Founded in 1853, Blue Earth County is one of 87 counties in the state of Minnesota. Historically, Blue Earth County was formed from unorganized Territory and Dakota County. The city of Mankato is the county seat. With FIPS code of 13, Blue Earth County has a population of 69,280 and area of 752.36 square miles (1,949 km2).
List of all cities in Blue Earth County, MN alphabetically
| City/Town | Postal Code | Area Code |
| Amboy, MN | 56010 | 507 |
| Eagle Lake, MN | 56024 | 507 |
| Garden City, MN | 56034 | 507 |
| Good Thunder, MN | 56037 | 507 |
| Lake Crystal, MN | 56055 | 507 |
| Madison Lake, MN | 56063 | 507 |
| Mankato, MN | 56001 | 507 |
| 56002 | 507 | |
| 56006 | 507 | |
| Mapleton, MN | 56065 | 507 |
| North Mankato, MN | 56002 | 507 |
| 56055 | 507 | |
| Pemberton, MN | 56078 | 507 |
| Saint Clair, MN | 56080 | 507 |
| Vernon Center, MN | 56090 | 507 |