USS Pioneer may refer to: , a nineteenth-century barque. USS Pioneer (1862), may refer to a scuttled Confederate States Navy submarine raised by Union troops or may refer to the Bayou St. John submarine which was for decades misidentified as the Pioneer. , a World War II minesweeper commissioned in 1942 and sold to Mexico in 1973 as Leandro Valle , is an currently in service. See also , the name of more than one ship of the United States Coast and Geodetic Survey. United States Navy ship names