Towns
| State | City/Town | Town Title |
|---|---|---|
| Iowa | Conesville | Conesville, IA |
| Iowa | Conrad | Conrad, IA |
| Iowa | Conroy | Conroy, IA |
| Iowa | Coon Rapids | Coon Rapids, IA |
| Iowa | Cooper | Cooper, IA |
| Iowa | Coralville | Coralville, IA |
| Iowa | Corning | Corning, IA |
| Iowa | Correctionville | Correctionville, IA |
| Iowa | Corwith | Corwith, IA |
| Iowa | Corydon | Corydon, IA |
| Iowa | Coulter | Coulter, IA |
| Iowa | Council Bluffs | Council Bluffs, IA |
| Iowa | Crawfordsville | Crawfordsville, IA |
| Iowa | Crescent | Crescent, IA |
| Iowa | Cresco | Cresco, IA |
| Iowa | Creston | Creston, IA |
| Iowa | Cromwell | Cromwell, IA |
| Iowa | Crystal Lake | Crystal Lake, IA |
| Iowa | Cumberland | Cumberland, IA |
| Iowa | Cumming | Cumming, IA |
| Iowa | Curlew | Curlew, IA |
| Iowa | Cushing | Cushing, IA |
| Iowa | Cylinder | Cylinder, IA |
| Iowa | Dakota City | Dakota City, IA |
| Iowa | Dallas | Dallas, IA |