Cloutier is a French occupational name for a nailer, i.e. someone who made and sold nails, from an agent derivative of clou (Latin clavus) for "nail".
As a surname it may refer to:
Alexandre Cloutier (born 1977), Canadian politician
Claude Cloutier (born 1957), a Quebec film animator and graphic novel artist
Dan Cloutier (born 1976), Canadian ice hockey player
Gilles Cloutier (1928–2014), Canadian scientist
Gary Cloutier (born 1962), American politician
Guy Cloutier (born 1940), Canadian producer, convicted sex offender
Guylaine Cloutier (born 1969), Canadian international swimmer
Jacques Cloutier (born 1960), Canadian ice hockey player
Jeremiah Cloutier, fictional character in the TV series Oz
Kim Cloutier (born 1987), Canadian model
Patrick Cloutier (born 1970), a Canadian soldier who became famous during the 1990 Oka Crisis
Réal Cloutier (born 1956), Canadian ice hockey player
T. J. Cloutier (born 1939), American professional poker player
Sheila Watt-Cloutier (born 1953), Canadian Inuit activist
Suzanne Cloutier (1927–2003), Canadian film actress
Véronique Cloutier (born 1974), French Canadian TV and radio personality
Zacharie Cloutier (c.1590–1677), one of the founders of Beauport, Quebec.
Cloutier may also refer to:
Cloutier (style agency), American styling agency
St-Alphonse/Lac Cloutier Water Aerodrome, Quebec, Canada