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
• 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

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