Founded in February 2, 1865, Beaverhead County is one of 56 counties in the state of Montana. Historically, Beaverhead County was one of the 9 original counties. The city of Dillon is the county seat. With FIPS code of 1, Beaverhead County has a population of 9,524 and area of 5,543 square miles (14,356 km2).
List of all cities in Beaverhead County, MT alphabetically
| City/Town | Postal Code | Area Code |
| Dell, MT | 59724 | 406 |
| Dillon, MT | 59725 | 406 |
| Glen, MT | 59732 | 406 |
| Grant, MT | 59725 | 406 |
| Jackson, MT | 59736 | 406 |
| Lima, MT | 59739 | 406 |
| Polaris, MT | 59746 | 406 |
| Wisdom, MT | 59761 | 406 |
| Wise River, MT | 59762 | 406 |