Founded on Jan 15, 1851, Calhoun County is one of 99 counties in the state of Iowa. Historically, Calhoun County was formed from Fox County (renamed). The city of Rockwell City is the county seat. With FIPS code of 25, Calhoun County has a population of 9,915 and area of 570 square miles (1,476 km2).
List of all cities in Calhoun County, IA alphabetically
| City/Town | Postal Code | Area Code |
| Farnhamville, IA | 50538 | 515 |
| Jolley, IA | 50551 | 712 |
| Knierim, IA | 50552 | 515 |
| Knoke, IA | 50575 | 712 |
| Lake City, IA | 51449 | 712 |
| Lanedale, IA | 50579 | 712 |
| Lavinia, IA | 50579 | 712 |
| Lohrville, IA | 51453 | 712 |
| Lytton, IA | 50561 | 712 |
| Manson, IA | 50563 | 712 |
| Piper, IA | 50579 | 712 |
| Pomeroy, IA | 50575 | 712 |
| Rands, IA | 50579 | 712 |
| Richards, IA | 50579 | 712 |
| Rinard, IA | 50538 | 515 |
| Rockwell City, IA | 50579 | 712 |
| Sherwood, IA | 50579 | 712 |
| Somers, IA | 50586 | 515 |
| Wieston, IA | 50563 | 712 |