Oscar S. Paulson (December 12, 1889- ) was an American Lutheran minister who served in the Wisconsin State Senate.
Paulson was born near Dalton in Otter Tail County, Minnesota. Paulson graduated from Augsburg College and was ordained in the Lutheran ministry, He became a Lutheran pastor in La Crosse, Wisconsin in 1916. In 1930, he became President of the Minneapolis District of the Lutheran Free Church.
Paulson was a member of the Senate from 1937 to 1940. He was a member of the Wisconsin Progressive Party.