Guertin is a surname. Notable people with the surname include:
Aimé Guertin (1898–1970), Canadian politician and businessman Carolyn A. Guertin (1928–2020), American member of the Civil Air Patrol Carolyn Guertin, Canadian artist and writer George Albert Guertin (1869–1931), American Roman Catholic bishop Kenneth Guertin (born 1966), American film director, screenwriter, producer and editor M. K. Guertin (1891–1970), American hotel chain founder Philippe Guertin (born 1991), Canadian long-distance swimmer Robbie Guertin, American indie rock musician Heather Guertin, American Abstract painter