Founded in October 4, 1920, Golden Valley County is one of 56 counties in the state of Montana. Historically, Golden Valley County was formed from Musselshell County and Sweet Grass County. The city of Ryegate is the county seat. With FIPS code of 37, Golden Valley County has a population of 831 and area of 1,175 square miles (3,043 km2).
List of all cities in Golden Valley County, MT alphabetically
| City/Town | Postal Code | Area Code |
| Belmont, MT | 59046 | 406 |
| Cushman, MT | 59046 | 406 |
| Lavina, MT | 59046 | 406 |
| Ryegate, MT | 59074 | 406 |