Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Rose Street Park | Park | 308 | Clark | 39 54 24 N | 083 50 03 W |
| Rose Valley | Valley | | Harrison | 40 14 44 N | 080 53 49 W |
| Rose Valley Creek | Stream | | Harrison | 40 14 43 N | 080 53 46 W |
| Rose Valley Number 6 Mine | Mine | 342 | Harrison | 40 16 45 N | 080 53 54 W |
| Rosebush School (historical) | School | 313 | Highland | 39 16 14 N | 083 30 49 W |
| Rosecrans High School | School | 252 | Muskingum | 39 56 21 N | 081 59 49 W |
| Rosedale | Populated Place | 222 | Defiance | 41 17 28 N | 084 41 25 W |
| Rosedale | Populated Place | 308 | Madison | 40 04 41 N | 083 27 18 W |
| Rosedale Bible Institute | School | 308 | Madison | 40 04 41 N | 083 27 20 W |
| Rosedale Cemetery | Cemetery | 339 | Champaign | 40 12 19 N | 083 59 03 W |
| Rosedale Elementary School | School | 250 | Butler | 39 30 55 N | 084 20 51 W |
| Rosedale Post Office (historical) | Post Office | 308 | Madison | 40 04 40 N | 083 27 20 W |
| Rosedale School | School | 200 | Cuyahoga | 41 31 12 N | 081 36 15 W |
| Rosedale School (historical) | School | 276 | Guernsey | 40 01 41 N | 081 20 39 W |
| Rosehill Post Office (historical) | Post Office | 327 | Darke | 40 18 30 N | 084 43 30 W |
| Roseland | Populated Place | 245 | Franklin | 39 59 00 N | 082 54 60 W |
| Roseland | Populated Place | 372 | Richland | 40 47 19 N | 082 32 34 W |
| Roseland Elementary School | School | 397 | Richland | 40 46 49 N | 082 33 10 W |
| Roselawn | Populated Place | 179 | Hamilton | 39 11 42 N | 084 27 45 W |
| Roselawn Cemetery | Cemetery | 320 | Cuyahoga | 41 23 20 N | 081 26 49 W |
| Roselawn Cemetery | Cemetery | 308 | Preble | 39 51 07 N | 084 32 34 W |
| Roselawn Lutheran Church | Church | 181 | Hamilton | 39 12 09 N | 084 27 35 W |
| Roselawn Memorial Park | Cemetery | 193 | Wood | 41 30 48 N | 083 27 58 W |
| Roselawn Park | Park | 177 | Hamilton | 39 11 12 N | 084 27 24 W |
| Roselawn-Condon Elementary School | School | 181 | Hamilton | 39 12 10 N | 084 27 40 W |
| Roselms | Populated Place | 219 | Paulding | 41 01 10 N | 084 25 09 W |
| Roselms Church | Church | 219 | Paulding | 41 01 02 N | 084 25 10 W |
| Roselms Post Office (historical) | Post Office | 220 | Paulding | 41 01 10 N | 084 25 10 W |
| Rosemont | Populated Place | 329 | Mahoning | 41 03 48 N | 080 53 11 W |
| Rosemont Golf Club | Locale | 310 | Summit | 41 08 05 N | 081 38 11 W |
| Rosemont High School | School | 248 | Franklin | 40 01 11 N | 082 56 36 W |
| Rosemont Hollow | Valley | | Scioto | 38 46 56 N | 082 58 57 W |
| Rosemont Post Office (historical) | Post Office | 327 | Mahoning | 41 03 50 N | 080 53 09 W |
| Rosemoor | Populated Place | 325 | Fayette | 39 37 40 N | 083 40 01 W |
| Rosemount | Populated Place | 185 | Scioto | 38 47 10 N | 082 58 45 W |
| Rosemount Elementary School | School | 167 | Scioto | 38 47 07 N | 082 59 03 W |
| Rosemount Nazarene Church | Church | 171 | Scioto | 38 47 01 N | 082 58 44 W |
| Rosencrans Cemetery | Cemetery | 293 | Delaware | 40 17 18 N | 082 52 23 W |
| Rosers Run | Stream | | Warren | 39 31 04 N | 084 10 50 W |
| Roses Run | Stream | | Columbiana | 40 38 43 N | 080 50 33 W |
| Roseville | Populated Place | 221 | Muskingum | 39 48 26 N | 082 04 17 W |
| Roseville Cemetery | Cemetery | 243 | Perry | 39 48 31 N | 082 04 32 W |
| Roseville Elementary School | School | 231 | Perry | 39 48 02 N | 082 04 32 W |
| Roseville Post Office | Post Office | 221 | Muskingum | 39 48 25 N | 082 04 15 W |
| Roseville Primary School | School | 226 | Muskingum | 39 48 35 N | 082 04 24 W |
| Rosewood | Populated Place | 346 | Champaign | 40 13 08 N | 083 57 39 W |
| Rosewood Park | Park | 292 | Montgomery | 39 36 15 N | 084 10 43 W |
| Rosewood Post Office | Post Office | 345 | Champaign | 40 13 10 N | 083 57 40 W |
| Rosewood School | School | 288 | Montgomery | 39 41 44 N | 084 07 02 W |
| Rosewood United Methodist Church | Church | 347 | Champaign | 40 13 10 N | 083 57 36 W |
| Ross | Populated Place | 167 | Butler | 39 18 44 N | 084 39 02 W |
| Ross Avenue Church of God | Church | 206 | Butler | 39 24 41 N | 084 35 19 W |
| Ross Avenue Park | Park | 162 | Hamilton | 39 10 16 N | 084 29 35 W |
| Ross Cemetery | Cemetery | 269 | Athens | 39 18 42 N | 082 11 47 W |
| Ross Cemetery | Cemetery | 293 | Lawrence | 38 33 25 N | 082 30 50 W |
| Ross Cemetery | Cemetery | 432 | Morrow | 40 40 52 N | 082 40 54 W |
| Ross Church | Church | 253 | Mercer | 40 40 39 N | 084 27 55 W |
| Ross Commons Shopping Center | Locale | 338 | Summit | 41 11 13 N | 081 26 27 W |
| Ross County | Civil | 208 | Ross | 39 21 00 N | 083 04 00 W |
| Ross County Airport | Airport | 219 | Ross | 39 26 26 N | 083 01 24 W |
| Ross County Courthouse | Building | 192 | Ross | 39 20 00 N | 082 58 57 W |
| Ross County Lake State Wildlife Area | Park | 244 | Ross | 39 21 30 N | 082 54 25 W |
| Ross County Museum | Building | 192 | Ross | 39 19 50 N | 082 58 58 W |
| Ross Field | Airport | 292 | Ross | 39 21 55 N | 083 21 16 W |
| Ross Field Industrial Park | Locale | 201 | Hamilton | 39 17 57 N | 084 28 08 W |
| Ross High School | School | 176 | Butler | 39 20 01 N | 084 37 54 W |
| Ross Hollow | Valley | | Athens | 39 18 05 N | 082 10 29 W |
| Ross Hollow | Valley | | Pike | 39 00 51 N | 083 07 42 W |
| Ross Lake | Reservoir | 244 | Hancock | 40 56 34 N | 083 48 14 W |
| Ross Lake | Reservoir | 207 | Ross | 39 20 06 N | 082 54 18 W |
| Ross Lake Dam | Dam | 207 | Ross | 39 20 06 N | 082 54 18 W |
| Ross Lateral | Canal | 306 | Darke | 40 15 19 N | 084 39 07 W |
| Ross Middle School | School | 176 | Butler | 39 19 56 N | 084 37 59 W |
| Ross Park | Park | 311 | Summit | 41 09 37 N | 081 28 21 W |
| Ross Post Office | Post Office | 167 | Butler | 39 18 45 N | 084 38 60 W |
| Ross Run | Stream | | Athens | 39 12 01 N | 081 46 13 W |
| Ross Run | Stream | | Belmont | 40 09 15 N | 080 58 15 W |
| Ross Run | Stream | | Brown | 38 50 17 N | 083 56 05 W |
| Ross Run | Stream | | Hamilton | 39 10 14 N | 084 30 21 W |
| Ross Run | Stream | | Harrison | 40 09 52 N | 080 58 12 W |
| Ross Run | Stream | | Meigs | 39 02 32 N | 081 49 55 W |
| Ross School (historical) | School | 286 | Brown | 39 05 02 N | 083 57 50 W |
| Ross School (historical) | School | 240 | Fulton | 41 40 57 N | 084 07 25 W |
| Ross School (historical) | School | 320 | Knox | 40 18 51 N | 082 21 01 W |
| Ross School (historical) | School | 249 | Muskingum | 40 07 48 N | 081 55 45 W |
| Ross School (historical) | School | 297 | Tuscarawas | 40 22 11 N | 081 19 04 W |
| Ross School (historical) | School | 360 | Tuscarawas | 40 19 17 N | 081 26 59 W |
| Ross Township Cemetery | Cemetery | 280 | Butler | 39 21 41 N | 084 41 33 W |
| Ross-Pike County Tabernacle | Church | 329 | Ross | 39 11 35 N | 083 08 52 W |
| Rossburg | Populated Place | 314 | Darke | 40 16 44 N | 084 38 15 W |
| Rossburg | Populated Place | 253 | Warren | 39 18 35 N | 084 07 04 W |
| Rossburg Post Office | Post Office | 314 | Darke | 40 16 45 N | 084 38 15 W |
| Rossburg United Methodist Church | Church | 315 | Darke | 40 16 47 N | 084 38 18 W |
| Rosse Hall | Building | 329 | Knox | 40 22 26 N | 082 23 51 W |
| Rosseau | Populated Place | 244 | Morgan | 39 34 25 N | 081 56 49 W |
| Rosseau Post Office (historical) | Post Office | 243 | Morgan | 39 34 25 N | 081 56 50 W |
| Rossella Cemetery | Cemetery | 270 | Warren | 39 19 28 N | 084 02 32 W |
| Rossford | Populated Place | 188 | Wood | 41 36 35 N | 083 33 52 W |
| Rossford First Baptist Church | Church | 188 | Wood | 41 36 47 N | 083 33 31 W |
| Rossford High School | School | 187 | Wood | 41 36 32 N | 083 33 34 W |
| Rossford Middle School | School | 186 | Wood | 41 36 35 N | 083 33 30 W |
| Rossford Ordnance Depot (historical) | Military (Historical) | 190 | Wood | 41 34 59 N | 083 32 57 W |
| Rossford Post Office | Post Office | 176 | Wood | 41 36 27 N | 083 33 28 W |
| Rossford Public Library | Building | 187 | Wood | 41 36 31 N | 083 33 42 W |
| Rossford United Methodist Church | Church | 188 | Wood | 41 36 47 N | 083 33 19 W |
| Rossman School (historical) | School | 170 | Brown | 38 45 50 N | 083 51 04 W |
| Rossmoyne | Populated Place | 254 | Hamilton | 39 12 49 N | 084 23 13 W |
| Rossmoyne Post Office (historical) | Post Office | 254 | Hamilton | 39 12 50 N | 084 23 15 W |
| Rossville | Populated Place | 263 | Miami | 40 09 25 N | 084 14 21 W |
| Rossville Historic District | Park | 193 | Butler | 39 24 05 N | 084 34 19 W |