Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Starrett Ridge | Ridge | 299 | Vinton | 39 22 07 N | 082 19 21 W |
| Starrett Run | Stream | | Shelby | 40 16 58 N | 084 09 38 W |
| Starrs Corners | Populated Place | 312 | Mahoning | 41 01 28 N | 080 42 41 W |
| Start High School | School | 186 | Lucas | 41 42 05 N | 083 35 36 W |
| Startle (historical) | Populated Place | 245 | Jefferson | 40 11 38 N | 080 49 09 W |
| Startle Post Office (historical) | Post Office | 248 | Jefferson | 40 11 40 N | 080 49 09 W |
| Starvaggi Hall | Building | 318 | Jefferson | 40 22 35 N | 080 37 21 W |
| Starve Island | Island | 174 | Ottawa | 41 37 40 N | 082 49 20 W |
| Starve Island Reef | Bar | 174 | Ottawa | 41 36 46 N | 082 48 56 W |
| State Avenue Church of Christ | Church | 160 | Hamilton | 39 06 18 N | 084 33 11 W |
| State Avenue United Methodist Church | Church | 158 | Hamilton | 39 06 11 N | 084 33 14 W |
| State Cemetery | Cemetery | 185 | Hamilton | 39 09 05 N | 084 45 13 W |
| State Hospital Cemetery | Cemetery | 267 | Allen | 40 46 24 N | 084 05 41 W |
| State Line (historical) | Populated Place | 316 | Columbiana | 40 50 11 N | 080 31 09 W |
| State Line Cemetery | Cemetery | 267 | Mercer | 40 31 40 N | 084 48 07 W |
| State Line Church | Church | 291 | Ashtabula | 41 51 48 N | 080 31 11 W |
| State Line Ditch | Canal | 231 | Paulding | 41 00 52 N | 084 48 10 W |
| State of Ohio | Civil | 290 | Delaware | 40 15 01 N | 083 00 01 W |
| State Road | Populated Place | 285 | Trumbull | 41 18 01 N | 080 53 52 W |
| State Road Bridge | Bridge | 213 | Ashtabula | 41 53 11 N | 080 37 14 W |
| State Road Church | Church | 299 | Montgomery | 39 37 47 N | 084 27 37 W |
| State Road Elementary School | School | 215 | Ashtabula | 41 52 03 N | 080 46 19 W |
| State Road Elementary School | School | 274 | Cuyahoga | 41 23 48 N | 081 42 33 W |
| State Road Mall Shopping Center | Locale | 311 | Summit | 41 08 58 N | 081 30 25 W |
| State Road Park | Park | 283 | Cuyahoga | 41 23 29 N | 081 42 58 W |
| State Road Post Office (historical) | Post Office | 286 | Trumbull | 41 18 00 N | 080 53 54 W |
| State Route 800 Dam | Dam | 293 | Belmont | 40 02 36 N | 081 09 35 W |
| State Route 800 Reservoir | Reservoir | 293 | Belmont | 40 02 36 N | 081 09 35 W |
| State Run | Stream | | Pickaway | 39 34 32 N | 083 07 33 W |
| State Soldiers Home | Building | 186 | Erie | 41 25 09 N | 082 41 02 W |
| State Street Cemetery | Cemetery | 232 | Athens | 39 19 58 N | 082 06 22 W |
| State Street Cemetery | Cemetery | 247 | Tuscarawas | 40 16 27 N | 081 35 53 W |
| State Street Elementary School | School | 206 | Lake | 41 43 12 N | 081 14 15 W |
| State Street Middle School | School | 372 | Stark | 40 54 08 N | 081 06 12 W |
| Stateline Creek | Stream | | Columbiana | 40 47 29 N | 080 31 20 W |
| Station 15 | Populated Place | 261 | Harrison | 40 23 19 N | 081 15 34 W |
| Station A Cleveland Post Office | Post Office | 210 | Cuyahoga | 41 28 28 N | 081 43 53 W |
| Station Creek | Stream | | Warren | 39 24 28 N | 084 17 26 W |
| Station H Cleveland Post Office | Post Office | 189 | Cuyahoga | 41 32 24 N | 081 36 57 W |
| Station Post Office (historical) | Post Office | 262 | Harrison | 40 23 20 N | 081 15 34 W |
| Station Road Bridge | Bridge | 191 | Cuyahoga | 41 19 10 N | 081 35 15 W |
| Statler Cemetery | Cemetery | 341 | Madison | 39 57 54 N | 083 30 45 W |
| Statler Ditch | Canal | 338 | Preble | 39 44 12 N | 084 45 08 W |
| Staub Ditch | Canal | 233 | Seneca | 41 07 32 N | 083 16 33 W |
| Stauffer Cemetery | Cemetery | 352 | Wayne | 40 48 03 N | 081 51 39 W |
| Staunton | Populated Place | 299 | Fayette | 39 28 31 N | 083 28 60 W |
| Staunton | Populated Place | 254 | Miami | 40 02 24 N | 084 10 51 W |
| Staunton Cemetery | Cemetery | 299 | Fayette | 39 28 33 N | 083 28 51 W |
| Staunton Cemetery | Cemetery | 254 | Miami | 40 02 24 N | 084 10 41 W |
| Staunton Elementary School | School | 302 | Fayette | 39 28 36 N | 083 29 01 W |
| Staunton Elementary School | School | 265 | Miami | 40 04 28 N | 084 11 45 W |
| Staunton Post Office | Post Office | 298 | Fayette | 39 28 30 N | 083 29 00 W |
| Staunton Street School | School | 271 | Miami | 40 08 27 N | 084 13 53 W |
| Staunton United Methodist Church | Church | 300 | Fayette | 39 28 33 N | 083 28 52 W |
| Stautzenberger College | School | 246 | Hancock | 41 03 05 N | 083 37 08 W |
| Steam Corners | Populated Place | 431 | Morrow | 40 40 52 N | 082 39 52 W |
| Steam Corners Post Office (historical) | Post Office | 430 | Morrow | 40 40 50 N | 082 39 50 W |
| Steam Corners United Methodist Church | Church | 432 | Morrow | 40 40 55 N | 082 39 51 W |
| Steam Furnace | Populated Place | 256 | Adams | 38 54 21 N | 083 24 30 W |
| Steam Furnace Cemetery | Cemetery | 256 | Adams | 38 54 32 N | 083 24 28 W |
| Steam Furnace School (historical) | School | 255 | Adams | 38 54 31 N | 083 24 27 W |
| Steamboat Rock | Pillar | 279 | Greene | 39 47 45 N | 083 50 09 W |
| Steamburg | Populated Place | 308 | Ashtabula | 41 42 50 N | 080 37 05 W |
| Steamburg Church (historical) | Church | 308 | Ashtabula | 41 42 45 N | 080 37 00 W |
| Steamburg Post Office (historical) | Post Office | 307 | Ashtabula | 41 42 50 N | 080 37 04 W |
| Steamtown | Populated Place | 349 | Noble | 39 48 59 N | 081 21 35 W |
| Stearns Crest | Populated Place | 231 | Wood | 41 11 59 N | 083 25 38 W |
| Stebbins High School | School | 238 | Montgomery | 39 47 50 N | 084 07 41 W |
| Stedke School (historical) | School | 256 | Mercer | 40 37 33 N | 084 39 59 W |
| Steeb Hall | Building | 229 | Franklin | 39 59 45 N | 083 00 33 W |
| Steel High School | School | 199 | Lorain | 41 24 11 N | 082 13 21 W |
| Steel Point | Populated Place | 316 | Darke | 40 01 11 N | 084 32 50 W |
| Steel Run | Populated Place | 195 | Washington | 39 29 37 N | 081 15 46 W |
| Steel Run | Stream | | Richland | 40 37 00 N | 082 33 58 W |
| Steel Run | Stream | | Washington | 39 29 34 N | 081 15 44 W |
| Steel School | School | 267 | Hamilton | 39 12 17 N | 084 33 32 W |
| Steel Trap Creek | Stream | | Lawrence | 38 30 34 N | 082 28 31 W |
| Steele Crossing | Locale | 347 | Geauga | 41 25 33 N | 081 08 42 W |
| Steele Ditch | Canal | 295 | Wayne | 40 57 35 N | 081 51 52 W |
| Steele High School (historical) | School | 223 | Montgomery | 39 45 48 N | 084 11 34 W |
| Steeles Corners Christian Church | Church | | Summit | 41 10 49 N | 081 30 32 W |
| Steeles Hill-Grafton Hill Historic District | Park | 234 | Montgomery | 39 46 03 N | 084 12 20 W |
| Steelton | Populated Place | 225 | Franklin | 39 55 15 N | 082 59 05 W |
| Steep Gap | Valley | | Ross | 39 14 28 N | 083 08 49 W |
| Steep Hollow | Valley | | Warren | 39 20 58 N | 084 03 26 W |
| Steep Run | Stream | | Belmont | 40 06 09 N | 080 50 22 W |
| Steeple Chase Shopping Center | Locale | 340 | Summit | 41 07 40 N | 081 26 26 W |
| Steer Meadow Park | Park | 241 | Hamilton | 39 12 28 N | 084 19 44 W |
| Stefans Run | Stream | | Summit | 41 12 36 N | 081 28 16 W |
| Steffee Run | Stream | | Coshocton | 40 13 20 N | 082 04 14 W |
| Steffel Ditch | Canal | 218 | Paulding | 41 10 22 N | 084 21 57 W |
| Steiger Ridge | Ridge | 402 | Monroe | 39 49 00 N | 080 52 10 W |
| Stein Memorial Library | Building | 243 | Franklin | 39 58 12 N | 082 55 38 W |
| Steiner School (historical) | School | 316 | Tuscarawas | 40 27 14 N | 081 34 42 W |
| Steiner Youth Center | Building | 387 | Medina | 41 01 21 N | 081 42 46 W |
| Steinersville | Populated Place | 203 | Belmont | 39 52 08 N | 080 49 52 W |
| Steinman (historical) | Populated Place | 291 | Mercer | 40 22 03 N | 084 29 37 W |
| Steitz School (historical) | School | 334 | Tuscarawas | 40 28 16 N | 081 34 50 W |
| Stella | Populated Place | 322 | Vinton | 39 20 55 N | 082 33 07 W |
| Stella Park | Park | 195 | Hamilton | 39 08 48 N | 084 28 55 W |
| Steller Field | Park | 204 | Wood | 41 22 50 N | 083 37 44 W |
| Stelvideo | Populated Place | 311 | Darke | 40 09 07 N | 084 33 04 W |
| Stelvideo Cemetery | Cemetery | 306 | Darke | 40 09 56 N | 084 33 06 W |
| Stelvideo Post Office (historical) | Post Office | 310 | Darke | 40 09 07 N | 084 33 05 W |
| Stemple | Populated Place | 319 | Carroll | 40 37 05 N | 081 05 22 W |
| Step Church | Church | 352 | Adams | 38 43 02 N | 083 18 13 W |
| Step Church Cemetery | Cemetery | 355 | Adams | 38 43 01 N | 083 18 11 W |
| Stephen Bell Elementary School | School | 278 | Greene | 39 38 29 N | 084 05 39 W |
| Stephen Brown Park | Park | 289 | Shelby | 40 16 45 N | 084 09 30 W |
| Stephen E Howe Public School | School | 192 | Cuyahoga | 41 31 49 N | 081 36 26 W |