Founded in 1831, Clinton County is one of 83 counties in the state of Michigan. Historically, Clinton County was formed from unorganized territory. The city of St. Johns is the county seat. With FIPS code of 37, Clinton County has a population of 79,426 and area of 575 square miles (1,489 km2).
List of all cities in Clinton County, MI alphabetically
| City/Town | Postal Code | Area Code |
| Bath, MI | 48808 | 517 |
| Carland, MI | 48831 | 989 |
| De Witt, MI | 48820 | 517 |
| Dewitt, MI | 48820 | 517 |
| Eagle, MI | 48822 | 517 |
| Elsie, MI | 48831 | 989 |
| Eureka, MI | 48833 | 989 |
| Fowler, MI | 48835 | 989 |
| Lansing, MI | 48906 | 517 |
| Maple Rapids, MI | 48853 | 989 |
| Ovid, MI | 48866 | 989 |
| Saint Johns, MI | 48879 | 989 |
| Westphalia, MI | 48894 | 989 |