| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Cicero (historical) | city | Ohio | United States | 41.34 | -84.71 | 830 | |
| Cilley (historical) | city | Ohio | United States | 39.18 | -84.78 | 830 | |
| Cincinnati | city | Ohio | United States | 39.16 | -84.46 | 830 | |
| Cincinnatopolis | city | Ohio | United States | 39.16 | -84.46 | 830 | |
| Circle Green | city | Ohio | United States | 40.48 | -80.88 | 1246 | |
| Circle Hill | city | Ohio | United States | 40.07 | -84.41 | 971 | |
| Circle Hills | city | Ohio | United States | 39.58 | -82.91 | 830 | |
| Circle View Acres | city | Ohio | United States | 39.31 | -84.38 | 895 | |
| Circle Z Mobile Home Park | city | Ohio | United States | 39.72 | -84.22 | 853 | |
| Circleville | city | Ohio | United States | 39.60 | -82.95 | 830 | |
| Circlewood | city | Ohio | United States | 41.45 | -81.90 | 830 | |
| City View Heights | city | Ohio | United States | 39.42 | -84.55 | 830 | |
| City of the Village of Indian Hill | city | Ohio | United States | 39.18 | -84.35 | 830 |