Weston is an unincorporated community in northern Campbell County, Wyoming, United States, along the upper Little Powder River on the southeastern edge of the Thunder Basin National Grassland. It lies along WYO 59 north of the city of Gillette, the county seat of Campbell County. Its elevation is 3,802 feet (1,159 m). Although Weston is unincorporated, it has a post office, with the ZIP code of 82731.