Founded in 1840, Montmorency County is one of 83 counties in the state of Michigan. Historically, Montmorency County was formed from part of Mackinac County and unorganized territory which was named Cheonoquet County until 1843. The city of Atlanta is the county seat. With FIPS code of 119, Montmorency County has a population of 9,297 and area of 562 square miles (1,456 km2).
List of all cities in Montmorency County, MI alphabetically
| City/Town | Postal Code | Area Code |
| Atlanta, MI | 49709 | 989 |
| Hillman, MI | 49746 | 989 |
| Lewiston, MI | 49756 | 989 |