Aucoin is a surname of French Belgian origin. Notable people with the surname include:
Adrian Aucoin (born 1973), Canadian ice hockey player Bill Aucoin (1943–2010), American band manager Derek Aucoin (born 1970), Canadian baseball pitcher Hubert Meen Aucoin (1874–1952), Canadian politician Vice Admiral Joseph Aucoin, United States Navy, formerly Commander of the 7th Fleet Keith Aucoin (born 1978), American ice hockey player Kelly AuCoin, American actor Kevyn Aucoin (1962–2002), American make-up artist and photographer Les AuCoin (born 1942), United States Congressman from Oregon Louis M. Aucoin, United Nations Secretary-General Deputy Special Representative for Liberia Matthew Aucoin (born 1990), American composer, conductor, pianist and writer Peter Aucoin (1943–2011), professor Rich Aucoin, Canadian indie rock musician