Brassard is a surname. It may have derived from brassard, an armband used as an item of military uniform. Notable individuals with the surname include:
Augustin Brassard (born 1922), Canadian politician
Derick Brassard (born 1987), Canadian ice hockey player
François Brassard (1908–1976), Canadian musician
Gilles Brassard, Canadian computer scientist
Fernando Brassard, (born 1971), former Portuguese footballer
Jacques Brassard (born 1940), Canadian politician
Jean-Luc Brassard (born 1972), Canadian freestyle skier
Pierre Brassard (born 1966), Canadian actor
Roy Brassard (1930–2008), Canadian politician
Vincent Brassard (born 1919), Canadian politician
