Founded in 1840, Otsego County is one of 83 counties in the state of Michigan. Historically, Otsego County was formed from part of Mackinac County which was named Okkudo County until 1843. The city of Gaylord is the county seat. With FIPS code of 137, Otsego County has a population of 25,289 and area of 526 square miles (1,362 km2).
List of all cities in Otsego County, MI alphabetically
| City/Town | Postal Code | Area Code |
| Elmira, MI | 49730 | 231 |
| Gaylord, MI | 49734 | 989 |
| 49735 | 989 | |
| Johannesburg, MI | 49751 | 989 |
| Treetops, MI | 49735 | 989 |
| Treetops Village, MI | 49735 | 989 |
| Vanderbilt, MI | 49795 | 989 |
| Waters, MI | 49797 | 989 |