Poulin is a surname, and may refer to:
- Alfred Poulin (1938–1996), American poet and translator (e.g. Rilke)
- Bernard Poulin (born 1945), Canadian visual artist
- Charles Poulin (born 1972), Canadian ice hockey player
- Dave Poulin (born 1958), Canadian ice hockey player
- François Poulin de Francheville (1692–1733), Montreal merchant
- Georges Poulin (1887–1971), Canadian ice hockey player
- Jacques Poulin (born 1937), Canadian novelist
- Joseph-Napoléon Poulin (1821–1892), French physician and political figure
- Kevin Poulin (born 1990), Canadian ice hockey player
- Marie-Paule Poulin (born 1945), Canadian senator and President of the Liberal Party of Canada
- Marie-Philip Poulin (born 1991), Canadian women's ice hockey player
- Mike Poulin (born 1985), Canadian lacrosse player
- Patrick Poulin (born 1973), Canadian ice hockey player
- Robert Poulin (born 1963), Canadian evolutionary biologist