Calvin is a surname. Notable people with the surname include:
Henry Calvin (1918-1975), American comic actor
Hiram Augustus Calvin (1841–1932), Canadian businessman and politician
John Calvin (1509-1564), theologian, founder of Calvinism
Idelette Calvin (died 1549), wife of John Calvin
Kathy Calvin (born 1949), chief executive officer of the United Nations Foundation
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 (born 1926), former National Football League halfback
William H. Calvin (born 1939), American neurophysiologist
Wyn Calvin (born 1926), Welsh comedian and entertainer
