Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Rain Rock | Populated Place | 290 | Licking | 40 11 34 N | 082 17 23 W |
| Rainbow | Populated Place | 196 | Washington | 39 29 40 N | 081 27 55 W |
| Rainbow Cemetery | Cemetery | 255 | Meigs | 39 02 57 N | 081 50 14 W |
| Rainbow Cemetery | Cemetery | 207 | Washington | 39 29 42 N | 081 28 07 W |
| Rainbow Creek | Stream | | Washington | 39 29 35 N | 081 29 33 W |
| Rainbow Hospital | Hospital | 302 | Cuyahoga | 41 30 56 N | 081 31 03 W |
| Rainbow Lake | Lake | 337 | Delaware | 40 09 23 N | 082 46 20 W |
| Rainbow Lake | Reservoir | 235 | Athens | 39 13 30 N | 082 04 36 W |
| Rainbow Lake Dam | Dam | 235 | Athens | 39 13 30 N | 082 04 36 W |
| Rainbow Lakes | Reservoir | 262 | Tuscarawas | 40 15 34 N | 081 33 25 W |
| Rainbow Park | Park | 238 | Franklin | 39 57 42 N | 082 57 33 W |
| Rainbow Ridge | Ridge | 238 | Meigs | 39 03 04 N | 081 50 26 W |
| Rainbow Ridge School (historical) | School | 259 | Meigs | 39 03 10 N | 081 50 04 W |
| Rainbow Run | Stream | | Clark | 39 47 41 N | 083 49 08 W |
| Rainey Park | Park | 198 | Cuyahoga | 41 28 35 N | 081 56 17 W |
| Raineys (historical) | Populated Place | 234 | Seneca | 41 08 34 N | 083 20 38 W |
| Rainsboro | Populated Place | 290 | Highland | 39 13 12 N | 083 25 20 W |
| Rainsboro Post Office | Post Office | 290 | Highland | 39 13 10 N | 083 25 20 W |
| Raintree Shopping Center | Locale | 268 | Franklin | 40 05 02 N | 082 57 11 W |
| Rainy Ridge | Ridge | 390 | Jefferson | 40 30 52 N | 080 54 59 W |
| Rake Cemetery | Cemetery | 225 | Washington | 39 28 40 N | 081 16 40 W |
| Raker Cemetery | Cemetery | 212 | Fulton | 41 31 46 N | 083 59 07 W |
| Raker Corners | Populated Place | 210 | Fulton | 41 31 49 N | 083 59 04 W |
| Raker School (historical) | School | 211 | Fulton | 41 31 50 N | 083 58 46 W |
| Raker Union Church | Church | 212 | Fulton | 41 31 48 N | 083 59 06 W |
| Rakestraw Ditch | Canal | 199 | Lucas | 41 30 34 N | 083 50 30 W |
| Rakestraw Memorial Field | Park | 151 | Hamilton | 39 06 53 N | 084 26 22 W |
| Rakestraw School (historical) | School | 299 | Miami | 40 11 00 N | 084 19 39 W |
| Raleigh School (historical) | School | 305 | Knox | 40 30 25 N | 082 17 14 W |
| Rall Field | Airport | 401 | Richland | 40 45 40 N | 082 25 05 W |
| Ralph (historical) | Populated Place | 335 | Delaware | 40 07 53 N | 082 46 51 W |
| Ralph and Gladys Koehler Fitness and Recreation Complex | Building | 238 | Hancock | 41 03 23 N | 083 39 08 W |
| Ralph M Besse Library | Building | 322 | Cuyahoga | 41 29 50 N | 081 27 56 W |
| Ralph Perkins II Wildlife Center and Woods Garden | Locale | 204 | Cuyahoga | 41 30 43 N | 081 36 46 W |
| Ralph Post Office (historical) | Post Office | 336 | Delaware | 40 07 55 N | 082 46 50 W |
| Ralston Cemetery | Cemetery | 277 | Brown | 38 56 25 N | 083 56 36 W |
| Ralston Cemetery | Cemetery | 222 | Ross | 39 16 19 N | 083 03 20 W |
| Ralston Knob | Summit | 430 | Richland | 40 46 46 N | 082 38 12 W |
| Ralston Run | Stream | | Jefferson | 40 31 07 N | 080 49 53 W |
| Ralston Run | Stream | | Ross | 39 17 37 N | 083 02 44 W |
| Ralston Run School (historical) | School | 227 | Ross | 39 15 37 N | 083 03 02 W |
| Ralston School (historical) | School | 241 | Pike | 39 10 31 N | 083 10 15 W |
| Ram Island | Island | 174 | Lake | 41 44 06 N | 081 16 13 W |
| Ramah School | School | 281 | Cuyahoga | 41 25 47 N | 081 33 57 W |
| Ramco Plaza Shopping Center | Locale | 187 | Lucas | 41 43 12 N | 083 35 18 W |
| Ramp Creek | Stream | | Licking | 40 00 58 N | 082 26 52 W |
| Ramsey | Populated Place | 295 | Jefferson | 40 11 34 N | 080 50 00 W |
| Ramsey Post Office (historical) | Post Office | 307 | Jefferson | 40 11 35 N | 080 49 59 W |
| Ramsey School (historical) | School | 285 | Miami | 39 59 54 N | 084 04 42 W |
| Ramsey School (historical) | School | 317 | Preble | 39 37 35 N | 084 44 27 W |
| Ramseyer Hall | Building | 232 | Franklin | 40 00 12 N | 083 00 35 W |
| Ranch Gardens (subdivision) | Populated Place | 189 | Wood | 41 35 47 N | 083 34 21 W |
| Ranch Wood (subdivision) | Populated Place | 180 | Erie | 41 25 44 N | 082 40 46 W |
| Ranchport Airport | Airport | 196 | Wood | 41 28 55 N | 083 31 50 W |
| Ranchwood Elementary School | School | 433 | Richland | 40 43 53 N | 082 31 40 W |
| Rand Cemetery | Cemetery | 345 | Trumbull | 41 18 42 N | 080 41 32 W |
| Randall | Populated Place | 320 | Cuyahoga | 41 25 30 N | 081 31 35 W |
| Randall Cemetery | Cemetery | 240 | Seneca | 41 03 53 N | 083 09 08 W |
| Randall Corners Shopping Center | Locale | 316 | Cuyahoga | 41 25 43 N | 081 31 28 W |
| Randall Park Mall Shopping Center | Locale | 319 | Cuyahoga | 41 25 54 N | 081 31 51 W |
| Randall Park Racetrack (historical) | Locale | 319 | Cuyahoga | 41 25 53 N | 081 31 52 W |
| Randall Racetrack | Locale | 318 | Cuyahoga | 41 25 55 N | 081 31 44 W |
| Randall Run | Stream | | Adams | 38 46 30 N | 083 21 43 W |
| Randall Run | Stream | | Warren | 39 24 37 N | 084 06 05 W |
| Randall Terrace | Populated Place | 207 | Ross | 39 19 41 N | 083 00 55 W |
| Randerson Cemetery | Cemetery | 273 | Vinton | 39 14 08 N | 082 35 19 W |
| Randerson Church | Church | 272 | Vinton | 39 14 07 N | 082 35 16 W |
| Randle | Populated Place | 235 | Coshocton | 40 18 48 N | 081 55 59 W |
| Randle Bridge | Bridge | 224 | Coshocton | 40 14 52 N | 081 52 19 W |
| Randolph | Populated Place | 351 | Portage | 41 01 58 N | 081 14 54 W |
| Randolph Christian Church | Church | 357 | Portage | 41 02 07 N | 081 14 54 W |
| Randolph Ditch | Canal | 346 | Portage | 41 01 20 N | 081 14 47 W |
| Randolph Hillside Cemetery | Cemetery | 358 | Portage | 41 02 08 N | 081 16 06 W |
| Randolph Landing | Populated Place | 183 | Meigs | 39 07 33 N | 081 44 51 W |
| Randolph Plaza Shopping Center | Locale | 259 | Montgomery | 39 50 48 N | 084 16 02 W |
| Randolph Post Office | Post Office | 352 | Portage | 41 02 00 N | 081 14 54 W |
| Randolph Run | Stream | | Columbiana | 40 35 34 N | 080 44 29 W |
| Range | Populated Place | 309 | Madison | 39 43 55 N | 083 25 29 W |
| Range Cemetery | Cemetery | 321 | Madison | 39 43 55 N | 083 27 54 W |
| Range Post Office (historical) | Post Office | 309 | Madison | 39 43 55 N | 083 25 30 W |
| Ranger Heliport | Airport | 243 | Franklin | 39 59 56 N | 083 02 29 W |
| Rangle Run | Stream | | Brown | 38 46 59 N | 083 54 36 W |
| Ranker Knob | Summit | 367 | Monroe | 39 47 53 N | 081 18 03 W |
| Rankin Cemetery | Cemetery | 227 | Lawrence | 38 38 17 N | 082 29 31 W |
| Rankin Church | Church | 379 | Harrison | 40 13 05 N | 081 05 44 W |
| Rankin Creek | Stream | | Lawrence | 38 28 58 N | 082 27 60 W |
| Rankin Elementary School | School | 323 | Summit | 41 05 28 N | 081 33 21 W |
| Rankin Historic District | Park | 168 | Lawrence | 38 32 00 N | 082 40 48 W |
| Rankin House State Memorial | Park | 256 | Brown | 38 45 02 N | 083 50 37 W |
| Rankin Methodist Episcopal Cemetery | Cemetery | 379 | Harrison | 40 13 03 N | 081 05 46 W |
| Rannells Creek | Stream | | Guernsey | 39 50 53 N | 081 39 28 W |
| Ransom | Populated Place | 301 | Preble | 39 44 39 N | 084 34 51 W |
| Ransom Barr Elementary School | School | 326 | Stark | 40 50 57 N | 081 20 52 W |
| Ransom Ditch | Canal | 192 | Erie | 41 22 49 N | 082 41 26 W |
| Ransom Hall | Building | 329 | Knox | 40 22 28 N | 082 23 48 W |
| Ransoms Run | Stream | | Knox | 40 22 37 N | 082 22 15 W |
| Raper Chapel | Church | 314 | Darke | 40 16 01 N | 084 46 39 W |
| Raper Chapel Cemetery | Cemetery | 314 | Darke | 40 16 03 N | 084 46 39 W |
| Raper Chapel Cemetery | Cemetery | 263 | Miami | 40 04 41 N | 084 12 20 W |
| Raper Chapel Methodist Church (historical) | Church | 264 | Miami | 40 04 40 N | 084 12 17 W |
| Rapid Run | Stream | | Hamilton | 39 05 58 N | 084 40 17 W |
| Rapid Run | Stream | | Warren | 39 33 33 N | 084 13 21 W |
| Rapid Run Park | Park | 253 | Hamilton | 39 07 03 N | 084 35 18 W |
| Rapp Cemetery | Cemetery | 286 | Lawrence | 38 37 11 N | 082 24 23 W |
| Rapp Hollow | Valley | | Pike | 38 58 50 N | 083 00 04 W |
| Rapps Cemetery | Cemetery | 225 | Clermont | 39 08 34 N | 084 09 09 W |
| Rappsburg | Populated Place | 277 | Lawrence | 38 36 59 N | 082 24 20 W |
| Rappsburg Post Office (historical) | Post Office | 279 | Lawrence | 38 37 00 N | 082 24 20 W |
| Rarden | Populated Place | 189 | Scioto | 38 55 20 N | 083 14 33 W |
| Rarden Creek | Stream | | Scioto | 38 55 15 N | 083 15 05 W |