Founded in February 11, 1901, Rosebud County is one of 56 counties in the state of Montana. Historically, Rosebud County was formed from Custer County. The city of Forsyth is the county seat. With FIPS code of 87, Rosebud County has a population of 8,124 and area of 5,012 square miles (12,981 km2).
List of all cities in Rosebud County, MT alphabetically
| City/Town | Postal Code | Area Code |
| Angela, MT | 59312 | 406 |
| Ashland, MT | 59003 | 406 |
| 59004 | 406 | |
| Birney, MT | 59012 | 406 |
| Colstrip, MT | 59323 | 406 |
| Forsyth, MT | 59327 | 406 |
| Hathaway, MT | 59333 | 406 |
| Ingomar, MT | 59039 | 406 |
| Lame Deer, MT | 59043 | 406 |
| Rosebud, MT | 59347 | 406 |
| Saint Labre Mission, MT | 59004 | 406 |
| Sumatra, MT | 59083 | 406 |