Warren is an unincorporated community in Carbon County, Montana, United States at 45°03′36″N 108°39′30″W / 45.06°N 108.65833°WCoordinates: 45°03′36″N 108°39′30″W / 45.06°N 108.65833°W, elevation 4,419 feet (1,347 m).
Warren started as an agricultural town north of the Montana–Wyoming border. Today Warren relies on a large limestone quarry and processing industry. A post office operated in Warren from 1911 to 1953. A majority of the original town structures no longer exist. However, a number of modern buildings and residences are in and around the Warren area.