For the Swedish track and field athlete, see Gustav Möller (athlete); for the American painter, see Gustave Moeller.
Gustav Möller (1884–1970) was a prominent Swedish Social democratic politician, credited as the father of the social security system and the Welfare state, also called Folkhemmet.
He was a Member of Parliament in 1918-1954 and Member of the Government in 1924-26, 1932–36 and 1936-51.