Towns
| State | City/Town | Town Title |
|---|---|---|
| Ohio | Carbondale | Carbondale, OH |
| Ohio | Cardington | Cardington, OH |
| Ohio | Carey | Carey, OH |
| Ohio | Carroll | Carroll, OH |
| Ohio | Carrollton | Carrollton, OH |
| Ohio | Casstown | Casstown, OH |
| Ohio | Castalia | Castalia, OH |
| Ohio | Catawba | Catawba, OH |
| Ohio | Cecil | Cecil, OH |
| Ohio | Cedarville | Cedarville, OH |
| Ohio | Celina | Celina, OH |
| Ohio | Centerburg | Centerburg, OH |
| Ohio | Chagrin Falls | Chagrin Falls, OH |
| Ohio | Chandlersville | Chandlersville, OH |
| Ohio | Chardon | Chardon, OH |
| Ohio | Charm | Charm, OH |
| Ohio | Chatfield | Chatfield, OH |
| Ohio | Chauncey | Chauncey, OH |
| Ohio | Cherry Fork | Cherry Fork, OH |
| Ohio | Chesapeake | Chesapeake, OH |
| Ohio | Cheshire | Cheshire, OH |
| Ohio | Chester | Chester, OH |
| Ohio | Chesterhill | Chesterhill, OH |
| Ohio | Chesterland | Chesterland, OH |
| Ohio | Chesterville | Chesterville, OH |