Grassmann, Graßmann or Grassman is a German surname. Notable people with the surname include:
Grassmann Dietrich Graßmann (1920–1991), German Luftwaffe pilot Hans Grassmann (born 1960), German physicist Hermann Grassmann (1809–1877), German linguist, physicist, and mathematician (sometimes misspelled Grassman) Justus Grassmann (died 1961), German World War I flying ace Marcelo Grassmann (1925–2013), Brazilian engraver and draughtsman Thomas Grassmann (1890–1970), American historian and archaeologist
Grassman Edward Grassman (1882–1952), American politician
See also
Grossmann (surname)