Towns
| State | City/Town | Town Title |
|---|---|---|
| Ohio | Chickasaw | Chickasaw, OH |
| Ohio | Chillicothe | Chillicothe, OH |
| Ohio | Chilo | Chilo, OH |
| Ohio | Chippewa Lake | Chippewa Lake, OH |
| Ohio | Christiansburg | Christiansburg, OH |
| Ohio | Cincinnati | Cincinnati, OH |
| Ohio | Circleville | Circleville, OH |
| Ohio | Clarington | Clarington, OH |
| Ohio | Clarksburg | Clarksburg, OH |
| Ohio | Clarksville | Clarksville, OH |
| Ohio | Clay Center | Clay Center, OH |
| Ohio | Clayton | Clayton, OH |
| Ohio | Cleveland | Cleveland, OH |
| Ohio | Cleves | Cleves, OH |
| Ohio | Clifton | Clifton, OH |
| Ohio | Clinton | Clinton, OH |
| Ohio | Cloverdale | Cloverdale, OH |
| Ohio | Clyde | Clyde, OH |
| Ohio | Coal Run | Coal Run, OH |
| Ohio | Coalton | Coalton, OH |
| Ohio | Coldwater | Coldwater, OH |
| Ohio | Colerain | Colerain, OH |
| Ohio | College Corner | College Corner, OH |
| Ohio | Collins | Collins, OH |
| Ohio | Collinsville | Collinsville, OH |