SS St. Olaf was a Liberty ship built in the United States during World War II.

He was posthumously given the title Rex Perpetuus Norvegiae (English: Eternal/Perpetual King of Norway) and canonised at Nidaros, by Bishop Grimkell, one year after his death in the Battle of Stiklestad.

St. Olaf was laid down on 6 January 1942, under a Maritime Commission (MARCOM) contract, MCE hull 33, by the Bethlehem-Fairfield Shipyard, Baltimore, Maryland; and was launched on 12 April 1942.

[4] On 22 November 1943, she was purchased by the United States Department of War to be converted to a hospital ship.

[5] She was refit at Standard Shipbuilding Co., San Pedro, California, to a transport ship, for returning military personnel and their dependents from Alaska, to Seattle, Washington.