Oscar A. Swenson (March 27, 1877 – June 20, 1951) was a Minnesota politician and a Speaker of the Minnesota House of Representatives. He served two decades in the Minnesota House of Representatives, and another 14 years in the Minnesota Senate. Oscar A. Swenson born in New Sweden Township, Minnesota to Norwegian immigrant parents. His father, Swen Swenson, (1836–1905) was a Minnesota State Representative. His brother Laurits S. Swenson served as an American ambassador.