Cousineau is a surname. Notable people with the surname include:
Claude Cousineau (born 1950), Canadian politician Guy Cousineau (born 1937), Canadian politician Léa Cousineau, Canadian politician Marcel Cousineau (born 1973), Canadian ice hockey player Marie-Hélène Cousineau, Canadian film director and producer Philémon Cousineau (1874–1959), Canadian politician Phil Cousineau (born 1952), American author, screenwriter and filmmaker René Cousineau (1930–2002), Canadian politician Tom Cousineau (born 1957), American pro football player Tony Cousineau, American professional poker player