Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Scottown Bridge | Bridge | 179 | Lawrence | 38 32 52 N | 082 22 50 W |
| Scottown Post Office | Post Office | 176 | Lawrence | 38 33 00 N | 082 23 20 W |
| Scotts Cemetery | Cemetery | 192 | Erie | 41 21 15 N | 082 36 10 W |
| Scotts Crossing | Populated Place | 237 | Allen | 40 49 04 N | 084 16 22 W |
| Scotts Crossing Post Office (historical) | Post Office | 237 | Allen | 40 49 05 N | 084 16 20 W |
| Scotts Ridge Cemetery | Cemetery | 316 | Washington | 39 32 16 N | 081 18 49 W |
| Scotts Ridge Church | Church | 315 | Washington | 39 32 15 N | 081 18 47 W |
| Scotts Run | Stream | | Butler | 39 30 19 N | 084 39 29 W |
| Scottwood Community Church | Church | 236 | Franklin | 39 56 26 N | 082 54 22 W |
| Scottwood Elementary School | School | 236 | Franklin | 39 56 25 N | 082 54 17 W |
| Scovel Hall | Building | 328 | Wayne | 40 48 34 N | 081 56 12 W |
| Scranton Elementary School | School | 207 | Cuyahoga | 41 28 28 N | 081 41 51 W |
| Scranton Road Baptist Church | Church | 206 | Cuyahoga | 41 28 13 N | 081 41 48 W |
| Scratch Hollow | Valley | | Pike | 39 02 51 N | 082 53 06 W |
| Scripps Hall | Building | 220 | Athens | 39 19 33 N | 082 06 04 W |
| Scroggsfield | Populated Place | 347 | Carroll | 40 34 40 N | 080 57 39 W |
| Scroggsfield Cemetery | Cemetery | 354 | Carroll | 40 34 30 N | 080 57 56 W |
| Scroggsfield Church | Church | 349 | Carroll | 40 34 28 N | 080 57 51 W |
| Scroggsfield Post Office (historical) | Post Office | 347 | Carroll | 40 34 40 N | 080 57 39 W |
| Scrub Ridge | Populated Place | 263 | Adams | 38 52 01 N | 083 23 35 W |
| Scudder | Populated Place | 273 | Mercer | 40 34 29 N | 084 44 47 W |
| Scudder Center School | School | 162 | Scioto | 38 44 02 N | 083 00 04 W |
| Scudder Post Office (historical) | Post Office | 273 | Mercer | 40 34 30 N | 084 44 45 W |
| Scudder School (historical) | School | 264 | Mercer | 40 34 02 N | 084 44 46 W |
| Sea Shell Marina | Locale | 198 | Cuyahoga | 41 28 56 N | 081 49 57 W |
| Seaborn Elementary School | School | 317 | Trumbull | 41 08 21 N | 080 45 25 W |
| SeaGate Centre | Building | 181 | Lucas | 41 38 57 N | 083 32 11 W |
| Seagate Helistop | Airport | 183 | Lucas | 41 39 15 N | 083 31 53 W |
| Seagrave | Populated Place | 232 | Franklin | 40 00 24 N | 083 02 03 W |
| Seagrave Post Office (historical) | Post Office | 232 | Franklin | 40 00 25 N | 083 02 05 W |
| Seal | Populated Place | 269 | Wyandot | 40 52 37 N | 083 09 02 W |
| Sealover (historical) | Populated Place | 213 | Muskingum | 39 52 20 N | 081 57 56 W |
| Sealover Post Office (historical) | Post Office | 211 | Muskingum | 39 52 20 N | 081 57 54 W |
| Sealover Post Office (historical) | Post Office | 211 | Noble | 39 52 20 N | 081 57 54 W |
| Seaman | Populated Place | 276 | Adams | 38 56 31 N | 083 34 21 W |
| Seaman Elementary School | School | 279 | Adams | 38 56 13 N | 083 34 20 W |
| Seaman Park | Park | 322 | Greene | 39 39 18 N | 083 45 20 W |
| Seaman Post Office | Post Office | 279 | Adams | 38 56 29 N | 083 34 26 W |
| Seamersville | Populated Place | 227 | Van Wert | 40 55 56 N | 084 25 01 W |
| Seamersville Post Office (historical) | Post Office | | Van Wert | 40 55 55 N | 084 25 00 W |
| Seans Woods (subdivision) | Populated Place | 302 | Clark | 39 57 41 N | 083 48 20 W |
| Searfoss Elementary School | School | 353 | Licking | 40 08 50 N | 082 40 52 W |
| Searles Marsh | Swamp | 175 | Lucas | 41 37 37 N | 083 12 30 W |
| Sears Cemetery | Cemetery | 284 | Montgomery | 39 37 12 N | 084 08 23 W |
| Sears Library | Building | 210 | Cuyahoga | 41 30 10 N | 081 36 30 W |
| Seasongoer Square | Park | 219 | Hamilton | 39 09 11 N | 084 29 05 W |
| Seasons Road Industrial Park | Locale | 309 | Summit | 41 12 00 N | 081 28 51 W |
| Seawright (historical) | Populated Place | 214 | Muskingum | 39 53 55 N | 081 51 07 W |
| Sebald Park | Park | 267 | Butler | 39 31 20 N | 084 27 24 W |
| Sebastian | Populated Place | 284 | Mercer | 40 26 39 N | 084 30 60 W |
| Sebastian Post Office (historical) | Post Office | 283 | Mercer | 40 26 40 N | 084 30 60 W |
| Sebring | Populated Place | 335 | Mahoning | 40 55 22 N | 081 01 08 W |
| Sebring Church of the Nazarene | Church | 333 | Mahoning | 40 55 29 N | 081 01 47 W |
| Sebring Country Club | Locale | 323 | Portage | 40 59 20 N | 081 00 20 W |
| Sebring Friends Church | Church | 352 | Mahoning | 40 54 58 N | 081 01 54 W |
| Sebring Post Office | Post Office | 335 | Mahoning | 40 55 20 N | 081 01 09 W |
| Sebring Presbyterian Church | Church | 334 | Mahoning | 40 55 32 N | 081 01 16 W |
| Sebring United Methodist Church | Church | 335 | Mahoning | 40 55 32 N | 081 01 09 W |
| Seccaium Park | Park | 321 | Crawford | 40 45 59 N | 082 53 02 W |
| Seceder Cemetery | Cemetery | 268 | Franklin | 39 56 26 N | 082 47 38 W |
| Seceder Cemetery | Cemetery | 379 | Jefferson | 40 10 30 N | 080 47 36 W |
| Seceders Cemetery | Cemetery | 372 | Carroll | 40 32 00 N | 081 08 40 W |
| Seceders Corners Cemetery | Cemetery | 317 | Trumbull | 41 09 43 N | 080 38 06 W |
| Second Avenue Elementary School | School | 234 | Franklin | 39 58 59 N | 083 00 09 W |
| Second Baptist Church | Church | 263 | Allen | 40 44 19 N | 084 06 43 W |
| Second Baptist Church | Church | 198 | Butler | 39 30 50 N | 084 24 13 W |
| Second Baptist Church | Church | 179 | Butler | 39 23 15 N | 084 33 46 W |
| Second Baptist Church | Church | 327 | Champaign | 40 04 21 N | 083 33 18 W |
| Second Baptist Church | Church | 311 | Clark | 39 55 02 N | 083 48 55 W |
| Second Baptist Church | Church | 211 | Columbiana | 40 37 46 N | 080 33 24 W |
| Second Baptist Church | Church | 304 | Crawford | 40 48 15 N | 082 57 52 W |
| Second Baptist Church | Church | 219 | Defiance | 41 16 57 N | 084 19 32 W |
| Second Baptist Church | Church | 183 | Erie | 41 27 12 N | 082 42 52 W |
| Second Baptist Church | Church | 296 | Fayette | 39 32 31 N | 083 25 58 W |
| Second Baptist Church | Church | 244 | Franklin | 39 58 08 N | 082 58 37 W |
| Second Baptist Church | Church | 244 | Guernsey | 40 01 49 N | 081 35 57 W |
| Second Baptist Church | Church | 181 | Hamilton | 39 09 21 N | 084 23 38 W |
| Second Baptist Church | Church | 182 | Hamilton | 39 10 40 N | 084 28 25 W |
| Second Baptist Church | Church | 261 | Hamilton | 39 12 30 N | 084 23 11 W |
| Second Baptist Church | Church | 300 | Huron | 41 05 11 N | 082 23 31 W |
| Second Baptist Church | Church | 233 | Jefferson | 40 21 36 N | 080 37 15 W |
| Second Baptist Church | Church | 247 | Licking | 40 03 05 N | 082 23 59 W |
| Second Baptist Church | Church | 185 | Lorain | 41 27 31 N | 082 10 20 W |
| Second Baptist Church | Church | 186 | Lucas | 41 38 30 N | 083 31 07 W |
| Second Baptist Church | Church | 332 | Medina | 41 08 31 N | 081 52 16 W |
| Second Baptist Church | Church | 211 | Pickaway | 39 35 54 N | 082 56 54 W |
| Second Baptist Church | Church | 320 | Stark | 40 55 27 N | 081 04 42 W |
| Second Baptist Church | Church | 303 | Summit | 41 04 11 N | 081 31 37 W |
| Second Baptist Church | Church | 265 | Trumbull | 41 13 18 N | 080 49 06 W |
| Second Baptist Church | Church | 222 | Warren | 39 33 33 N | 084 18 03 W |
| Second Baptist Church | Church | 271 | Wayne | 40 47 43 N | 081 56 34 W |
| Second Baptist Tabernacle | Church | 316 | Clinton | 39 26 28 N | 083 49 23 W |
| Second Christian Church | Church | 332 | Mahoning | 41 07 38 N | 080 34 40 W |
| Second Christian Church | Church | 275 | Trumbull | 41 14 03 N | 080 49 50 W |
| Second Church of Christ | Church | 382 | Belmont | 39 59 18 N | 081 10 45 W |
| Second Church of Christ | Church | 228 | Columbiana | 40 38 08 N | 080 32 52 W |
| Second Church of Christ | Church | 263 | Licking | 40 03 06 N | 082 25 35 W |
| Second Church of Christ Scientist | Church | 230 | Franklin | 39 58 48 N | 083 00 21 W |
| Second Church of Christ Scientist | Church | 241 | Hamilton | 39 08 03 N | 084 31 15 W |
| Second Church of Christ Scientist | Church | 187 | Lucas | 41 39 49 N | 083 33 17 W |
| Second Church of Christ Scientist | Church | 234 | Montgomery | 39 46 10 N | 084 12 15 W |
| Second Church of Christ Scientist (historical) | Church | 205 | Cuyahoga | 41 30 13 N | 081 38 07 W |
| Second Community Baptist Church | Church | 247 | Hamilton | 39 07 29 N | 084 29 46 W |
| Second Community Church | Church | 237 | Franklin | 39 56 58 N | 083 03 39 W |
| Second Congregational Church | Church | 248 | Lorain | 41 17 29 N | 082 13 12 W |
| Second Congregational Church (historical) | Church | 302 | Summit | 41 05 01 N | 081 30 55 W |
| Second Congregational United Church of Christ | Church | 192 | Ashtabula | 41 53 53 N | 080 48 17 W |
| Second Corinthian Baptist Church | Church | 216 | Hamilton | 39 09 07 N | 084 28 54 W |
| Second Creek | Stream | | Warren | 39 20 09 N | 084 06 05 W |
| Second Creek | Stream | | Washington | 39 27 08 N | 081 27 32 W |