High Quality Content by WIKIPEDIA articles! USS Dunn County (LST-742) was an LST-542-class tank landing ship built for the United States Navy during World War II. Named after counties in North Dakota and Wisconsin, she was the only U.S. Naval vessel to bear the name. LST-742 was laid down on 12 March 1944 at Pittsburgh, Pennsylvania by the Dravo Corporation of Neville Island; launched on 22 April 1944; sponsored by Mrs. Harry Lester; and commissioned on 23 May 1944 with Lieutenant Warren W. Holmes, USNR, in command.