Founded on Jan 15, 1851, Monona County is one of 99 counties in the state of Iowa. Historically, Monona County was formed from Harrison County. The city of Onawa is the county seat. With FIPS code of 133, Monona County has a population of 8,574 and area of 693 square miles (1,795 km2).
List of all cities in Monona County, IA alphabetically
| City/Town | Postal Code | Area Code |
| Berne, IA | 51060 | 712 |
| Blencoe, IA | 51523 | 712 |
| Castana, IA | 51010 | 712 |
| Mapleton, IA | 51034 | 712 |
| Moorhead, IA | 51558 | 712 |
| Onawa, IA | 51040 | 712 |
| Rodney, IA | 51051 | 712 |
| Soldier, IA | 51572 | 712 |
| Ticonic, IA | 51010 | 712 |
| Turin, IA | 51040 | 712 |
| Ute, IA | 51060 | 712 |
| Whiting, IA | 51063 | 712 |