Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Rockport Branch Cleveland Public Library | Building | 234 | Cuyahoga | 41 26 02 N | 081 47 24 W |
| Rockwell Library | Building | 338 | Portage | 41 09 09 N | 081 20 59 W |
| Rocky River City Hall | Building | 213 | Cuyahoga | 41 28 03 N | 081 51 12 W |
| Rocky River Public Library | Building | 207 | Cuyahoga | 41 28 37 N | 081 50 30 W |
| Rocky River Stables | Building | 194 | Cuyahoga | 41 26 09 N | 081 50 33 W |
| Rodman Hall | Building | 326 | Cuyahoga | 41 29 28 N | 081 31 52 W |
| Rodman Playhouse | Building | 367 | Stark | 40 54 22 N | 081 06 22 W |
| Rodman Public Library | Building | 347 | Stark | 40 55 08 N | 081 06 08 W |
| Roesch Library | Building | 240 | Montgomery | 39 44 24 N | 084 10 44 W |
| Romero International Center | Building | 194 | Hamilton | 39 09 02 N | 084 28 26 W |
| Root and McBride-Bradley Building | Building | 196 | Cuyahoga | 41 30 04 N | 081 42 00 W |
| Ropp Hall | Building | 251 | Allen | 40 53 38 N | 083 53 52 W |
| Rosary Care Center | Building | 202 | Lucas | 41 42 44 N | 083 42 20 W |
| Ross County Courthouse | Building | 192 | Ross | 39 20 00 N | 082 58 57 W |
| Ross County Museum | Building | 192 | Ross | 39 19 50 N | 082 58 58 W |
| Rosse Hall | Building | 329 | Knox | 40 22 26 N | 082 23 51 W |
| Rossford Public Library | Building | 187 | Wood | 41 36 31 N | 083 33 42 W |
| Roudebush Hall | Building | 283 | Butler | 39 30 34 N | 084 44 05 W |
| Rowan Hall | Building | 274 | Butler | 39 30 27 N | 084 43 60 W |
| Ruff Memorial Learning Center | Building | 238 | Franklin | 39 57 21 N | 082 56 12 W |
| Rutherford B Hayes Presidential Center Library | Building | 193 | Sandusky | 41 20 29 N | 083 07 46 W |
| Ryors Hall | Building | 195 | Athens | 39 19 34 N | 082 06 21 W |
| Sabina Municipal Building | Building | 320 | Clinton | 39 29 23 N | 083 38 13 W |
| Sabina Public Library | Building | 320 | Clinton | 39 29 23 N | 083 38 13 W |
| Sachsenheim Hall | Building | 222 | Cuyahoga | 41 27 40 N | 081 44 07 W |
| Safety Building | Building | 181 | Lucas | 41 39 22 N | 083 32 08 W |
| Saint Albert Hall | Building | 242 | Franklin | 39 59 37 N | 082 56 24 W |
| Saint Aloysius Orphanage | Building | 187 | Hamilton | 39 10 17 N | 084 28 10 W |
| Saint Andrews Abbey | Building | 259 | Cuyahoga | 41 28 48 N | 081 36 40 W |
| Saint Anthony Hall | Building | 202 | Lucas | 41 42 32 N | 083 42 28 W |
| Saint Anthonys Home for Working Boys | Building | 204 | Cuyahoga | 41 28 51 N | 081 44 29 W |
| Saint Augustine Manor Home for the Aged | Building | 201 | Cuyahoga | 41 28 57 N | 081 44 19 W |
| Saint Barbara Hall | Building | 196 | Hamilton | 39 09 02 N | 084 28 39 W |
| Saint Bernard Public Library | Building | 168 | Hamilton | 39 10 04 N | 084 29 48 W |
| Saint Charles Parish Hall | Building | 266 | Cuyahoga | 41 24 08 N | 081 44 03 W |
| Saint Clair Springs Childrens Home | Building | 314 | Preble | 39 43 45 N | 084 38 50 W |
| Saint Clare Hall | Building | 200 | Lucas | 41 42 38 N | 083 42 23 W |
| Saint Elizabeths Hall | Building | 213 | Cuyahoga | 41 29 06 N | 081 37 22 W |
| Saint Francis Dormitory | Building | 201 | Lucas | 41 42 31 N | 083 42 31 W |
| Saint Francis Hall | Building | 304 | Jefferson | 40 22 37 N | 080 37 08 W |
| Saint Francis Home | Building | 238 | Seneca | 41 05 47 N | 083 10 02 W |
| Saint John Community Arena | Building | 368 | Jefferson | 40 22 11 N | 080 39 43 W |
| Saint John Social Service Center | Building | 165 | Hamilton | 39 06 34 N | 084 30 44 W |
| Saint Johns Home | Building | 211 | Lake | 41 43 09 N | 081 14 48 W |
| Saint Joseph Center | Building | 311 | Jefferson | 40 22 34 N | 080 37 28 W |
| Saint Joseph Hall | Building | 201 | Lucas | 41 42 42 N | 083 42 23 W |
| Saint Joseph Hall | Building | 244 | Montgomery | 39 44 20 N | 084 10 40 W |
| Saint Joseph Home for the Aged | Building | 207 | Cuyahoga | 41 29 18 N | 081 38 40 W |
| Saint Joseph Home for the Aged (historical) | Building | 207 | Cuyahoga | 41 29 18 N | 081 38 41 W |
| Saint Josephs On the Lake Retreat House | Building | 181 | Cuyahoga | 41 35 42 N | 081 33 07 W |
| Saint Josephs Orphanage | Building | 276 | Hamilton | 39 11 11 N | 084 35 11 W |
| Saint Josephs Orphans Home | Building | 241 | Montgomery | 39 44 59 N | 084 09 46 W |
| Saint Mark Center | Building | 329 | Cuyahoga | 41 29 50 N | 081 27 50 W |
| Saint Marys Hall | Building | 238 | Hancock | 41 02 20 N | 083 39 38 W |
| Saint Marys Hall | Building | 244 | Montgomery | 39 44 23 N | 084 10 39 W |
| Saint Marys Orphan Asylum for Females (historical) | Building | 198 | Cuyahoga | 41 30 11 N | 081 41 30 W |
| Saint Marys Parish House | Building | 183 | Lucas | 41 39 32 N | 083 32 05 W |
| Saint Michaels Hall | Building | 260 | Cuyahoga | 41 27 48 N | 081 36 54 W |
| Saint Michaels Hall | Building | 206 | Cuyahoga | 41 28 08 N | 081 41 48 W |
| Saint Paul Building | Building | 163 | Hamilton | 39 06 00 N | 084 30 41 W |
| Saint Sebastian Recreation Center | Building | 302 | Summit | 41 05 53 N | 081 34 11 W |
| Saint Theresa Home for the Aged | Building | 256 | Hamilton | 39 11 34 N | 084 24 37 W |
| Saint Thomas Moore Hall | Building | 310 | Jefferson | 40 22 41 N | 080 37 08 W |
| Saint Vincents Orphan Asylum (historical) | Building | 209 | Cuyahoga | 41 28 40 N | 081 42 32 W |
| Saint Vincents Orphanage | Building | 238 | Franklin | 39 57 30 N | 082 57 34 W |
| Saints Cosmos and Damian Science Hall | Building | 314 | Jefferson | 40 22 35 N | 080 37 19 W |
| Salem City Hall | Building | 373 | Columbiana | 40 53 58 N | 080 51 20 W |
| Salem Public Library | Building | 374 | Columbiana | 40 54 02 N | 080 50 58 W |
| Salem Township Public Library | Building | 216 | Warren | 39 21 22 N | 084 08 33 W |
| Sammis Power Plant | Building | 203 | Jefferson | 40 31 54 N | 080 37 56 W |
| Samuel L Meyer Hall of Science | Building | 292 | Hardin | 40 46 07 N | 083 49 46 W |
| Samuel Mather Hall | Building | 326 | Knox | 40 22 23 N | 082 23 52 W |
| Sanborn Hall | Building | 275 | Delaware | 40 18 01 N | 083 04 36 W |
| Sander Dining Hall | Building | 245 | Hamilton | 39 07 52 N | 084 30 43 W |
| Sander Hall (historical) | Building | 244 | Hamilton | 39 07 52 N | 084 30 42 W |
| Sandusky County Childrens Center | Building | 189 | Sandusky | 41 21 21 N | 083 04 53 W |
| Sandusky County Courthouse | Building | 192 | Sandusky | 41 20 48 N | 083 07 03 W |
| Sandusky County Jail | Building | 192 | Sandusky | 41 20 48 N | 083 07 06 W |
| Sandusky County Law Library | Building | 192 | Sandusky | 41 20 48 N | 083 07 03 W |
| Sandusky Library | Building | 183 | Erie | 41 27 11 N | 082 42 40 W |
| Sandusky Water Filtration Plant | Building | 177 | Erie | 41 27 02 N | 082 40 10 W |
| Sansbury Hall | Building | 244 | Franklin | 39 59 38 N | 082 56 27 W |
| Sargent Hall | Building | 195 | Athens | 39 19 30 N | 082 06 18 W |
| Satterfield Hall | Building | 351 | Portage | 41 08 53 N | 081 20 51 W |
| Saum Hall | Building | 261 | Franklin | 40 07 35 N | 082 56 10 W |
| Saunder Museum | Building | 221 | Fulton | 41 32 33 N | 084 17 40 W |
| Savage Hall | Building | 187 | Lucas | 41 39 36 N | 083 36 35 W |
| Sawyer Gymnasium | Building | 262 | Butler | 39 30 04 N | 084 43 29 W |
| Sawyer Hall | Building | 235 | Hamilton | 39 08 01 N | 084 30 44 W |
| Sawyer Hall | Building | 323 | Licking | 40 04 18 N | 082 31 06 W |
| Saxton McKinley House | Building | 323 | Stark | 40 47 54 N | 081 22 31 W |
| Saylor Hall | Building | 242 | Cuyahoga | 41 22 05 N | 081 51 01 W |
| Saylor Hall | Building | 238 | Franklin | 39 57 19 N | 082 56 13 W |
| Scarlet Oaks | Building | 213 | Hamilton | 39 09 26 N | 084 31 37 W |
| Schaaf Hall | Building | 238 | Franklin | 39 57 15 N | 082 56 19 W |
| Schauffler Hall | Building | 218 | Defiance | 41 17 48 N | 084 21 37 W |
| Scheide Music Center | Building | 326 | Wayne | 40 48 34 N | 081 56 03 W |
| Schiappa Memorial Library | Building | 351 | Jefferson | 40 22 11 N | 080 40 25 W |
| Schmidt Building | Building | 167 | Hamilton | 39 06 04 N | 084 30 36 W |
| Schmidt Community Center | Building | 320 | Wayne | 40 50 48 N | 081 46 21 W |
| Schmidt Hall | Building | 198 | Hamilton | 39 08 53 N | 084 28 35 W |
| Schmidt Memorial Fieldhouse | Building | 196 | Hamilton | 39 08 59 N | 084 28 42 W |
| Schoedinger Hall | Building | 238 | Franklin | 39 57 18 N | 082 56 12 W |
| Schott Building | Building | 204 | Hamilton | 39 08 51 N | 084 28 33 W |
| Schrank Hall | Building | 313 | Summit | 41 04 29 N | 081 30 51 W |
| Scioto County Courthouse | Building | 161 | Scioto | 38 44 07 N | 083 00 01 W |
| Scioto County Home | Building | 165 | Scioto | 38 43 23 N | 083 02 52 W |
| Scioto Hall | Building | 235 | Hamilton | 39 08 04 N | 084 30 43 W |
| Scott Hall | Building | 268 | Butler | 39 30 16 N | 084 44 02 W |
| Scott Hall | Building | 239 | Franklin | 40 00 12 N | 083 02 20 W |