Poutiainen is a Finnish surname. Notable people with the surname include:
Matti Poutiainen (1864–1929), Finnish politician Ari Poutiainen (born 1972), Finnish musician Tanja Poutiainen (born 1980), Finnish skier Patrick Poutiainen (born 1991), Finnish footballer Pertti Poutiainen (1952–1978), Finnish chess master