Oregon Shipbuilding Corporation was a World War II emergency shipyard located in Portland, Oregon, United States, that built over 1000 Liberty and Victory ships between 1941 and 1945. It was closed after the war ended. The shipyard, one of three Kaiser Shipyards in the area, was in St. Johns. The second, also known as Swan Island Shipyard, was located on Swan Island and the third was across the Columbia River from Portland in Vancouver, Washington. Among the ships built by Oregon Shipbuilding was the Star of Oregon, which was launched on Liberty Fleet Day, September 27, 1941.