Blumenthal is a surname of German origin, meaning: "flower valley" in German. It may be either an ornamental surname or derived from a place named Blumenthal. Spelling variant: Blumental. Notable people with the surname include:Albert H. Blumenthal (1928–1984), New York politician
Alfred Cleveland Blumenthal (1885–1957), American theatrical producer and real estate developer
Antje Blumenthal, German politician
Bartolomé Blumenthal (1511–1585), supposedly the first German to arrive in Chile
Casimir von Blumenthal (1787–1849), Belgian violinist and conductor who worked in Switzerland
Daniel Blumenthal (1860–1930), French politician
Daniel Blumenthal, German-born American pianist
Florence Meyer Blumenthal (1875–1930), American philanthropist, underwrote the Prix Blumenthal
Georg von Blumenthal (1490–1550), German Prince-Bishop and Bishop
George Blumenthal (banker) (1858–1941), German-born banker
George R. Blumenthal, American astrophysicist, astronomer, professor, and academic administrator
Gerda Blumenthal (1923–2004), German-American literary scholar
Hans-Jürgen von Blumenthal (1907–1944), German aristocrat and army officer
Herman A. Blumenthal (1916–1986), American art director and production designer for films
Hermann Blumenthal (1905–1942), German sculptor and posthum participating in the documenta 1
Heston Blumenthal, British chef and owner of The Fat Duck restaurant
Howard Blumenthal, American television and media producer, author, educator, and executive
Jacques Blumenthal (1829–1908), German pianist and composer
Joachim Friedrich von Blumenthal (1609–1657), German nobleman, diplomat, founder of the early Brandenburg-Prussian Army
Joseph Blumenthal, main character in the novel The Hope by Herman Wouk
Joseph Blumenthal (1897–1990), American printer and typographer
Joseph von Blumenthal (1782–1856), Belgian violinist and composer
Josip Mikoczy-Blumenthal (1734–1800), Croatian historian
Karen Blumenthal (1959–2020), American business journalist and educator
Leonard Blumenthal (1901–1986), American mathematician
Leonhard Graf von Blumenthal (1810–1900), Prussian field marshal
Morton J. Blumenthal (1931–2022), American lawyer and politician
Mark Blumenthal (1831–1921), German-American physician
Max Blumenthal, American journalist
Naomi Blumenthal, former Israeli politician
Naftali Blumenthal (1922–2022), former Israeli politician
Nathan Blumenthal (1930–2014), birth name of Nathaniel Branden, Canadian psychotherapist and writer
Oscar Blumenthal (1852–1917), German writer, critic, and chess player
Otto Blumenthal (1876–1944), German mathematician
Richard Blumenthal, Democratic U. S. Senator from the state of Connecticut, elected 2010
Robert Blumenthal (microbiologist), American microbiologist
Robert McCallum Blumenthal (1931–2012), mathematician, known for Blumenthal's zero–one law
Roy Blumenthal, South African poet
Sidney Blumenthal, American journalist; advisor to Bill and Hillary Clinton
Uta-Renate Blumenthal (1935–2025), German-born American medievalist and expert on canon law history
Vera von Blumenthal, contributed to the development of the Pueblo Indian pottery
W. Michael Blumenthal, U.S. business executive and Treasury Secretary
Wolfgang Charles Werner von Blumenthal (1918–2009), birth name of Charles Arnold-Baker, English barrister, academic and historian