Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Roswell | Populated Place | 288 | Tuscarawas | 40 28 33 N | 081 20 58 W |
| Roswell Post Office (historical) | Post Office | | Tuscarawas | 40 28 35 N | 081 21 00 W |
| Roszmann Field | Park | 294 | Fayette | 39 32 06 N | 083 26 55 W |
| Rotary Park | Park | 230 | Defiance | 41 18 47 N | 084 43 53 W |
| Rotary Park | Park | 229 | Fulton | 41 33 21 N | 084 08 17 W |
| Rotary Park | Park | 244 | Greene | 39 42 56 N | 084 01 09 W |
| Roth Cemetery | Cemetery | 195 | Lucas | 41 33 22 N | 083 45 15 W |
| Roth Middle School at Gardendale | School | | Montgomery | 39 44 58 N | 084 15 11 W |
| Rothenberg Elementary School | School | 174 | Hamilton | 39 06 50 N | 084 30 45 W |
| Rothgeb Cemetery | Cemetery | 175 | Gallia | 38 54 13 N | 082 08 34 W |
| Roths Landing | Locale | 152 | Brown | 38 38 52 N | 083 43 29 W |
| Roudebush Cemetery | Cemetery | 372 | Carroll | 40 42 35 N | 080 57 22 W |
| Roudebush Hall | Building | 283 | Butler | 39 30 34 N | 084 44 05 W |
| Roudebush School (historical) | School | 387 | Carroll | 40 36 15 N | 081 02 01 W |
| Rough and Ready School (historical) | School | 284 | Guernsey | 39 57 39 N | 081 42 27 W |
| Rough Run | Stream | | Columbiana | 40 43 00 N | 080 34 30 W |
| Roumanian Baptist Church | Church | 206 | Cuyahoga | 41 29 05 N | 081 43 32 W |
| Round Bottom | Populated Place | 370 | Monroe | 39 44 06 N | 080 58 09 W |
| Round Bottom Cemetery | Cemetery | 191 | Washington | 39 33 16 N | 081 35 09 W |
| Round Bottom Church (historical) | Church | 192 | Washington | 39 33 18 N | 081 35 11 W |
| Round Island | Island | 274 | Fairfield | 39 55 11 N | 082 29 25 W |
| Round Knob | Summit | 433 | Columbiana | 40 40 19 N | 080 40 20 W |
| Round Lake | Lake | 282 | Wayne | 40 40 19 N | 082 08 42 W |
| Round Reef | Bar | 174 | Ottawa | 41 37 00 N | 082 59 17 W |
| Round-up Lake | Lake | 355 | Portage | 41 18 18 N | 081 16 14 W |
| Roundhead | Populated Place | 306 | Hardin | 40 33 34 N | 083 50 07 W |
| Roundhead Elementary School | School | 307 | Hardin | 40 33 42 N | 083 50 22 W |
| Roundhead Post Office | Post Office | 305 | Hardin | 40 33 35 N | 083 50 05 W |
| Roundhead United Methodist Church | Church | 305 | Hardin | 40 33 36 N | 083 50 14 W |
| Roundtop | Summit | 371 | Highland | 39 12 28 N | 083 22 19 W |
| Roundtop | Summit | 359 | Pike | 39 07 59 N | 083 22 03 W |
| Roundtop | Summit | 356 | Ross | 39 14 41 N | 083 18 55 W |
| Roundtop | Summit | 387 | Ross | 39 17 25 N | 083 19 42 W |
| Roundtop School (historical) | School | 223 | Ross | 39 17 03 N | 083 12 33 W |
| Rousculp | Populated Place | 292 | Allen | 40 39 57 N | 084 05 06 W |
| Rousculp Church | Church | 288 | Allen | 40 39 18 N | 084 05 24 W |
| Rousculp Post Office (historical) | Post Office | 292 | Allen | 40 40 00 N | 084 05 05 W |
| Rouse School (historical) | School | 213 | Ross | 39 26 57 N | 083 01 27 W |
| Rouses Landing | Locale | 171 | Meigs | 38 56 33 N | 081 48 19 W |
| Roush Cemetery | Cemetery | 177 | Gallia | 38 55 32 N | 082 08 15 W |
| Roush Cemetery | Cemetery | 177 | Gallia | 38 57 06 N | 082 07 32 W |
| Roush Run | Stream | | Gallia | 38 51 06 N | 082 24 20 W |
| Roush School (historical) | School | 275 | Adams | 38 42 56 N | 083 37 35 W |
| Route 327 Church | Church | 188 | Jackson | 39 11 51 N | 082 40 11 W |
| Routzong Preserve | Park | 312 | Darke | 40 04 25 N | 084 32 07 W |
| Rowan Hall | Building | 274 | Butler | 39 30 27 N | 084 43 60 W |
| Rowdyville (historical) | Populated Place | 283 | Miami | 40 05 43 N | 084 20 35 W |
| Rowe Cemetery | Cemetery | 269 | Fayette | 39 30 15 N | 083 18 44 W |
| Rowe Cemetery | Cemetery | 242 | Ross | 39 27 51 N | 083 14 17 W |
| Rowe Middle School | School | 201 | Ashtabula | 41 56 33 N | 080 32 31 W |
| Rowe School (historical) | School | 358 | Licking | 40 06 51 N | 082 42 08 W |
| Rowe School (historical) | School | 254 | Ross | 39 28 52 N | 083 15 46 W |
| Rowell Cemetery | Cemetery | 201 | Athens | 39 18 12 N | 081 51 10 W |
| Rowell Run | Stream | | Athens | 39 18 13 N | 081 50 45 W |
| Rowenton | Populated Place | 306 | Ashtabula | 41 40 49 N | 080 43 21 W |
| Rowenton Post Office (historical) | Post Office | 306 | Ashtabula | 41 40 50 N | 080 43 19 W |
| Rowland (historical) | Populated Place | 219 | Morgan | 39 44 40 N | 081 46 17 W |
| Rowland Cemetery | Cemetery | 329 | Stark | 40 47 35 N | 081 21 11 W |
| Rowland Cemetery | Cemetery | 264 | Wyandot | 40 47 16 N | 083 23 60 W |
| Rowland Elementary School | School | 309 | Cuyahoga | 41 30 33 N | 081 31 30 W |
| Rowland Landing | Locale | 258 | Washington | 39 32 00 N | 081 15 00 W |
| Rowland Post Office (historical) | Post Office | 219 | Morgan | 39 44 40 N | 081 46 19 W |
| Rowland School (historical) | School | 277 | Huron | 41 11 47 N | 082 22 14 W |
| Rowlen School (historical) | School | 267 | Pickaway | 39 40 30 N | 083 12 34 W |
| Rowlesville | Populated Place | 210 | Gallia | 39 00 35 N | 082 17 03 W |
| Rowlesville Post Office (historical) | Post Office | 208 | Gallia | 39 00 35 N | 082 17 05 W |
| Rowley Mound | Summit | 348 | Knox | 40 28 25 N | 082 32 35 W |
| Rowley Run | Stream | | Columbiana | 40 42 11 N | 080 47 19 W |
| Rowsburg | Populated Place | 335 | Ashland | 40 51 31 N | 082 09 21 W |
| Rowsburg Cemetery | Cemetery | 329 | Ashland | 40 51 33 N | 082 09 17 W |
| Roxabell | Populated Place | 229 | Ross | 39 23 05 N | 083 11 16 W |
| Roxabell Post Office (historical) | Post Office | 229 | Ross | 39 23 05 N | 083 11 15 W |
| Roxanna | Populated Place | 230 | Greene | 39 34 57 N | 084 00 58 W |
| Roxanna Cemetery | Cemetery | 267 | Greene | 39 35 12 N | 084 00 32 W |
| Roxanna Post Office (historical) | Post Office | 229 | Greene | 39 34 55 N | 084 00 60 W |
| Roxboro Elementary School | School | 271 | Cuyahoga | 41 29 38 N | 081 35 19 W |
| Roxboro Junior High School | School | 269 | Cuyahoga | 41 29 39 N | 081 35 26 W |
| Roxbury | Populated Place | 197 | Morgan | 39 31 22 N | 081 44 53 W |
| Roxbury Elementary School | School | 312 | Cuyahoga | 41 22 26 N | 081 26 33 W |
| Roxbury Post Office (historical) | Post Office | 212 | Morgan | 39 31 20 N | 081 44 54 W |
| Roxford Methodist Episcopal Cemetery | Cemetery | 362 | Tuscarawas | 40 28 13 N | 081 18 31 W |
| Roxford United Methodist Church | Church | 371 | Tuscarawas | 40 28 15 N | 081 18 34 W |
| Roy Burkholder Farm Cemetery | Cemetery | 381 | Holmes | 40 33 09 N | 081 46 42 W |
| Roy E Holmes Elementary School | School | 316 | Clinton | 39 25 55 N | 083 50 55 W |
| Roy Rike Field | Park | 282 | Delaware | 40 17 41 N | 083 04 43 W |
| Royal | Populated Place | 222 | Vinton | 39 18 21 N | 082 34 23 W |
| Royal Assembly Church | Church | 238 | Franklin | 39 57 20 N | 082 58 24 W |
| Royal Crest Golf Course | Locale | 253 | Lorain | 41 19 04 N | 081 53 04 W |
| Royal Manor Elementary School | School | 252 | Franklin | 40 01 31 N | 082 53 52 W |
| Royal Oak Country Club | Locale | 265 | Clermont | 39 02 47 N | 084 16 15 W |
| Royal Oak Lake | Reservoir | 249 | Meigs | 39 02 24 N | 081 57 11 W |
| Royal Oak Lake Dam | Dam | 249 | Meigs | 39 02 24 N | 081 57 11 W |
| Royal Oaks Course Pond Number Two | Reservoir | 259 | Clermont | 39 02 36 N | 084 16 18 W |
| Royal Oaks Golf Course Pond Number One | Reservoir | 266 | Clermont | 39 02 48 N | 084 16 12 W |
| Royal Oaks Park | Park | 235 | Hamilton | 39 03 55 N | 084 23 56 W |
| Royal Plaza Shopping Center | Locale | 248 | Franklin | 40 01 08 N | 082 53 36 W |
| Royal Redeemer Lutheran Church | Church | 273 | Cuyahoga | 41 18 59 N | 081 46 30 W |
| Royal Ridge School | School | 298 | Cuyahoga | 41 22 01 N | 081 44 01 W |
| Royal Springs Estates | Populated Place | 278 | Warren | 39 34 43 N | 084 14 32 W |
| Royal View Elementary School | School | 375 | Cuyahoga | 41 19 07 N | 081 44 16 W |
| Royalton | Populated Place | 308 | Fairfield | 39 43 39 N | 082 45 60 W |
| Royalton Cemetery | Cemetery | 265 | Cuyahoga | 41 17 56 N | 081 45 21 W |
| Royalton Cemetery | Cemetery | 314 | Fairfield | 39 43 43 N | 082 45 46 W |
| Royalton Plaza Shopping Center | Locale | 366 | Cuyahoga | 41 18 52 N | 081 43 36 W |
| Royalton Post Office (historical) | Post Office | 308 | Fairfield | 39 43 40 N | 082 46 00 W |
| Royalton Road School | School | 371 | Cuyahoga | 41 18 48 N | 081 43 55 W |
| Royalview Elementary School | School | 191 | Lake | 41 37 54 N | 081 27 37 W |
| Royalview Park | Park | 279 | Cuyahoga | 41 22 07 N | 081 44 39 W |
| Royalview Picnic Area | Locale | 300 | Cuyahoga | 41 18 00 N | 081 48 12 W |
| Royalwood Centre Shopping Center | Locale | 371 | Cuyahoga | 41 19 15 N | 081 43 26 W |