Marvin E. Christianson Sr. (January 12, 1928 – March 8, 1969) was an American farmer and politician.
Born in Halstad, Minnesota, Christianson graduated from Halstad High School and was a dairy farmer and cattle dealer.
Christianson served in the Minnesota House of Representatives as a Democrat from 1967 until his death in 1969.
Christianson died of cancer at a hospital in Minneapolis, Minnesota.
His wife Donna Jean Christianson succeeded her husband in a special election to the Minnesota House of Representatives.