Koopman is a Dutch surname which means "merchant". Notable people with the surname include:
Bernard Koopman (1900–1981), American mathematician
Bram Koopman (1917–2008), Dutch politician
Caia Koopman (born 1968), American pop surrealism artist
Toto Koopman (1908–1991), Dutch/English spy and model
Elias Bernard Koopman (1860–1929), founder of the American Mutoscope and Biograph Company
Elisabetha Koopman Hevelius (1647–1693), German astronomer
Martin Koopman (born 1956), Dutch football (soccer) player and manager
Pim Koopman (born 1953), Dutch musician and member of Kayak
Ton Koopman (born 1944), Dutch musician
