 | 2010-12-22 | 2010-02-04 | 1 | Democrats | 57 | Republicans | 41 | 2 | 1 Independent, 1 Independent Democrat | 0 | 100 |
| 111-2nd-session-2 | 111 | 2nd session | 2 | 2010-01-05 | 2010-12-22 | 2010-11-29 | 2 | Democrats | 56 | Republicans | 42 | 2 | 1 Independent, 1 Independent Democrat | 0 | 100 |
| 112-1st-session-0 | 112 | 1st session | 1 | 2011-01-05 | 2012-01-03 | 2011-01-05 | 0 | Democrats | 51 | Republicans | 47 | 2 | 1 Independent, 1 Independent Democrat | 0 | 100 |
| 112-2nd-session-0 | 112 | 2nd session | 2 | 2012-01-03 | 2013-01-03 | 2012-01-03 | 0 | Democrats | 51 | Republicans | 47 | 2 | 1 Independent, 1 Independent Democrat | 0 | 100 |
| 113-1st-session-0 | 113 | 1st session | 1 | 2013-01-03 | 2014-01-03 | 2013-01-03 | 0 | Democrats | 53 | Republicans | 45 | 2 | 2 Independents | 0 | 100 |
| 113-1st-session-1 | 113 | 1st session | 1 | 2013-01-03 | 2014-01-03 | 2013-06-10 | 1 | Democrats | 52 | Republicans | 46 | 2 | 2 Independents | 0 | 100 |
| 113-1st-session-2 | 113 | 1st session | 1 | 2013-01-03 | 2014-01-03 | 2013-10-31 | 2 | Democrats | 53 | Republicans | 45 | 2 | 2 Independents | 0 | 100 |
| 113-2nd-session-0 | 113 | 2nd session | 2 | 2014-01-03 | 2014-12-16 | 2014-01-03 | 0 | Democrats | 53 | Republicans | 45 | 2 | 2 Independents | 0 | 100 |
| 114-1st-session-0 | 114 | 1st session | 1 | 2015-01-06 | 2015-12-18 | 2015-01-06 | 0 | Republicans | 54 | Democrats | 44 | 2 | 2 Independents | 0 | 100 |
| 114-2nd-session-0 | 114 | 2nd session | 2 | 2016-01-04 | 2017-01-03 | 2016-01-04 | 0 | Republicans | 54 | Democrats | 44 | 2 | 2 Independents | 0 | 100 |
| 115-1st-session-0 | 115 | 1st session | 1 | 2017-01-03 | 2018-01-03 | 2017-01-03 | 0 | Republicans | 52 | Democrats | 46 | 2 | 2 Independents | 0 | 100 |
| 115-2nd-session-0 | 115 | 2nd session | 2 | 2018-01-03 | 2019-01-03 | 2018-01-03 | 0 | Republicans | 51 | Democrats | 47 | 2 | 2 Independents | 0 | 100 |
| 116-1st-session-0 | 116 | 1st session | 1 | 2019-01-03 | 2020-01-03 | 2019-01-03 | 0 | Republicans | 53 | Democrats | 45 | 2 | 2 Independents | 0 | 100 |
| 116-2nd-session-0 | 116 | 2nd session | 2 | 2020-01-03 | 2021-01-03 | 2020-01-03 | 0 | Republicans | 53 | Democrats | 45 | 2 | 2 Independents | 0 | 100 |
| 116-2nd-session-1 | 116 | 2nd session | 2 | 2020-01-03 | 2021-01-03 | 2020-12-02 | 1 | Republicans | 52 | Democrats | 46 | 2 | 2 Independents | 0 | 100 |
| 117-1st-session-0 | 117 | 1st session | 1 | 2021-01-03 | 2021-01-20 | 2021-01-03 | 0 | Republicans | 51 | Democrats | 46 | 2 | 2 Independents | 1 | 100 |
| 117-1st-session-2-0 | 117 | 1st session | 1 | 2021-01-20 | 2022-01-03 | 2021-01-20 | 0 | Democrats | 48 | Republicans | 50 | 2 | 2 Independents | 0 | 100 |
| 117-2nd-session-0 | 117 | 2nd session | 2 | 2022-01-03 | 2023-01-03 | 2022-01-03 | 0 | Democrats | 48 | Republicans | 50 | 2 | 2 Independents | 0 | 100 |
| 118-1st-session-0 | 118 | 1st session | 1 | 2023-01-03 | 2024-01-03 | 2023-01-03 | 0 | Democrats | 48 | Republicans | 49 | 3 | 3 Independents | 0 | 100 |
| 118-2nd-session-0 | 118 | 2nd session | 2 | 2024-01-03 | 2025-01-03 | 2024-01-03 | 0 | Democrats | 48 | Republicans | 49 | 3 | 3 Independents | 100 | |
| 118-2nd-session-1 | 118 | 2nd session | 2 | 2024-01-03 | 2025-01-03 | 2024-05-31 | 1 | Democrats | 47 | Republicans | 49 | 4 | 4 Independents | 0 | 100 |
| 119-1st-session-0 | 119 | 1st session | 1 | 2025-01-03 | 2026-01-03 | 2025-01-03 | 0 | Republicans | 53 | Democrats | 45 | 2 | 2 Independents | 0 | 100 |
| 119-2nd-session-0 | 119 | 2nd session | 2 | 2026-01-03 | 2026-01-03 | 0 | Republicans | 53 | Democrats | 45 | 2 | 2 Independents | 0 | 100 |