Champlin is a surname. Notable people with the surname include:
Arthur B. Champlin (1858–?), American journalist and politician Bill Champlin (born 1947), American rock musician Charles Champlin (1926–2014), American film critic and writer Christopher G. Champlin (1768–1840), United States Senator from Rhode Island Daniel Champlin (1769–1832), justice of the Rhode Island Supreme Court Donna Lynne Champlin (born 1971), American actress and dancer Edward Champlin (1948–2024), Classics professor at Princeton University Ezra T. Champlin (1839–1928), American politician Hallie Champlin, 1900 US national tennis champion in women's doubles John W. Champlin (1831–1901), member of the Michigan Supreme Court, law professor and mayor of Grand Rapids Joseph M. Champlin (1930–2008), Roman Catholic priest and author Stephen Champlin (1789–1870), United States Navy officer during the War of 1812 Stephen G. Champlin (1827–1864), American physician, lawyer, judge and Union Army general William A. Champlin, American politician from Mississippi Zachary T. Champlin (1847–1924), American politician from Mississippi and son of the above