SS Alexander Macomb was a Liberty ship of the United States Merchant Marine during World War II. Construction began on Hull 2023 on 18 February 1942 at the Bethlehem-Fairfield Shipyard of the Bethlehem Shipbuilding Corporation in Baltimore, Maryland, under Maritime Commission contract 0036. See, List of Liberty ships: M-R. The ship was launched on 6 May, and her sea trials were completed on 2 June.