High Quality Content by WIKIPEDIA articles! USS Sedgwick County (LST-1123) was an LST-542-class tank landing ship in the United States Navy. Unlike many of her class, which received only numbers and were disposed of after World War II, she survived long enough to be named. On 1 July 1955, all LSTs still in commission were named for US counties or parishes; LST-1123 was given the name Sedgwick County, after counties in Colorado and Kansas.