Coplan is a surname. Notable people with the surname include:
Francis Coplan, fictional character Maxwell Frederic Coplan (1912–1985), American photographer Shayne Coplan (born 1998), American billionaire technologist, Polymarket William F. Coplan (c. 1795–?), American politician
See also John Coplans (1920–2003), British artist, art writer, curator, and museum director