Stassen is a surname that occurs mainly in Belgium, Germany, and the Netherlands, but whose owners' descendants have migrated all over the world. It may refer to:
Ben Stassen (contemporary), Belgian film director and producerFranz Stassen (1869–1949), German painter and illustratorGlen Stassen (1936-2014), American ethicist, professor, and Baptist theologianHarold Stassen (1907–2001), American politician from Minnesota; governor of Minnesota 1939–43; perennial candidate for U.S. presidentHenk G. Stassen (1935-2011), Dutch biomechanical engineer and Professor at the Delft University of TechnologyJean-Philippe Stassen (b. 1966), Belgian comic book artistJean Marie Stassen (b. 1953), Belgian scientistJ. Robert Stassen (1927-2015), American politician; Minnesota state senator (1973-1976)Laurence Stassen (b. 1971), Dutch politician