SS Star of Oregon (MC hull number 171) was a liberty ship built by the Oregon Shipbuilding Company of Portland, Oregon, and launched on 27 September 1941, the first of the 472 ships built by the company up to November 1945. The ship was operated by the States Steamship Company of Portland, under contract from the War Shipping Administration (WSA). On 30 August 1942 she was torpedoed and sunk by north-east of Tobago at position .