| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Coal Grove | city | Ohio | United States | 38.50 | -82.65 | 830 | |
| Coal Hill | city | Ohio | United States | 39.79 | -81.72 | 1000 | |
| Coal Ridge | city | Ohio | United States | 39.81 | -81.57 | 830 | |
| Coal Run | city | Ohio | United States | 39.57 | -81.58 | 830 | |
| Coalburg | city | Ohio | United States | 41.19 | -80.59 | 990 | |
| Coalgate | city | Ohio | United States | 39.54 | -82.18 | 898 | |
| Coalport | city | Ohio | United States | 40.28 | -81.61 | 830 | |
| Coalton | city | Ohio | United States | 39.11 | -82.61 | 830 | |
| Coats | city | Ohio | United States | 39.78 | -81.06 | 997 | |
| Cobblestone At The Preserve | city | Ohio | United States | 40.07 | -82.85 | 951 | |
| Cobblestone Chase | city | Ohio | United States | 41.47 | -81.91 | 830 | |
| Cobblestone Pointe | city | Ohio | United States | 40.04 | -84.24 | 898 | |
| Cobbleton Grove | city | Ohio | United States | 39.89 | -82.86 | 830 | |
| Coble Village | city | Ohio | United States | 41.04 | -82.69 | 918 | |
| Cockrell Run | city | Ohio | United States | 38.95 | -82.98 | 830 | |
| Coddingville | city | Ohio | United States | 41.14 | -81.71 | 1049 | |
| Coits | city | Ohio | United States | 41.55 | -81.60 | 830 | |
| Coitsville Center | city | Ohio | United States | 41.09 | -80.57 | 1076 | |
| Cokesbury Corners | city | Ohio | United States | 40.18 | -82.55 | 1171 | |
| Colby | city | Ohio | United States | 41.26 | -82.95 | 830 | |
| Cold Springs | city | Ohio | United States | 41.73 | -80.87 | 830 | |
| Coldwater | city | Ohio | United States | 40.48 | -84.63 | 898 | |
| Coldwater Beach | city | Ohio | United States | 40.50 | -84.55 | 875 | |
| Cole | city | Ohio | United States | 39.30 | -81.91 | 830 | |
| Cole's Trailer Park | city | Ohio | United States | 40.55 | -84.56 | 875 | |
| Colebrook | city | Ohio | United States | 41.54 | -80.76 | 990 | |
| Coleman | city | Ohio | United States | 40.80 | -80.81 | 1049 | |
| Colerain | city | Ohio | United States | 40.13 | -80.81 | 1184 | |
| Colerain Heights | city | Ohio | United States | 39.24 | -84.60 | 898 | |
| Coles Park | city | Ohio | United States | 38.79 | -83.02 | 830 | |
| Coletown | city | Ohio | United States | 40.13 | -84.70 | 1046 | |
| Colfax | city | Ohio | United States | 39.74 | -82.50 | 997 | |
| Collamer | city | Ohio | United States | 41.54 | -81.57 | 830 | |
| College Corner | city | Ohio | United States | 39.57 | -84.81 | 997 | |
| College Hill | city | Ohio | United States | 40.04 | -81.65 | 997 | |
| College Hill | city | Ohio | United States | 39.20 | -84.55 | 898 | |
| College Hill | city | Ohio | United States | 40.54 | -82.33 | 1108 | |
| Collins | city | Ohio | United States | 41.26 | -82.49 | 889 | |
| Collinsville | city | Ohio | United States | 39.52 | -84.61 | 830 | |
| Collinwood | city | Ohio | United States | 41.56 | -81.57 | 830 | |
| Colonial Acres | city | Ohio | United States | 41.55 | -83.61 | 830 | |
| Colonial Acres | city | Ohio | United States | 40.57 | -83.16 | 938 | |
| Colonial Estates | city | Ohio | United States | 39.74 | -82.65 | 885 | |
| Colonial Estates | city | Ohio | United States | 40.56 | -84.19 | 898 | |
| Colonial Heights | city | Ohio | United States | 40.00 | -81.70 | 875 | |
| Colonial Hills | city | Ohio | United States | 40.78 | -82.49 | 1669 | |
| Colonial Hills | city | Ohio | United States | 40.81 | -81.49 | 1095 | |
| Colonial Manor Mobile Home Park | city | Ohio | United States | 41.45 | -84.01 | 830 | |
| Colonial Mobile Home Park | city | Ohio | United States | 40.08 | -84.64 | 1046 | |
| Colonial Oaks | city | Ohio | United States | 41.34 | -82.10 | 830 | |
| Colonial Villa | city | Ohio | United States | 41.38 | -82.49 | 830 | |
| Colony Meadows Trailer Court | city | Ohio | United States | 41.52 | -84.32 | 830 | |
| Colony Mobile Home Park | city | Ohio | United States | 38.75 | -82.99 | 830 | |
| Colony Mobile Home Park | city | Ohio | United States | 40.73 | -84.04 | 941 | |
| Colony Village Mobile Home Park | city | Ohio | United States | 39.68 | -82.57 | 830 | |
| Colters Mobile Home Park | city | Ohio | United States | 41.15 | -84.58 | 830 | |
| Colton | city | Ohio | United States | 41.46 | -83.95 | 830 | |
| Colts Neck | city | Ohio | United States | 40.03 | -82.80 | 1010 | |
| Columbia | city | Ohio | United States | 40.58 | -81.51 | 938 | |
| Columbia | city | Ohio | United States | 41.63 | -84.79 | 997 | |
| Columbia | city | Ohio | United States | 40.78 | -81.52 | 997 | |
| Columbia | city | Ohio | United States | 39.11 | -84.43 | 830 | |
| Columbia Center | city | Ohio | United States | 41.31 | -81.93 | 830 | |
| Columbia Center | city | Ohio | United States | 40.00 | -82.70 | 997 | |
| Columbia Estates Mobile Home Park | city | Ohio | United States | 40.55 | -84.37 | 889 | |
| Columbia Heights | city | Ohio | United States | 39.39 | -84.58 | 830 | |
| Columbia Hills Corners | city | Ohio | United States | 41.31 | -81.92 | 830 | |
| Columbia Park | city | Ohio | United States | 41.39 | -81.91 | 830 | |
| Columbia Station | city | Ohio | United States | 41.31 | -81.95 | 830 | |
| Columbiana | city | Ohio | United States | 40.89 | -80.69 | 1112 | |
| Columbopolis | city | Ohio | United States | 39.96 | -83.00 | 830 | |
| Columbus | city | Ohio | United States | 39.96 | -83.00 | 830 | |
| Columbus Grove | city | Ohio | United States | 40.92 | -84.06 | 830 | |
| Columbus Park | city | Ohio | United States | 41.40 | -82.67 | 830 | |
| Columbus i Ohio | city | Ohio | United States | 39.96 | -83.00 | 830 | |
| Comargo | city | Ohio | United States | 39.29 | -84.16 | 882 | |
| Comet | city | Ohio | United States | 40.92 | -81.53 | 997 | |
| Comet | city | Ohio | United States | 39.12 | -82.55 | 830 | |
| Comet Trailer Park | city | Ohio | United States | 40.92 | -81.53 | 997 | |
| Commercial Point | city | Ohio | United States | 39.77 | -83.06 | 830 | |
| Compton Park | city | Ohio | United States | 39.23 | -84.51 | 830 | |
| Compton Woods | city | Ohio | United States | 39.23 | -84.50 | 830 | |
| Conant | city | Ohio | United States | 40.72 | -84.28 | 830 | |
| Concord | city | Ohio | United States | 39.02 | -84.08 | 862 | |
| Concord | city | Ohio | United States | 40.09 | -84.58 | 1046 | |
| Concord | city | Ohio | United States | 40.14 | -82.64 | 1095 | |
| Concord | city | Ohio | United States | 41.67 | -81.22 | 889 | |
| Concord Estates | city | Ohio | United States | 41.62 | -81.44 | 830 | |
| Concord Hills | city | Ohio | United States | 39.32 | -84.39 | 895 | |
| Concord Lakes | city | Ohio | United States | 39.89 | -83.12 | 830 | |
| Concord Park | city | Ohio | United States | 39.88 | -83.12 | 830 | |
| Condeville | city | Ohio | United States | 38.95 | -81.91 | 830 | |
| Condit | city | Ohio | United States | 40.26 | -82.79 | 1092 | |
| Conesville | city | Ohio | United States | 40.18 | -81.89 | 830 | |
| Confederate Crossroads (historical) | city | Ohio | United States | 39.84 | -81.86 | 830 | |
| Congo | city | Ohio | United States | 39.62 | -82.12 | 856 | |
| Congress | city | Ohio | United States | 40.93 | -82.05 | 1102 | |
| Congress Lake (historical) | city | Ohio | United States | 40.98 | -81.33 | 1181 | |
| Conneaut | city | Ohio | United States | 41.95 | -80.55 | 830 | |
| Connett | city | Ohio | United States | 39.41 | -82.25 | 898 | |
| Connor | city | Ohio | United States | 40.19 | -80.71 | 830 | |
| Connorville | city | Ohio | United States | 40.19 | -80.71 | 830 | |
| Conotton | city | Ohio | United States | 40.42 | -81.15 | 997 | |
| Conover | city | Ohio | United States | 40.14 | -84.05 | 1118 | |
| Consol (historical) | city | Ohio | United States | 39.51 | -82.19 | 862 | |
| Constitution | city | Ohio | United States | 39.35 | -81.55 | 830 | |
| Continental | city | Ohio | United States | 41.10 | -84.27 | 830 | |
| Contreras | city | Ohio | United States | 39.52 | -84.81 | 987 | |
| Converse | city | Ohio | United States | 40.74 | -84.42 | 830 | |
| Converse Station | city | Ohio | United States | 40.73 | -84.42 | 830 | |
| Convoy | city | Ohio | United States | 40.92 | -84.70 | 830 | |
| Conway Addition | city | Ohio | United States | 39.75 | -82.09 | 830 | |
| Conwood Estates | city | Ohio | United States | 40.02 | -84.25 | 898 | |
| Cook | city | Ohio | United States | 39.68 | -83.31 | 898 | |
| Cook Subdivision | city | Ohio | United States | 38.79 | -82.23 | 830 | |
| Cooks Rolling Hills | city | Ohio | United States | 41.30 | -84.38 | 830 | |
| Coolville | city | Ohio | United States | 39.22 | -81.80 | 830 | |
| Coon Crossing | city | Ohio | United States | 39.16 | -83.39 | 997 | |
| Cooney | city | Ohio | United States | 41.66 | -84.75 | 971 | |
| Coonville | city | Ohio | United States | 41.35 | -82.10 | 830 | |
| Coonville | city | Ohio | United States | 39.40 | -82.34 | 859 | |
| Cooper | city | Ohio | United States | 41.17 | -82.98 | 846 | |
| Cooperdale | city | Ohio | United States | 40.22 | -82.07 | 830 | |
| Coopers Mobile Home Park | city | Ohio | United States | 40.60 | -80.65 | 830 | |
| Coopersville | city | Ohio | United States | 38.96 | -83.04 | 830 | |
| Copley | city | Ohio | United States | 41.10 | -81.64 | 1049 | |
| Copley Junction | city | Ohio | United States | 41.10 | -81.60 | 1007 | |
| Copperwood | city | Ohio | United States | 40.00 | -83.17 | 898 | |
| Cora | city | Ohio | United States | 38.82 | -82.37 | 830 | |
| Cordelia | city | Ohio | United States | 40.90 | -83.79 | 830 | |
| Cordle Mobile Home Park | city | Ohio | United States | 39.86 | -83.52 | 1099 | |
| Corinth | city | Ohio | United States | 41.40 | -80.62 | 1000 | |
| Cork | city | Ohio | United States | 41.73 | -80.95 | 954 | |
| Cornelion | city | Ohio | United States | 41.49 | -80.53 | 1148 | |
| Cornell Heights | city | Ohio | United States | 39.78 | -84.24 | 830 | |
| Corner | city | Ohio | United States | 39.31 | -81.66 | 830 | |
| Cornersburg | city | Ohio | United States | 41.06 | -80.71 | 1049 | |
| Cornerville | city | Ohio | United States | 39.40 | -81.37 | 830 | |
| Corning | city | Ohio | United States | 39.60 | -82.09 | 830 | |
| Cornstalk | city | Ohio | United States | 39.57 | -83.99 | 895 | |
| Corryville | city | Ohio | United States | 39.13 | -84.52 | 830 | |
| Corryville | city | Ohio | United States | 38.44 | -82.42 | 830 | |
| Cortland | city | Ohio | United States | 41.33 | -80.73 | 1026 | |
| Cortsville | city | Ohio | United States | 39.80 | -83.72 | 1099 | |
| Corvin (historical) | city | Ohio | United States | 39.70 | -84.74 | 1099 | |
| Corwin | city | Ohio | United States | 39.53 | -84.08 | 830 | |
| Coryville | city | Ohio | United States | 38.54 | -82.66 | 830 | |
| Coshocton | city | Ohio | United States | 40.27 | -81.86 | 830 | |
| Cosmos | city | Ohio | United States | 40.27 | -84.78 | 1049 | |
| Costonia | city | Ohio | United States | 40.43 | -80.62 | 830 | |
| Cotillion Village | city | Ohio | United States | 39.11 | -84.64 | 830 | |
| Cotswold Manor | city | Ohio | United States | 41.46 | -81.90 | 830 | |
| Cottage Grove | city | Ohio | United States | 40.99 | -81.51 | 1095 | |
| Cottage Hill | city | Ohio | United States | 40.02 | -82.19 | 898 | |
| Coulter | city | Ohio | United States | 40.69 | -82.34 | 1099 | |
| Country Acres | city | Ohio | United States | 39.33 | -84.36 | 898 | |
| Country Club Acres | city | Ohio | United States | 39.18 | -84.38 | 830 | |
| Country Club Estates | city | Ohio | United States | 41.45 | -81.96 | 830 | |
| Country Club Highlands | city | Ohio | United States | 39.42 | -84.47 | 830 | |
| Country Club Hills | city | Ohio | United States | 40.54 | -83.16 | 918 | |
| Country Court Mobile Home Park | city | Ohio | United States | 39.98 | -81.55 | 830 | |
| Country Estates | city | Ohio | United States | 40.74 | -84.07 | 875 | |
| Country Estates Mobile Home Park | city | Ohio | United States | 40.62 | -82.67 | 1669 | |
| Country Haven Mobile Home Park | city | Ohio | United States | 39.89 | -84.01 | 830 | |
| Country Home Trailer Park | city | Ohio | United States | 39.21 | -83.44 | 898 | |
| Country Manor Estates | city | Ohio | United States | 41.43 | -83.68 | 830 | |
| Country Manor Estates | city | Ohio | United States | 40.93 | -84.30 | 830 | |
| Country Meadows | city | Ohio | United States | 41.56 | -83.51 | 830 | |
| Country Place Estates | city | Ohio | United States | 40.90 | -81.50 | 1095 | |
| Country Squire Mobile Home Park | city | Ohio | United States | 40.90 | -81.03 | 1095 | |
| Country View Estates | city | Ohio | United States | 39.41 | -84.47 | 830 | |
| Country View Mobile Home Park | city | Ohio | United States | 40.68 | -82.85 | 1095 | |
| Countryside Estates | city | Ohio | United States | 41.16 | -81.15 | 1049 | |
| Countryside Estates | city | Ohio | United States | 41.39 | -84.11 | 830 | |
| Countryside Estates | city | Ohio | United States | 41.25 | -84.31 | 830 | |
| Countryside Mobile Home Park | city | Ohio | United States | 40.23 | -83.36 | 997 | |
| Countryview Village | city | Ohio | United States | 39.91 | -82.83 | 830 | |
| Countrywide Estates | city | Ohio | United States | 41.03 | -81.15 | 1135 | |
| County Line | city | Ohio | United States | 39.74 | -84.48 | 931 | |
| County Line (historical) | city | Ohio | United States | 39.92 | -84.31 | 898 | |
| Courtland Meadows | city | Ohio | United States | 41.44 | -81.92 | 830 | |
| Courtright (historical) | city | Ohio | United States | 39.45 | -82.93 | 830 | |
| Courtyard Mobile Home Park | city | Ohio | United States | 41.62 | -81.44 | 830 | |
| Courtyards At Little Bear | city | Ohio | United States | 40.16 | -83.00 | 928 | |
| Cove Cottage Area | city | Ohio | United States | 40.55 | -81.25 | 994 | |
| Covedale | city | Ohio | United States | 39.12 | -84.61 | 898 | |
| Coventry | city | Ohio | United States | 40.00 | -83.16 | 964 | |
| Coventry Estates | city | Ohio | United States | 40.05 | -81.56 | 941 | |
| Coventry Estates | city | Ohio | United States | 41.01 | -81.49 | 1020 | |
| Coventry Hills | city | Ohio | United States | 40.85 | -81.51 | 1095 | |
| Coventry Manor | city | Ohio | United States | 40.04 | -83.18 | 898 | |
| Covington | city | Ohio | United States | 40.12 | -84.35 | 918 | |
| Cow Run | city | Ohio | United States | 39.45 | -81.31 | 951 | |
| Cowans (historical) | city | Ohio | United States | 41.38 | -81.49 | 944 | |
| Cowlesville | city | Ohio | United States | 39.98 | -84.19 | 853 | |
| Cox (historical) | city | Ohio | United States | 39.30 | -82.74 | 830 | |
| Cox Subdivision | city | Ohio | United States | 41.58 | -84.57 | 882 | |
| Coys Subdivision | city | Ohio | United States | 41.48 | -84.41 | 830 | |
| Cozaddale | city | Ohio | United States | 39.27 | -84.16 | 856 | |
| Cozy Acres | city | Ohio | United States | 40.66 | -81.64 | 1095 |