Kossmann or Koßmann is a German surname. Notable people with the surname include:
Alfred Kossmann (1922–1998), Dutch poet and prose writer Ernst Kossmann (1922–2003), Dutch historian and twin brother of Alfred Hans Kossmann (born 1962), Canadian-Swiss professional ice hockey coach Hans Kossmann (alpine skier) (born 1965), Chilean alpine skier Karl-Richard Koßmann (1896–1969), German general Kurt Kossmann (born 1966), American professional race car driver Maarten Kossmann (born 1966), Dutch linguist and professor Martín Vidaurre Kossmann (born 2000), Chilean cross-country mountain biker Nina Kossman, Russian-American writer Reiner Kossmann (1927–2013), German ice hockey player Yvette Kosmann-Schwarzbach (born 1941), French mathematician and professor
See also Kosman, a village in the municipality of Foča, Bosnia and Herzegovina Kosman (surname) Cossmann Cosman