Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Alexander Salamon Airport | Airport | 267 | Adams | 38 51 05 N | 083 33 58 W |
| Alexander Union Cemetery | Cemetery | 228 | Athens | 39 15 37 N | 082 09 51 W |
| Alexanders Landing | Locale | 172 | Meigs | 38 52 51 N | 081 54 41 W |
| Alexandria | Populated Place | 296 | Licking | 40 05 20 N | 082 36 45 W |
| Alexandria | Populated Place | 156 | Scioto | 38 43 28 N | 083 02 53 W |
| Alexandria Baptist Church | Church | 300 | Licking | 40 05 26 N | 082 36 49 W |
| Alexandria Post Office | Post Office | 298 | Licking | 40 05 22 N | 082 36 46 W |
| Alexandria Post Office (historical) | Post Office | 159 | Scioto | 38 43 30 N | 083 02 55 W |
| Alexandria United Methodist Church | Church | 299 | Licking | 40 05 25 N | 082 36 51 W |
| Alexis | Populated Place | 224 | Monroe | 39 38 11 N | 081 01 52 W |
| Alexis Addition | Populated Place | 179 | Lucas | 41 43 11 N | 083 31 37 W |
| Alexis Congregational Church | Church | 180 | Lucas | 41 43 50 N | 083 31 53 W |
| Alexis Post Office (historical) | Post Office | 238 | Monroe | 39 38 10 N | 081 01 54 W |
| Alexis-Lewis Shopping Center | Locale | 184 | Lucas | 41 43 15 N | 083 34 05 W |
| Alexis-Tremainsville Shopping Center | Locale | 193 | Lucas | 41 43 14 N | 083 37 14 W |
| Aley Cemetery | Cemetery | 290 | Greene | 39 45 25 N | 084 05 14 W |
| Aley Church | Church | 290 | Greene | 39 45 26 N | 084 05 14 W |
| Alfred | Populated Place | 213 | Meigs | 39 10 21 N | 081 55 15 W |
| Alfred A Benesch Elementary School | School | 206 | Cuyahoga | 41 29 37 N | 081 39 07 W |
| Alfred Holbrook Elementary School | School | 262 | Warren | 39 26 35 N | 084 11 17 W |
| Alfred Post Office (historical) | Post Office | 212 | Meigs | 39 10 20 N | 081 55 14 W |
| Alfred United Methodist Church | Church | 218 | Meigs | 39 10 19 N | 081 55 24 W |
| Alge Airport | Airport | 261 | Hancock | 40 54 17 N | 083 38 41 W |
| Alger | Populated Place | 298 | Hardin | 40 42 22 N | 083 50 38 W |
| Alger Cemetery | Cemetery | 234 | Cuyahoga | 41 26 56 N | 081 48 51 W |
| Alger Elementary School | School | 303 | Hardin | 40 42 40 N | 083 50 41 W |
| Alger Post Office | Post Office | 298 | Hardin | 40 42 20 N | 083 50 40 W |
| Alger School | School | 299 | Montgomery | 39 51 11 N | 084 07 08 W |
| Algonquin Mill (historical) | Locale | 299 | Carroll | 40 30 47 N | 081 06 44 W |
| Alibi School (historical) | School | 322 | Miami | 40 10 30 N | 084 07 11 W |
| Alice | Populated Place | 219 | Gallia | 39 01 16 N | 082 22 22 W |
| Alice Post Office (historical) | Post Office | 219 | Gallia | 39 01 15 N | 082 22 20 W |
| Alikanna | Populated Place | 215 | Jefferson | 40 23 15 N | 080 38 09 W |
| Alikanna Post Office (historical) | Post Office | 215 | Jefferson | 40 23 15 N | 080 38 09 W |
| Alkire Cemetery | Cemetery | 228 | Pickaway | 39 33 54 N | 083 07 22 W |
| Alkire Cemetery | Cemetery | 266 | Pickaway | 39 43 39 N | 083 14 38 W |
| Alkire Ditch | Canal | 279 | Madison | 39 46 31 N | 083 15 07 W |
| All Nations Gospel Holy Church of God | Church | 237 | Montgomery | 39 45 39 N | 084 14 53 W |
| All Saints Catholic Church | Church | 314 | Stark | 40 47 08 N | 081 23 17 W |
| All Saints Catholic Church | Church | 187 | Wood | 41 36 30 N | 083 33 36 W |
| All Saints Cemetery | Cemetery | 294 | Summit | 41 17 22 N | 081 32 10 W |
| All Saints Church | Church | 225 | Montgomery | 39 45 22 N | 084 12 42 W |
| All Saints Episcopal Church | Church | 241 | Hamilton | 39 11 08 N | 084 25 27 W |
| All Saints Episcopal Church | Church | 188 | Lucas | 41 39 02 N | 083 33 26 W |
| All Saints Episcopal Church | Church | 162 | Scioto | 38 43 58 N | 083 00 02 W |
| All Saints Lutheran Church | Church | 265 | Clermont | 39 06 46 N | 084 18 21 W |
| All Saints Lutheran Church | Church | 191 | Lucas | 41 35 39 N | 083 40 17 W |
| All Saints Polish National Catholic Church | Church | 213 | Cuyahoga | 41 27 23 N | 081 38 55 W |
| All Saints Roman Catholic Church | Church | 241 | Hamilton | 39 13 05 N | 084 21 32 W |
| All Saints School | School | 226 | Jefferson | 40 21 25 N | 080 37 17 W |
| All Souls Cemetery | Cemetery | 378 | Geauga | 41 35 38 N | 081 16 09 W |
| All Souls Unitarian Universalist Church | Church | 348 | Richland | 40 37 12 N | 082 30 49 W |
| All Souls Universalist Church (historical) | Church | 204 | Cuyahoga | 41 31 23 N | 081 35 44 W |
| Allandale (historical) | Populated Place | 205 | Hamilton | 39 12 04 N | 084 20 23 W |
| Allardale County Park | Park | 322 | Medina | 41 11 36 N | 081 41 26 W |
| Alledonia | Populated Place | 253 | Belmont | 39 53 55 N | 080 58 09 W |
| Alledonia Post Office | Post Office | 253 | Belmont | 39 53 55 N | 080 58 09 W |
| Allen Airport | Airport | 299 | Ashtabula | 41 40 05 N | 080 41 08 W |
| Allen Airport | Airport | 338 | Trumbull | 41 22 24 N | 080 40 08 W |
| Allen Art Building | Building | 249 | Lorain | 41 17 37 N | 082 12 60 W |
| Allen Cemetery | Cemetery | 246 | Guernsey | 40 05 28 N | 081 28 23 W |
| Allen Cemetery | Cemetery | 217 | Lawrence | 38 30 24 N | 082 33 58 W |
| Allen Cemetery | Cemetery | 190 | Lawrence | 38 31 46 N | 082 34 33 W |
| Allen Cemetery | Cemetery | 185 | Ottawa | 41 34 49 N | 083 23 49 W |
| Allen Center | Populated Place | 323 | Union | 40 14 30 N | 083 28 41 W |
| Allen Centre Post Office (historical) | Post Office | | Union | 40 14 30 N | 083 28 40 W |
| Allen Chapel | Church | 313 | Pike | 39 07 28 N | 082 48 33 W |
| Allen Chapel (historical) | Church | 246 | Guernsey | 40 05 27 N | 081 28 24 W |
| Allen Chapel African Methodist Episcopal Church | Church | 268 | Fairfield | 39 42 41 N | 082 35 54 W |
| Allen Chapel African Methodist Episcopal Church | Church | 302 | Union | 40 14 16 N | 083 22 13 W |
| Allen Chapel Cemetery | Cemetery | 313 | Pike | 39 07 26 N | 082 48 32 W |
| Allen Chapel Church | Church | 188 | Wood | 41 36 52 N | 083 33 33 W |
| Allen Classical Academy | School | 232 | Montgomery | 39 46 36 N | 084 10 03 W |
| Allen Corners | Locale | 287 | Trumbull | 41 24 55 N | 080 33 32 W |
| Allen County | Civil | 268 | Allen | 40 46 00 N | 084 05 00 W |
| Allen County Courthouse | Building | 270 | Allen | 40 44 35 N | 084 06 20 W |
| Allen County Fairgrounds | Locale | 280 | Allen | 40 43 35 N | 084 03 13 W |
| Allen County Farm Park | Park | 272 | Allen | 40 45 47 N | 084 02 57 W |
| Allen County Home | Building | 267 | Allen | 40 47 20 N | 084 02 36 W |
| Allen East Elementary School | School | 302 | Allen | 40 42 22 N | 083 55 32 W |
| Allen East High School | School | 286 | Allen | 40 45 34 N | 083 57 08 W |
| Allen East Primary School | School | 287 | Allen | 40 45 36 N | 083 57 08 W |
| Allen Elementary School | School | 184 | Ottawa | 41 35 13 N | 083 21 29 W |
| Allen Elementary School | School | 213 | Ross | 39 19 46 N | 083 00 49 W |
| Allen Elementary School | School | 317 | Stark | 40 47 14 N | 081 21 54 W |
| Allen Hall | Building | 202 | Gallia | 38 52 54 N | 082 22 47 W |
| Allen Hollow | Valley | | Hocking | 39 22 07 N | 082 42 17 W |
| Allen Hollow | Valley | | Monroe | 39 38 16 N | 081 11 42 W |
| Allen Hollow | Valley | | Pike | 39 10 32 N | 083 13 57 W |
| Allen House School | School | 253 | Hamilton | 39 07 28 N | 084 35 08 W |
| Allen Junction | Locale | 209 | Lucas | 41 42 58 N | 083 46 55 W |
| Allen Knob | Summit | 344 | Fairfield | 39 41 33 N | 082 39 20 W |
| Allen Memorial Medical Library | Building | 208 | Cuyahoga | 41 30 21 N | 081 36 30 W |
| Allen Park | Park | 214 | Montgomery | 39 40 15 N | 084 15 40 W |
| Allen Road Industrial Park | Locale | 187 | Butler | 39 18 37 N | 084 24 52 W |
| Allen Road Industrial Park | Locale | 320 | Summit | 41 11 27 N | 081 28 27 W |
| Allen Run | Stream | | Crawford | 40 47 42 N | 082 47 08 W |
| Allen Run | Stream | | Morgan | 39 39 14 N | 081 39 41 W |
| Allen Run | Stream | | Washington | 39 21 50 N | 081 18 49 W |
| Allen School | School | 218 | Lorain | 41 22 52 N | 082 04 42 W |
| Allen School (historical) | School | 289 | Marion | 40 32 48 N | 083 23 22 W |
| Allen School (historical) | School | 219 | Paulding | 41 05 31 N | 084 33 15 W |
| Allen School (historical) | School | 259 | Pickaway | 39 44 30 N | 083 09 58 W |
| Allen School (historical) | School | 317 | Shelby | 40 19 53 N | 084 07 06 W |
| Allen Temple (historical) | Church | 165 | Hamilton | 39 06 12 N | 084 30 23 W |
| Allen Temple African Methodist Episcopal Church | Church | 207 | Cuyahoga | 41 29 37 N | 081 38 04 W |
| Allen Temple African Methodist Episcopal Church | Church | 177 | Hamilton | 39 11 33 N | 084 27 42 W |
| Allen Township Hall | Building | 319 | Union | 40 14 27 N | 083 28 36 W |
| Allens Cemetery | Cemetery | 317 | Muskingum | 39 45 50 N | 081 51 45 W |
| Allens Chapel | Church | 311 | Noble | 39 47 33 N | 081 22 32 W |