Founded in 1840, Roscommon County is one of 83 counties in the state of Michigan. Historically, Roscommon County was formed from part of Mackinac County and unorganized territory which was named Mikenauk County until 1843. The city of Roscommon is the county seat. With FIPS code of 143, Roscommon County has a population of 23,633 and area of 580 square miles (1,502 km2).
List of all cities in Roscommon County, MI alphabetically
| City/Town | Postal Code | Area Code |
| Hghtn Lk Heights, MI | 48630 | 989 |
| Higgins Lake, MI | 48627 | 989 |
| Houghton Lake, MI | 48629 | 989 |
| Houghton Lake Heights, MI | 48630 | 989 |
| Prudenville, MI | 48651 | 989 |
| Roscommon, MI | 48653 | 989 |
| Saint Helen, MI | 48656 | 989 |