Steinhardt is a surname of German origin. Notable people with the surname include: Adam Steinhardt (1969–2025), Australian pole vaulter Arnold Steinhardt (born 1937), American concert violinist Géza Steinhardt (1873–1944), Hungarian actor Jacob Steinhardt (1887–1968), German painter and woodcut artist Joseph Steinhardt (1720–1776), German rabbi and Talmud scholar Laurence Steinhardt (1892–1950), American diplomat; U.S. ambassador to several countries, including the USSR Michael Steinhardt (born 1941), American financial manager and philanthropist Nicolae Steinhardt (1912–1989), Romanian writer, Orthodox Christian hermit and father confessor Paul Steinhardt (born 1952), American theoretical physicist and professor Robby Steinhardt (1950–2021), American rock musician and singer