Sanders is an unincorporated community in northeastern Treasure County, Montana, United States, along the Yellowstone River. It lies along local roads east of the town of Hysham, the county seat of Treasure County. Its elevation is 2,602 feet (793 m). Sanders' post office first opened on 1904-03-30 and closed on 1905-10-14, only to be reopened on 1906-12-01. Although the post office finally closed on 1994-07-29, the community still has a separate ZIP code of 59076.
According to the Köppen Climate Classification system, Sanders has a semi-arid climate, abbreviated "BSk" on climate maps.