Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| 1328 Riverside Company Heliport | Airport | 226 | Franklin | 39 58 48 N | 083 03 41 W |
| 1st District Police Station Heliport | Airport | 230 | Cuyahoga | 41 26 53 N | 081 46 44 W |
| 210 Reservoir | Reservoir | 207 | Athens | 39 22 07 N | 082 05 30 W |
| 228th Shopping Center | Locale | 184 | Cuyahoga | 41 36 42 N | 081 31 19 W |
| 4th District Police Station Heliport | Airport | 241 | Cuyahoga | 41 28 19 N | 081 37 10 W |
| 7th Ward School | School | 180 | Erie | 41 26 31 N | 082 42 56 W |
| 9 Newsport Heliport | Airport | 160 | Hamilton | 39 05 00 N | 084 30 45 W |
| A B Bonds Junior Administration Building | Building | 243 | Cuyahoga | 41 22 06 N | 081 50 41 W |
| A B Hart Junior High School | School | 223 | Cuyahoga | 41 27 07 N | 081 38 10 W |
| A B Williams Memorial Woods | Woods | 268 | Cuyahoga | 41 33 40 N | 081 25 39 W |
| A J Jordak Elementary School | School | 346 | Geauga | 41 27 44 N | 081 04 15 W |
| A R Duvall Cemetery | Cemetery | 220 | Pickaway | 39 44 41 N | 082 55 25 W |
| A W Marion Memorial | Park | 242 | Pickaway | 39 37 44 N | 082 53 16 W |
| A W Marion State Park | Park | 265 | Pickaway | 39 37 50 N | 082 52 47 W |
| A W Smith Building | Building | 216 | Cuyahoga | 41 30 10 N | 081 36 24 W |
| Aaron Cemetery | Cemetery | 341 | Monroe | 39 50 30 N | 081 17 36 W |
| Aaron Creek | Stream | | Lawrence | 38 39 26 N | 082 29 01 W |
| Aaronsburg (historical) | Populated Place | 408 | Morrow | 40 23 54 N | 082 41 43 W |
| Abanaka | Populated Place | 254 | Van Wert | 40 45 36 N | 084 41 54 W |
| Abanaka Post Office (historical) | Post Office | | Van Wert | 40 45 35 N | 084 41 55 W |
| Abbe Meteorological Observatory | Locale | 230 | Hamilton | 39 09 21 N | 084 30 54 W |
| Abbey Etna Heliport | Airport | 192 | Wood | 41 33 53 N | 083 36 36 W |
| Abbeyville | Populated Place | 270 | Medina | 41 11 50 N | 081 53 12 W |
| Abbeyville Cemetery | Cemetery | 274 | Medina | 41 11 44 N | 081 53 23 W |
| Abbeyville Post Office (historical) | Post Office | 268 | Medina | 41 11 50 N | 081 53 14 W |
| Abbot Cemetery | Cemetery | 336 | Portage | 41 19 15 N | 081 05 43 W |
| Abbot School (historical) | School | 233 | Fulton | 41 41 51 N | 084 11 23 W |
| Abbots Bridge | Bridge | 197 | Seneca | 41 12 35 N | 083 08 44 W |
| Abbott Cemetery | Cemetery | 341 | Pike | 39 03 31 N | 083 11 26 W |
| Abbotts Island | Island | 204 | Seneca | 41 11 13 N | 083 09 07 W |
| Abbottsville | Populated Place | 326 | Darke | 40 02 15 N | 084 34 42 W |
| Abbottsville Post Office (historical) | Post Office | 324 | Darke | 40 02 15 N | 084 34 40 W |
| Abbottsville United Methodist Church | Church | 326 | Darke | 40 02 17 N | 084 34 44 W |
| Abbyssina Baptist Church | Church | 176 | Hamilton | 39 09 00 N | 084 30 41 W |
| Abe | Populated Place | 296 | Miami | 40 09 57 N | 084 22 28 W |
| Abe A Yoder Farm Cemetery | Cemetery | 371 | Holmes | 40 31 34 N | 081 46 57 W |
| Abe Post Office (historical) | Post Office | 297 | Miami | 40 09 55 N | 084 22 25 W |
| Abe Run | Stream | | Scioto | 38 54 51 N | 083 13 25 W |
| Abel Cemetery | Cemetery | 397 | Carroll | 40 27 28 N | 081 00 40 W |
| Aberdeen | Populated Place | 157 | Brown | 38 39 20 N | 083 45 40 W |
| Aberdeen Community Park | Park | 152 | Brown | 38 39 33 N | 083 45 50 W |
| Aberdeen Elementary School | School | 154 | Brown | 38 39 14 N | 083 45 32 W |
| Aberdeen Post Office | Post Office | 157 | Brown | 38 39 20 N | 083 45 40 W |
| Abledell (subdivision) | Populated Place | 257 | Guernsey | 40 01 04 N | 081 37 26 W |
| Abner Hollow Cincinnati Museum of Natural History Nature Preserve | Park | 216 | Adams | 38 43 26 N | 083 25 56 W |
| Abram Creek | Stream | | Cuyahoga | 41 25 04 N | 081 51 59 W |
| Abundant Life Center of Eternal Truth | Church | 297 | Summit | 41 04 22 N | 081 32 32 W |
| Abundant Life Church of the Living God | Church | 181 | Hamilton | 39 06 38 N | 084 30 16 W |
| Abyssinia Baptist Church | Church | 196 | Cuyahoga | 41 31 22 N | 081 36 33 W |
| Acacia Country Club | Locale | 318 | Cuyahoga | 41 30 04 N | 081 29 25 W |
| Acacia Park Cemetery | Cemetery | 338 | Cuyahoga | 41 30 34 N | 081 26 38 W |
| Acacia School (historical) | School | 170 | Adams | 38 39 12 N | 083 41 03 W |
| Academia | Populated Place | 321 | Knox | 40 24 49 N | 082 28 06 W |
| Academia Post office (historical) | Post Office | 324 | Knox | 40 24 50 N | 082 28 05 W |
| Academy of Creative Expressions | School | | Cuyahoga | 41 31 08 N | 081 37 57 W |
| Academy of Human Resources | School | | Cuyahoga | 41 31 08 N | 081 37 57 W |
| Academy of Medicine | School | 210 | Cuyahoga | 41 30 01 N | 081 36 31 W |
| Academy of Music (historical) | School | 198 | Cuyahoga | 41 29 59 N | 081 41 52 W |
| Academy Park | Park | 226 | Franklin | 39 57 40 N | 082 56 46 W |
| Academy School | School | 230 | Warren | 39 26 20 N | 084 12 16 W |
| Ace Morgan Theatre | Building | 297 | Licking | 40 04 08 N | 082 31 21 W |
| Achor | Populated Place | 255 | Columbiana | 40 46 27 N | 080 32 30 W |
| Achor Cemetery | Cemetery | 338 | Clinton | 39 18 23 N | 083 43 57 W |
| Achor Valley Cemetery | Cemetery | 276 | Columbiana | 40 46 26 N | 080 32 13 W |
| Ackermann Hall | Building | 238 | Franklin | 39 57 19 N | 082 56 16 W |
| Ackerson Run | Stream | | Monroe | 39 46 23 N | 080 56 34 W |
| Ackley Cemetery | Cemetery | 316 | Ashland | 40 48 04 N | 082 14 25 W |
| Ackley School (historical) | School | 292 | Noble | 39 46 05 N | 081 31 13 W |
| Ackmer School (historical) | School | 255 | Fulton | 41 40 49 N | 084 22 11 W |
| Acland House | Building | 322 | Knox | 40 22 32 N | 082 23 44 W |
| Acme | Populated Place | 366 | Medina | 41 01 29 N | 081 47 46 W |
| Acme Hill | Summit | 369 | Medina | 41 01 35 N | 081 47 56 W |
| Acme Post Office (historical) | Post Office | 366 | Medina | 41 01 30 N | 081 47 44 W |
| Acorn Trail | Trail | 234 | Vinton | 39 08 38 N | 082 30 37 W |
| Acton Lake | Reservoir | 261 | Butler | 39 33 24 N | 084 44 06 W |
| Acton Lake Dam | Dam | 261 | Butler | 39 33 24 N | 084 44 06 W |
| Acton Lake Picnic Area | Locale | 280 | Butler | 39 33 25 N | 084 44 28 W |
| Ada | Populated Place | 292 | Hardin | 40 46 10 N | 083 49 22 W |
| Ada Airport | Airport | 288 | Hardin | 40 47 26 N | 083 49 45 W |
| Ada Elementary School | School | 293 | Hardin | 40 46 26 N | 083 49 51 W |
| Ada High School | School | 293 | Hardin | 40 46 28 N | 083 49 51 W |
| Ada Post Office | Post Office | 292 | Hardin | 40 46 10 N | 083 49 25 W |
| Ada Town Hall | Building | 292 | Hardin | 40 46 16 N | 083 49 25 W |
| Adair | Populated Place | 366 | Columbiana | 40 47 37 N | 080 57 21 W |
| Adair Post Office (historical) | Post Office | 366 | Columbiana | 40 47 35 N | 080 57 19 W |
| Adam H Miller Farm Cemetery | Cemetery | 369 | Holmes | 40 31 17 N | 081 50 00 W |
| Adam School | School | 236 | Hancock | 41 02 32 N | 083 39 45 W |
| Adams Cemetery | Cemetery | 262 | Hancock | 40 52 22 N | 083 31 05 W |
| Adams Cemetery | Cemetery | 313 | Muskingum | 40 08 08 N | 081 52 54 W |
| Adams Cemetery | Cemetery | 213 | Scioto | 38 46 23 N | 083 03 22 W |
| Adams Cemetery | Cemetery | 220 | Scioto | 38 56 33 N | 082 52 42 W |
| Adams County | Civil | 262 | Adams | 38 51 00 N | 083 28 00 W |
| Adams County Hospital | Hospital | 300 | Adams | 38 47 39 N | 083 32 08 W |
| Adams County Hospital Heliport | Airport | 305 | Adams | 38 47 40 N | 083 32 05 W |
| Adams Elementary School | School | 199 | Butler | 39 24 08 N | 084 34 29 W |
| Adams Elementary School | School | 300 | Mahoning | 41 04 30 N | 080 37 44 W |
| Adams High School (historical) | School | 271 | Cuyahoga | 41 27 16 N | 081 36 08 W |
| Adams Hollow | Valley | | Monroe | 39 37 52 N | 081 09 46 W |
| Adams Junior High School | School | 183 | Erie | 41 27 16 N | 082 42 37 W |
| Adams Lake | Reservoir | 232 | Adams | 38 48 48 N | 083 30 60 W |
| Adams Lake Dam | Dam | 232 | Adams | 38 48 48 N | 083 30 60 W |
| Adams Lake State Reserve | Park | 236 | Adams | 38 48 51 N | 083 31 36 W |
| Adams Landing Strip | Airport | 287 | Miami | 40 04 52 N | 084 20 17 W |
| Adams Lutheran Cemetery | Cemetery | 251 | Seneca | 41 10 57 N | 082 58 33 W |
| Adams Marina | Locale | 142 | Hamilton | 39 06 08 N | 084 26 06 W |
| Adams Mills | Populated Place | 223 | Muskingum | 40 09 24 N | 081 56 48 W |
| Adams Mills Cemetery | Cemetery | 237 | Coshocton | 40 09 32 N | 081 56 46 W |
| Adams Mills Post Office | Post Office | 224 | Muskingum | 40 09 25 N | 081 56 49 W |
| Adams Park | Park | 311 | Summit | 41 20 32 N | 081 28 51 W |
| Adams Ridge | Populated Place | 224 | Defiance | 41 23 55 N | 084 15 56 W |