Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Allens Chapel Cemetery | Cemetery | 305 | Noble | 39 47 32 N | 081 22 35 W |
| Allensburg | Populated Place | 314 | Highland | 39 12 16 N | 083 46 38 W |
| Allensburgh Post Office (historical) | Post Office | 314 | Highland | 39 12 15 N | 083 46 40 W |
| Allenside Presbyterian Church | Church | 309 | Summit | 41 01 57 N | 081 32 31 W |
| Allensville | Populated Place | 203 | Vinton | 39 16 21 N | 082 36 25 W |
| Allensville Elementary School | School | 202 | Vinton | 39 16 19 N | 082 36 31 W |
| Allentown | Populated Place | 242 | Allen | 40 45 17 N | 084 11 41 W |
| Allentown | Populated Place | 162 | Scioto | 38 41 46 N | 082 51 30 W |
| Allentown Cemetery | Cemetery | 249 | Allen | 40 45 17 N | 084 11 47 W |
| Allentown Post Office (historical) | Post Office | 244 | Allen | 40 45 20 N | 084 11 40 W |
| Allentown United Methodist Church | Church | 245 | Allen | 40 45 17 N | 084 11 44 W |
| Alley Cemetery | Cemetery | 380 | Harrison | 40 10 58 N | 080 53 09 W |
| Alley Park | Park | 247 | Fairfield | 39 41 17 N | 082 34 52 W |
| Allfox School (historical) | School | 297 | Miami | 40 05 17 N | 084 24 22 W |
| Alliance | Populated Place | 353 | Stark | 40 54 55 N | 081 06 21 W |
| Alliance Academy of Cincinnati | School | | Hamilton | 39 08 32 N | 084 28 13 W |
| Alliance Airport | Airport | 325 | Mahoning | 40 54 20 N | 081 03 54 W |
| Alliance Baptist Temple | Church | 340 | Stark | 40 55 51 N | 081 07 41 W |
| Alliance City Cemetery | Cemetery | 324 | Stark | 40 55 57 N | 081 06 47 W |
| Alliance City Hall | Building | 341 | Stark | 40 55 16 N | 081 05 55 W |
| Alliance College (historical) | School | 350 | Stark | 40 55 05 N | 081 06 01 W |
| Alliance Community Hospital | Hospital | 370 | Stark | 40 54 14 N | 081 06 08 W |
| Alliance Country Club | Locale | 357 | Stark | 40 53 41 N | 081 05 34 W |
| Alliance First Friends Church | Church | 347 | Stark | 40 55 10 N | 081 06 14 W |
| Alliance High School | School | 361 | Stark | 40 54 42 N | 081 06 41 W |
| Alliance Jewish Cemetery | Cemetery | 320 | Mahoning | 40 55 49 N | 081 04 40 W |
| Alliance Junction | Populated Place | 334 | Mahoning | 40 55 15 N | 081 02 32 W |
| Alliance Plaza Shopping Center | Locale | 377 | Stark | 40 54 09 N | 081 07 58 W |
| Alliance Post Office | Post Office | 338 | Stark | 40 55 16 N | 081 06 03 W |
| Alliance Post Office | Post Office | 352 | Stark | 40 54 55 N | 081 06 19 W |
| Alliance Public Square | Park | 339 | Stark | 40 55 17 N | 081 05 54 W |
| Allinger School (historical) | School | 302 | Hardin | 40 33 53 N | 083 30 49 W |
| Allison Avenue Baptist Church | Church | 189 | Butler | 39 24 36 N | 084 31 41 W |
| Allison Street Elementary School | School | 198 | Hamilton | 39 09 28 N | 084 27 39 W |
| Allman Run | Stream | | Jefferson | 40 33 52 N | 080 50 02 W |
| Alltop Hollow | Valley | | Lawrence | 38 37 40 N | 082 27 58 W |
| Allyn Hall | Building | 288 | Greene | 39 47 00 N | 084 03 48 W |
| Allyn Hall | Building | 345 | Portage | 41 08 49 N | 081 20 18 W |
| Alma | Populated Place | 193 | Ross | 39 11 17 N | 082 58 44 W |
| Alma Post Office (historical) | Post Office | 191 | Ross | 39 11 15 N | 082 58 45 W |
| Alman Run | Stream | | Vinton | 39 10 44 N | 082 21 43 W |
| Almira Elementary School | School | 225 | Cuyahoga | 41 27 42 N | 081 45 06 W |
| Alms Building | Building | 246 | Hamilton | 39 08 02 N | 084 31 11 W |
| Alms Park | Park | 248 | Hamilton | 39 06 42 N | 084 25 45 W |
| Alp Memorial Park | Park | 244 | Hamilton | 39 04 08 N | 084 21 05 W |
| Alpha | Populated Place | 244 | Greene | 39 42 42 N | 084 01 24 W |
| Alpha and Omega First Baptist Church | Church | 331 | Mahoning | 41 07 44 N | 080 35 02 W |
| Alpha Post Office | Post Office | 244 | Greene | 39 42 40 N | 084 01 25 W |
| Alphia Baptist Church | Church | 194 | Cuyahoga | 41 30 51 N | 081 39 00 W |
| Alpine Dell School (historical) | School | 228 | Clermont | 39 12 03 N | 084 15 59 W |
| Alpine Elementary School | School | 277 | Franklin | 40 05 40 N | 082 58 25 W |
| Alpine Hills Museum | Building | 310 | Tuscarawas | 40 30 12 N | 081 38 30 W |
| Alpine School (historical) | School | 274 | Clermont | 39 04 44 N | 084 03 37 W |
| Alpine Terrace | Populated Place | 273 | Clermont | 39 05 26 N | 084 17 31 W |
| Als Lake | Reservoir | 354 | Columbiana | 40 48 56 N | 080 44 22 W |
| Alspach Cemetery | Cemetery | 242 | Hancock | 41 00 24 N | 083 33 51 W |
| Alt Park | Park | 273 | Fairfield | 39 51 37 N | 082 35 60 W |
| Alta | Populated Place | 392 | Richland | 40 43 57 N | 082 34 11 W |
| Alta Branch Cleveland Public Library | Building | 226 | Cuyahoga | 41 30 30 N | 081 35 45 W |
| Alta Post Office (historical) | Post Office | 392 | Richland | 40 43 55 N | 082 34 10 W |
| Altamont | Populated Place | 347 | Jefferson | 40 20 00 N | 080 37 03 W |
| Altenheim | Building | 295 | Cuyahoga | 41 18 08 N | 081 50 01 W |
| Altenheim Home for the Aged | Building | 204 | Cuyahoga | 41 28 54 N | 081 44 17 W |
| Alter Hall | Building | 202 | Hamilton | 39 08 54 N | 084 28 30 W |
| Alter School | School | 186 | Wood | 41 36 39 N | 083 33 21 W |
| Alternative Learning Center at Longfellow | School | | Montgomery | 39 45 55 N | 084 12 28 W |
| Altiers Lake | Reservoir | 293 | Perry | 39 39 06 N | 082 05 06 W |
| Altiers Lake Dam | Dam | 293 | Perry | 39 39 06 N | 082 05 06 W |
| Altitude | Populated Place | 390 | Monroe | 39 45 11 N | 081 01 24 W |
| Altmann Hall | Building | 344 | Portage | 41 08 34 N | 081 20 14 W |
| Alton | Populated Place | 277 | Franklin | 39 57 01 N | 083 10 29 W |
| Alton Cemetery | Cemetery | 278 | Franklin | 39 57 17 N | 083 10 06 W |
| Alton Post Office (historical) | Post Office | 277 | Franklin | 39 57 00 N | 083 10 30 W |
| Alton Station (historical) | Locale | 281 | Franklin | 39 57 40 N | 083 10 01 W |
| Alton-Hall Elementary School | School | 277 | Franklin | 39 55 44 N | 083 10 37 W |
| Altoona | Populated Place | 221 | Jackson | 39 06 48 N | 082 35 12 W |
| Altstaetter Cemetery | Cemetery | 242 | Allen | 40 51 39 N | 084 05 13 W |
| Alum Cliffs | Cliff | 245 | Ross | 39 18 20 N | 083 04 24 W |
| Alum Creek | Populated Place | 287 | Delaware | 40 16 02 N | 082 56 40 W |
| Alum Creek | Stream | | Franklin | 39 52 52 N | 082 54 27 W |
| Alum Creek Arlington Park | Park | 238 | Franklin | 40 00 51 N | 082 56 34 W |
| Alum Creek Cemetery | Cemetery | 313 | Morrow | 40 24 23 N | 082 51 37 W |
| Alum Creek Church | Church | 315 | Morrow | 40 24 21 N | 082 51 31 W |
| Alum Creek Lake | Reservoir | 254 | Delaware | 40 10 36 N | 082 57 24 W |
| Alum Creek Lake Dam | Dam | 254 | Delaware | 40 10 36 N | 082 57 24 W |
| Alum Creek Park North | Park | 253 | Franklin | 40 07 42 N | 082 56 27 W |
| Alum Creek Park South | Park | 244 | Franklin | 40 06 43 N | 082 56 15 W |
| Alum Creek Plaza Shopping Center | Locale | 242 | Franklin | 40 04 59 N | 082 55 34 W |
| Alum Creek Post Office (historical) | Post Office | 288 | Delaware | 40 16 00 N | 082 56 40 W |
| Alum Creek School (historical) | School | 289 | Delaware | 40 15 59 N | 082 56 24 W |
| Alum Creek State Park | Park | 274 | Delaware | 40 11 30 N | 082 58 23 W |
| Alum Crest School | School | 235 | Franklin | 39 55 33 N | 082 56 15 W |
| Alum Rock | Pillar | 211 | Scioto | 38 48 37 N | 083 10 39 W |
| Alum Run | Stream | | Monroe | 39 43 14 N | 080 52 44 W |
| Alum Run | Stream | | Monroe | 39 39 40 N | 081 00 35 W |
| Alumnae Scholarship House | Building | 229 | Franklin | 39 59 45 N | 083 00 48 W |
| Alumni Gymnasium | Building | 258 | Franklin | 40 07 29 N | 082 56 14 W |
| Alumni Gymnasium | Building | 238 | Franklin | 39 57 19 N | 082 56 10 W |
| Alumni Hall | Building | 283 | Butler | 39 30 28 N | 084 44 11 W |
| Alumni Hall | Building | 244 | Franklin | 39 59 37 N | 082 56 32 W |
| Alumni Hall | Building | 199 | Hamilton | 39 08 52 N | 084 28 36 W |
| Alumni Hall | Building | | Hamilton | 39 06 46 N | 084 33 18 W |
| Alumni Hall | Building | 243 | Montgomery | 39 44 19 N | 084 10 31 W |
| Alumni Hall | Building | 191 | Washington | 39 25 02 N | 081 27 02 W |
| Alumni Memorial Field House | Building | 305 | Licking | 40 04 22 N | 082 31 15 W |
| Alumni Memorial Union | Building | 238 | Hancock | 41 03 12 N | 083 39 08 W |
| Alums Park | Park | 232 | Hamilton | 39 06 41 N | 084 25 42 W |
| Alvada | Populated Place | 258 | Seneca | 41 03 01 N | 083 24 07 W |
| Alvada Post Office | Post Office | 258 | Seneca | 41 03 00 N | 083 24 05 W |
| Alverda Reed Elementary School | School | 280 | Brown | 38 52 06 N | 083 54 32 W |