Koopman is a Dutch surname which means "merchant". Notable people with the surname include:
Bernard Koopman (1900–1981), American mathematicianBram Koopman (1917–2008), Dutch politicianCaia Koopman (born 1968), American pop surrealism artistToto Koopman (1908–1991), Dutch/English spy and modelElias Bernard Koopman (1860–1929), founder of the American Mutoscope and Biograph CompanyElisabetha Koopman Hevelius (1647–1693), German astronomerMartin Koopman (born 1956), Dutch football (soccer) player and managerPim Koopman (born 1953), Dutch musician and member of KayakTon Koopman (born 1944), Dutch musician