Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Ashville Post Office | Post Office | 217 | Pickaway | 39 42 55 N | 082 57 10 W |
| Ashville Primary School | School | 219 | Pickaway | 39 42 56 N | 082 56 53 W |
| Ashwood (historical) | Populated Place | 218 | Defiance | 41 15 21 N | 084 27 26 W |
| Ashwood Post Office (historical) | Post Office | 218 | Defiance | 41 15 20 N | 084 27 25 W |
| Askue Run | Stream | | Ashtabula | 41 43 27 N | 080 43 03 W |
| Aspinwall Church of God | Church | 187 | Cuyahoga | 41 33 28 N | 081 34 45 W |
| Assembly of Christians Church | Church | 193 | Lucas | 41 43 21 N | 083 38 12 W |
| Assembly of God Church | Church | 305 | Crawford | 40 48 18 N | 082 58 17 W |
| Assembly of God Church | Church | 229 | Defiance | 41 17 20 N | 084 45 52 W |
| Assembly of Jesus Christ Church | Church | 183 | Erie | 41 25 18 N | 082 41 13 W |
| Assembly of Truth Church | Church | 315 | Mahoning | 41 04 16 N | 080 35 20 W |
| Assembly of Yahveh | Church | 184 | Hamilton | 39 14 23 N | 084 27 28 W |
| Assisi Hall | Building | 201 | Lucas | 41 42 33 N | 083 42 33 W |
| Associated Enterprises Heliport | Airport | 201 | Lake | 41 42 24 N | 081 16 29 W |
| Associated Reformed Churchyard | Cemetery | 293 | Brown | 38 51 57 N | 083 46 56 W |
| Assumption | Populated Place | 222 | Fulton | 41 40 19 N | 083 54 42 W |
| Assumption Catholic Church | Church | 381 | Belmont | 39 59 18 N | 081 10 50 W |
| Assumption Catholic Church | Church | 239 | Cuyahoga | 41 25 08 N | 081 47 54 W |
| Assumption Catholic Church | Church | 258 | Montgomery | 39 47 02 N | 084 14 48 W |
| Assumption Catholic Church | Church | 267 | Seneca | 41 09 11 N | 082 52 49 W |
| Assumption Cemetery | Cemetery | 267 | Seneca | 41 09 11 N | 082 52 47 W |
| Assumption Church | Church | 206 | Ashtabula | 41 48 05 N | 080 57 27 W |
| Assumption of the Blessed Virgin Mary Greek Orthodox Cathedral | Church | 312 | Clark | 39 55 14 N | 083 47 33 W |
| Assumption Roman Catholic Church | Church | 257 | Hamilton | 39 14 02 N | 084 32 37 W |
| Assumption School | School | 205 | Ashtabula | 41 48 02 N | 080 57 26 W |
| Assumption School | School | 238 | Cuyahoga | 41 25 08 N | 081 47 58 W |
| Assumption School | School | 256 | Hamilton | 39 14 00 N | 084 32 36 W |
| Assumption School | School | 259 | Montgomery | 39 47 03 N | 084 14 46 W |
| Assumption School | School | 266 | Seneca | 41 09 08 N | 082 52 49 W |
| Astorhurst Golf Course | Locale | 231 | Cuyahoga | 41 22 08 N | 081 34 54 W |
| Astoria | Populated Place | 244 | Butler | 39 33 33 N | 084 27 60 W |
| Astoria Cemetery | Cemetery | 256 | Butler | 39 33 40 N | 084 27 51 W |
| Astoria Post Office (historical) | Post Office | 247 | Butler | 39 33 35 N | 084 27 60 W |
| Ater Cemetery | Cemetery | 227 | Ross | 39 30 20 N | 083 07 24 W |
| Athalia | Populated Place | 168 | Lawrence | 38 30 58 N | 082 18 24 W |
| Athalia Rural Branch Post Office (historical) | Post Office | 168 | Lawrence | 38 31 00 N | 082 18 25 W |
| Athens | Populated Place | 219 | Athens | 39 19 45 N | 082 06 05 W |
| Athens Cemetery | Cemetery | 201 | Athens | 39 19 51 N | 082 06 44 W |
| Athens City Hall | Building | 217 | Athens | 39 19 46 N | 082 06 03 W |
| Athens Country Club | Locale | 250 | Athens | 39 18 43 N | 082 09 41 W |
| Athens County | Civil | 235 | Athens | 39 21 00 N | 082 03 00 W |
| Athens County Childrens Home | Locale | 195 | Athens | 39 20 17 N | 082 05 03 W |
| Athens County Courthouse | Building | 220 | Athens | 39 19 44 N | 082 06 06 W |
| Athens County Fairgrounds | Locale | 197 | Athens | 39 19 52 N | 082 06 60 W |
| Athens County Law Library | Building | 220 | Athens | 39 19 44 N | 082 06 06 W |
| Athens Downtown Historic District | Park | 217 | Athens | 39 19 47 N | 082 06 04 W |
| Athens Fire Baptized Holiness Church | Church | 195 | Cuyahoga | 41 31 22 N | 081 36 53 W |
| Athens Fish and Game Club Lake | Reservoir | 236 | Athens | 39 18 00 N | 082 16 48 W |
| Athens Fish and Game Club Lake Dam | Dam | 236 | Athens | 39 18 00 N | 082 16 48 W |
| Athens High School | School | 238 | Athens | 39 22 21 N | 082 07 41 W |
| Athens Mall Shopping Center | Locale | 186 | Athens | 39 20 09 N | 082 04 18 W |
| Athens Mental Health Center | Hospital | 215 | Athens | 39 19 12 N | 082 06 34 W |
| Athens Middle School | School | 231 | Athens | 39 19 50 N | 082 06 14 W |
| Athens Missionary Baptist Church | Church | 188 | Wood | 41 35 28 N | 083 29 35 W |
| Athens Post Office | Post Office | 195 | Athens | 39 19 56 N | 082 05 40 W |
| Atherton | Populated Place | 288 | Licking | 39 57 38 N | 082 26 10 W |
| Athlone (historical) | Populated Place | 185 | Butler | 39 21 28 N | 084 31 10 W |
| Atkinson Cemetery | Cemetery | 225 | Washington | 39 37 30 N | 081 26 53 W |
| Atkinson Creek | Stream | | Tuscarawas | 40 13 44 N | 081 16 57 W |
| Atkinson Elementary School | School | 191 | Sandusky | 41 20 12 N | 083 06 02 W |
| Atkinson Hall | Building | 186 | Athens | 39 19 24 N | 082 05 34 W |
| Atkinson Lookout Tower | Tower | 323 | Vinton | 39 17 23 N | 082 22 13 W |
| Atkinson Ridge | Ridge | 305 | Vinton | 39 17 39 N | 082 21 58 W |
| Atkinson Square Office Park | Locale | 187 | Hamilton | 39 17 27 N | 084 26 46 W |
| Atlanta | Populated Place | 256 | Pickaway | 39 33 41 N | 083 11 26 W |
| Atlanta Post Office | Post Office | 256 | Pickaway | 39 33 40 N | 083 11 25 W |
| Atomic Energy Commission Dam | Dam | 203 | Pike | 39 01 42 N | 082 59 12 W |
| Atomic Energy Commission Lake | Reservoir | 203 | Pike | 39 01 42 N | 082 59 12 W |
| Atomic Energy Commission Mound Laboratory | Building | 266 | Montgomery | 39 37 51 N | 084 17 19 W |
| Atomic Energy Commission Pond | Reservoir | 209 | Pike | 39 01 12 N | 082 59 12 W |
| Atomic Energy Commission Pond Dam | Dam | 209 | Pike | 39 01 12 N | 082 59 12 W |
| Atomic Speedway | Locale | 240 | Ross | 39 12 12 N | 083 01 15 W |
| Atonement Church | Church | 228 | Hamilton | 39 16 46 N | 084 29 09 W |
| Atonement Lutheran Church | Church | 270 | Franklin | 40 03 30 N | 083 03 44 W |
| Atrium Center Shopping Center | Locale | 265 | Franklin | 40 05 55 N | 082 56 57 W |
| Attica | Populated Place | 289 | Seneca | 41 03 53 N | 082 53 16 W |
| Attica Cemetery | Cemetery | 292 | Seneca | 41 04 04 N | 082 52 49 W |
| Attica Elementary School | School | 293 | Seneca | 41 03 53 N | 082 52 59 W |
| Attica Junction | Populated Place | 289 | Seneca | 41 05 13 N | 082 52 38 W |
| Attica Post Office | Post Office | 289 | Seneca | 41 03 55 N | 082 53 15 W |
| Attica Upground Reservoir | Reservoir | 280 | Seneca | 41 03 12 N | 082 53 24 W |
| Attica Upground Reservoir Dam | Dam | 280 | Seneca | 41 03 12 N | 082 53 24 W |
| Attucks School | School | 201 | Cuyahoga | 41 30 27 N | 081 38 19 W |
| Atwater | Populated Place | 344 | Portage | 41 01 26 N | 081 09 48 W |
| Atwater Cemetery | Cemetery | 355 | Portage | 41 01 17 N | 081 08 58 W |
| Atwater Center | Populated Place | 352 | Portage | 41 01 25 N | 081 08 52 W |
| Atwater Congregational Church | Church | 355 | Portage | 41 01 20 N | 081 08 54 W |
| Atwater Ditch | Canal | 347 | Portage | 41 02 37 N | 081 08 51 W |
| Atwater Elementary School | School | 219 | Pickaway | 39 36 52 N | 082 56 13 W |
| Atwater Post Office | Post Office | 343 | Portage | 41 01 25 N | 081 09 49 W |
| Atwood (historical) | Populated Place | 282 | Carroll | 40 33 09 N | 081 14 32 W |
| Atwood Cove | Populated Place | 286 | Carroll | 40 32 48 N | 081 14 38 W |
| Atwood Crossing | Populated Place | 287 | Carroll | 40 32 55 N | 081 14 13 W |
| Atwood Dam | Dam | 285 | Tuscarawas | 40 31 36 N | 081 17 05 W |
| Atwood Lake | Reservoir | 285 | Tuscarawas | 40 31 36 N | 081 17 05 W |
| Atwood Lake Park | Park | 287 | Tuscarawas | 40 32 32 N | 081 15 57 W |
| Atwood Lodge | Locale | 327 | Carroll | 40 32 37 N | 081 14 35 W |
| Atwood Lodge Airport | Airport | 319 | Carroll | 40 31 56 N | 081 14 17 W |
| Atwood Lodge Heliport | Airport | 330 | Carroll | 40 32 33 N | 081 14 20 W |
| Atwood Marina West | Locale | 286 | Tuscarawas | 40 32 08 N | 081 16 30 W |
| Atwood Pines | Populated Place | 287 | Carroll | 40 33 11 N | 081 13 48 W |
| Atwood Post Office (historical) | Post Office | 282 | Carroll | 40 33 10 N | 081 14 34 W |
| Atwood Valley | Populated Place | 293 | Carroll | 40 33 18 N | 081 12 58 W |
| Atwood Village | Populated Place | 293 | Carroll | 40 32 09 N | 081 14 54 W |
| Atwood Yacht Club | Locale | 287 | Carroll | 40 32 56 N | 081 14 22 W |
| Au Glaize Golf Course | Locale | 214 | Paulding | 41 12 22 N | 084 26 58 W |
| Au Heliport | Airport | 393 | Richland | 40 46 23 N | 082 33 46 W |
| Auburn | Populated Place | 242 | Butler | 39 23 28 N | 084 42 08 W |
| Auburn Airport | Airport | 363 | Geauga | 41 24 37 N | 081 17 03 W |
| Auburn Avenue Baptist Church | Church | 380 | Logan | 40 21 38 N | 083 45 27 W |