Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Commercial Point | Populated Place | 238 | Pickaway | 39 46 06 N | 083 03 26 W |
| Commercial Point Post Office | Post Office | 238 | Pickaway | 39 46 05 N | 083 03 25 W |
| Commercial Point United Methodist Church | Church | 240 | Pickaway | 39 46 13 N | 083 03 36 W |
| Commercial Street Historic District | Park | 222 | Jefferson | 40 19 15 N | 080 36 27 W |
| Community African Methodist Episcopal Church | Church | 195 | Cuyahoga | 41 30 44 N | 081 38 57 W |
| Community Baptist Chapel | Church | 276 | Tuscarawas | 40 31 31 N | 081 28 16 W |
| Community Baptist Church | Church | 244 | Franklin | 39 58 35 N | 082 55 23 W |
| Community Baptist Church | Church | 180 | Hamilton | 39 09 29 N | 084 23 43 W |
| Community Baptist Church | Church | 363 | Summit | 41 06 32 N | 081 24 52 W |
| Community Christian Academy | School | 262 | Cuyahoga | 41 23 43 N | 081 46 37 W |
| Community Christian Church | Church | 244 | Franklin | 39 57 09 N | 083 04 31 W |
| Community Christian Church | Church | | Lake | 41 45 02 N | 081 11 31 W |
| Community Christian Fellowship Church | Church | 294 | Hardin | 40 38 17 N | 083 36 24 W |
| Community Church | Church | 334 | Cuyahoga | 41 24 08 N | 081 26 15 W |
| Community Church | Church | 287 | Delaware | 40 18 03 N | 083 05 35 W |
| Community Church | Church | 259 | Fairfield | 39 43 05 N | 082 33 24 W |
| Community Church | Church | 358 | Geauga | 41 32 39 N | 081 21 49 W |
| Community Church | Church | 244 | Guernsey | 40 09 57 N | 081 39 01 W |
| Community Church | Church | 228 | Hocking | 39 26 55 N | 082 18 54 W |
| Community Church | Church | 269 | Licking | 39 55 43 N | 082 29 50 W |
| Community Church | Church | 291 | Tuscarawas | 40 20 22 N | 081 24 19 W |
| Community Church of Cincinnati | Church | 164 | Hamilton | 39 07 07 N | 084 31 50 W |
| Community Church of God in Christ | Church | 187 | Lucas | 41 38 56 N | 083 35 37 W |
| Community Church of Greenville | Church | 317 | Darke | 40 05 07 N | 084 37 52 W |
| Community Church of the Nazarene | Church | 184 | Lucas | 41 39 54 N | 083 31 14 W |
| Community Fellowship Chapel | Church | 342 | Summit | 41 02 48 N | 081 29 46 W |
| Community Friends Church | Church | 249 | Cuyahoga | 41 26 12 N | 081 37 43 W |
| Community Friends Church of Urban Ministries | Church | 302 | Summit | 41 03 18 N | 081 32 12 W |
| Community Friends Meeting House | Church | 201 | Hamilton | 39 09 12 N | 084 28 35 W |
| Community Gospel Worship Center | Church | 232 | Montgomery | 39 45 09 N | 084 10 04 W |
| Community Hospital Heliport | Airport | 277 | Mercer | 40 28 49 N | 084 38 19 W |
| Community Hospital of Bedford | Hospital | 295 | Cuyahoga | 41 23 42 N | 081 32 05 W |
| Community Hospital of Springfield and Clark County | Hospital | 314 | Clark | 39 55 11 N | 083 46 09 W |
| Community Hospital of Warren | Hospital | 274 | Trumbull | 41 14 51 N | 080 49 38 W |
| Community Library on the Square | Building | 296 | Delaware | 40 14 33 N | 082 51 33 W |
| Community Medical Center Heliport | Airport | 299 | Marion | 40 34 11 N | 083 07 13 W |
| Community Memorial Hospital | Hospital | 232 | Defiance | 41 18 02 N | 084 45 24 W |
| Community Missionary Baptist Church | Church | 194 | Hamilton | 39 09 33 N | 084 26 51 W |
| Community Missionary Baptist Church | Church | 292 | Montgomery | 39 44 58 N | 084 16 01 W |
| Community Missionary Church | Church | 264 | Miami | 40 08 43 N | 084 13 56 W |
| Community Park East | Park | 256 | Greene | 39 47 38 N | 084 00 31 W |
| Community United Methodist Church | Church | 297 | Marion | 40 33 37 N | 083 04 57 W |
| Community United Methodist Church | Church | 311 | Montgomery | 39 50 07 N | 084 24 43 W |
| Community United Methodist Church | Church | 211 | Pickaway | 39 36 04 N | 082 56 31 W |
| Como Avenue United Methodist Church | Church | 239 | Franklin | 40 01 42 N | 083 00 51 W |
| Como Elementary School | School | 262 | Franklin | 40 01 32 N | 082 59 34 W |
| Como Park | Park | 224 | Franklin | 40 01 40 N | 083 01 24 W |
| Compo Park | Park | 215 | Defiance | 41 16 25 N | 084 21 11 W |
| Comprix Heliport | Airport | 223 | Franklin | 39 50 22 N | 082 54 28 W |
| Compromise School (historical) | School | 295 | Hardin | 40 36 53 N | 083 32 54 W |
| Compton Cemetery | Cemetery | 263 | Fayette | 39 30 28 N | 083 17 53 W |
| Compton Cemetery | Cemetery | 293 | Montgomery | 39 53 17 N | 084 10 46 W |
| Compton Creek | Stream | | Fayette | 39 29 53 N | 083 16 09 W |
| Compton Hall | Building | 338 | Wayne | 40 48 49 N | 081 56 01 W |
| Compton Hall | Building | 206 | Wood | 41 22 39 N | 083 37 49 W |
| Compton Park | Populated Place | 250 | Hamilton | 39 13 52 N | 084 30 26 W |
| Compton School (historical) | School | 269 | Adams | 38 48 27 N | 083 27 49 W |
| Compton Woods | Populated Place | 247 | Hamilton | 39 13 56 N | 084 29 54 W |
| Comstock Ditch | Canal | 206 | Lucas | 41 42 08 N | 083 45 17 W |
| Comstock Pond | Reservoir | 254 | Morgan | 39 34 06 N | 081 56 36 W |
| Comstock Pond Dam | Dam | 254 | Morgan | 39 34 06 N | 081 56 36 W |
| Comtech Scott Park Campus | School | 187 | Lucas | 41 38 33 N | 083 35 49 W |
| Conant | Populated Place | 252 | Allen | 40 43 08 N | 084 16 50 W |
| Conant Post Office (historical) | Post Office | 252 | Allen | 40 43 10 N | 084 16 50 W |
| Conarroe Corners | Locale | 331 | Preble | 39 42 57 N | 084 40 38 W |
| Conaway Chapel | Church | 244 | Adams | 39 01 50 N | 083 22 58 W |
| Conaway School (historical) | School | 245 | Adams | 39 01 53 N | 083 22 54 W |
| Concept Park | Park | 286 | Montgomery | 39 37 05 N | 084 09 09 W |
| Concord | Populated Place | 263 | Clermont | 39 01 19 N | 084 04 49 W |
| Concord | Populated Place | 316 | Darke | 40 05 10 N | 084 34 43 W |
| Concord | Populated Place | 268 | Lake | 41 40 28 N | 081 13 28 W |
| Concord | Populated Place | 341 | Licking | 40 08 35 N | 082 38 17 W |
| Concord Airpark | Airport | 302 | Lake | 41 40 01 N | 081 11 49 W |
| Concord Cemetery | Cemetery | 263 | Athens | 39 27 03 N | 082 03 03 W |
| Concord Cemetery | Cemetery | 324 | Auglaize | 40 36 12 N | 083 59 38 W |
| Concord Cemetery | Cemetery | 326 | Champaign | 40 09 27 N | 083 50 30 W |
| Concord Cemetery | Cemetery | 262 | Clermont | 39 01 26 N | 084 04 28 W |
| Concord Cemetery | Cemetery | 248 | Franklin | 39 50 14 N | 083 04 21 W |
| Concord Cemetery | Cemetery | 265 | Lake | 41 40 25 N | 081 13 12 W |
| Concord Cemetery | Cemetery | 354 | Licking | 40 08 53 N | 082 38 18 W |
| Concord Cemetery | Cemetery | 266 | Montgomery | 39 51 36 N | 084 17 04 W |
| Concord Cemetery | Cemetery | 332 | Preble | 39 42 47 N | 084 46 07 W |
| Concord Cemetery | Cemetery | 220 | Ross | 39 17 31 N | 082 52 32 W |
| Concord Church | Church | 263 | Athens | 39 27 02 N | 082 03 05 W |
| Concord Church | Church | 396 | Belmont | 39 58 28 N | 080 57 22 W |
| Concord Church | Church | 322 | Champaign | 40 09 26 N | 083 50 35 W |
| Concord Church | Church | 244 | Franklin | 39 50 18 N | 083 04 19 W |
| Concord Church | Church | 349 | Licking | 40 08 55 N | 082 38 15 W |
| Concord Church | Church | 329 | Mahoning | 40 58 22 N | 080 51 20 W |
| Concord Church | Church | 266 | Montgomery | 39 51 36 N | 084 17 04 W |
| Concord Church | Church | 332 | Preble | 39 42 48 N | 084 46 11 W |
| Concord Church | Church | 220 | Ross | 39 17 27 N | 082 52 32 W |
| Concord Church | Church | 263 | Ross | 39 21 12 N | 083 12 17 W |
| Concord Elementary School | School | 336 | Highland | 39 04 22 N | 083 39 44 W |
| Concord Elementary School | School | 276 | Lake | 41 40 17 N | 081 13 25 W |
| Concord Elementary School | School | 282 | Miami | 40 02 24 N | 084 15 41 W |
| Concord Methodist Episcopal Church (historical) | Church | 317 | Madison | 39 45 59 N | 083 26 48 W |
| Concord Mobile Home Park (subdivision) | Populated Place | 209 | Lake | 41 37 20 N | 081 26 36 W |
| Concord Plaza Shopping Center | Locale | 239 | Lake | 41 40 25 N | 081 16 57 W |
| Concord Post Office (historical) | Post Office | 265 | Lake | 41 40 30 N | 081 13 29 W |
| Concord Presbyterian Cemetery | Cemetery | 268 | Ross | 39 21 14 N | 083 12 18 W |
| Concord Residence Hall | Building | 319 | Summit | 41 04 20 N | 081 30 54 W |
| Concord School | School | 331 | Champaign | 40 09 50 N | 083 51 08 W |
| Concord School | School | 234 | Hamilton | 39 12 31 N | 084 21 53 W |
| Concord School (historical) | School | 268 | Clermont | 39 00 20 N | 084 12 30 W |
| Concord School (historical) | School | 281 | Guernsey | 39 56 10 N | 081 25 29 W |
| Concord School (historical) | School | 334 | Licking | 40 13 15 N | 082 20 13 W |
| Concord School (historical) | School | 315 | Madison | 39 45 44 N | 083 26 36 W |
| Concord School (historical) | School | 322 | Ross | 39 21 12 N | 083 08 27 W |
| Concord Village Shopping Center | Locale | 256 | Hamilton | 39 07 08 N | 084 39 11 W |