Towns
| State | City/Town | Town Title |
|---|---|---|
| Iowa | Clarinda | Clarinda, IA |
| Iowa | Clarion | Clarion, IA |
| Iowa | Clarksville | Clarksville, IA |
| Iowa | Clear Lake | Clear Lake, IA |
| Iowa | Clearfield | Clearfield, IA |
| Iowa | Cleghorn | Cleghorn, IA |
| Iowa | Clemons | Clemons, IA |
| Iowa | Clermont | Clermont, IA |
| Iowa | Climbing Hill | Climbing Hill, IA |
| Iowa | Clinton | Clinton, IA |
| Iowa | Clio | Clio, IA |
| Iowa | Clive | Clive, IA |
| Iowa | Cloud | Cloud, IA |
| Iowa | Clutier | Clutier, IA |
| Iowa | Coggon | Coggon, IA |
| Iowa | Coin | Coin, IA |
| Iowa | Colesburg | Colesburg, IA |
| Iowa | Colfax | Colfax, IA |
| Iowa | College Springs | College Springs, IA |
| Iowa | Collins | Collins, IA |
| Iowa | Colo | Colo, IA |
| Iowa | Columbia | Columbia, IA |
| Iowa | Columbus City | Columbus City, IA |
| Iowa | Columbus Junction | Columbus Junction, IA |
| Iowa | Colwell | Colwell, IA |