Powderville is an unincorporated community in northeastern Powder River County, Montana, United States, along the Powder River. It lies along local roads northeast of the town of Broadus, the county seat of Powder River County. Its elevation is 2,828 feet (862 m), and it is located at 45°45′32″N 105°6′55″W / 45.75889°N 105.11528°W / 45.75889; -105.11528 (45.7588870, -105.1152542). Although Powderville is unincorporated, it has a post office, with the ZIP code of 59345.