Bloomfield is an unincorporated community in Dawson County, Montana, United States. It is located 23 miles (37 km) northeast of the Yellowstone River and the city of Glendive, which is the county seat for Dawson County. Bloomfield is inside area code 406 and has a post office with ZIP code 59315. The population of the community was 6 at the 2020 census.