USS Pioneer

{{Italic title prefixed|3}}

USS Pioneer may refer to:

• {{USS|Pioneer|1836}}, 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.
• {{USS|Pioneer|MSF-105}}, a World War II minesweeper commissioned in 1942 and sold to Mexico in 1973 as Leandro Valle
• {{USS|Pioneer|MCM-9}}, is an {{sclass|Avenger|mine countermeasures ship}} currently in service.