USS St. Mary's River (LSM(R)-528) was originally authorized as LSM-528. Reclassified LSM(R)-528 on 21 April 1945, she was laid down on 19 May 1945 at the Brown Shipbuilding Co., Inc., Houston, Texas, launched on 16 June 1945, and commissioned on 2 September 1945, Lieutenant Norman E. Wallin, USNR, in command.