Calvin is a surname made notable by John Calvin, theologian, Protestant reformer and proponent of Calvinism. Notable people with the surname include:
Henry Calvin (1918–1975), American comic actor Hiram Augustus Calvin (1841–1932), Canadian businessman and politician Idelette Calvin (died 1549), wife of John Calvin Ivy Calvin (born 1971), American former football player and TV personality Katherine Calvin (born in the 1980s), American earth scientist Kathy Calvin (born 1949), chief executive officer of the United Nations Foundation Linda Gist Calvin, American businesswoman and 41st President General of the Daughters of the American Revolution Melvin Calvin (1911–1997), American chemist; discoverer of the Calvin Cycle (see below) Samuel Calvin (1811–1890), Whig member of the U.S. House of Representatives from Pennsylvania Samuel Calvin (geologist) (1840–1911), American geologist Tom Calvin (1926–2020), former National Football League halfback William H. Calvin (born 1939), American neurophysiologist Wyn Calvin (1925–2022), Welsh comedian and entertainer