Founded on Jan 15, 1851, Mills County is one of 99 counties in the state of Iowa. Historically, Mills County was formed from Pottawattamie County. The city of Glenwood is the county seat. With FIPS code of 129, Mills County has a population of 14,465 and area of 437 square miles (1,132 km2).
List of all cities in Mills County, IA alphabetically
| City/Town | Postal Code | Area Code |
| Emerson, IA | 51533 | 712 |
| Glenwood, IA | 51534 | 712 |
| Hastings, IA | 51540 | 712 |
| Henderson, IA | 51541 | 712 |
| Malvern, IA | 51551 | 712 |
| Mineola, IA | 51554 | 712 |
| Pacific Junction, IA | 51561 | 712 |
| Silver City, IA | 51571 | 712 |