USS Saint Croix River (LSM(R)-524) was a Rocket-equipped Landing Ship of the United States Navy during World War II. Saint Croix River was laid down a few days before the end of the Second World War on 5 May 1945. Build in Houston, Texas, the Saint Croix River was launched on 9 June, and initially commissioned on 14 August as USS LSMR-524 before being awarded the name of the St. Croix River between Maine and Canadian New Brunswick in 1955. Despite earning the American and World War II campaign decorations, the Saint Croix River never saw action nor traveled further than Chesapeake Bay or the Gulf Coast of the United States, and was sold in 1961, with its subsequent fate unknown to the US Navy.