Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Avalon Heights | Populated Place | 257 | Warren | 39 25 15 N | 084 12 50 W |
| Avery | Populated Place | 198 | Erie | 41 19 40 N | 082 37 15 W |
| Avery Air Service Airport | Airport | 206 | Wood | 41 22 34 N | 083 41 46 W |
| Avery Elementary School | School | 284 | Franklin | 40 02 32 N | 083 09 20 W |
| Avery Hall | Building | 205 | Lake | 41 42 55 N | 081 15 08 W |
| Avery Park | Park | 280 | Franklin | 40 07 17 N | 083 09 33 W |
| Avery Post Office (historical) | Post Office | 198 | Erie | 41 19 40 N | 082 37 15 W |
| Avery Terrace (subdivision) | Populated Place | 196 | Lake | 41 43 52 N | 081 14 30 W |
| Aviation High School | School | 174 | Cuyahoga | 41 31 20 N | 081 40 08 W |
| Avila Hall School | School | 271 | Hamilton | 39 06 59 N | 084 35 36 W |
| Avins Ditch | Canal | 189 | Lorain | 41 28 04 N | 082 03 16 W |
| Avis | Populated Place | 221 | Putnam | 41 01 15 N | 084 10 09 W |
| Avlon | Populated Place | 299 | Perry | 39 44 38 N | 082 23 06 W |
| Avlon Post Office (historical) | Post Office | 297 | Perry | 39 44 40 N | 082 23 05 W |
| Avoca Park | Populated Place | 149 | Hamilton | 39 08 20 N | 084 20 28 W |
| Avon | Populated Place | 203 | Lorain | 41 27 06 N | 082 02 08 W |
| Avon Airport | Airport | 211 | Lorain | 41 25 45 N | 081 59 45 W |
| Avon Baptist Church | Church | 266 | Cuyahoga | 41 27 04 N | 081 36 32 W |
| Avon Basin | Basin | 174 | Lorain | 41 30 24 N | 082 03 10 W |
| Avon Cemetery | Cemetery | 212 | Lorain | 41 27 32 N | 082 01 12 W |
| Avon Center | Populated Place | 209 | Lorain | 41 27 35 N | 082 01 11 W |
| Avon East Elementary School | School | 210 | Lorain | 41 26 44 N | 081 59 26 W |
| Avon Elementary School | School | 203 | Lorain | 41 27 20 N | 082 01 50 W |
| Avon Field | Park | 188 | Hamilton | 39 09 42 N | 084 28 42 W |
| Avon High School | School | 209 | Lorain | 41 26 43 N | 082 01 42 W |
| Avon Lake | Populated Place | 185 | Lorain | 41 30 19 N | 082 01 42 W |
| Avon Lake Boat Club | Locale | 178 | Lorain | 41 30 48 N | 082 01 10 W |
| Avon Lake High School | School | 184 | Lorain | 41 30 30 N | 082 01 04 W |
| Avon Lake Post Office | Post Office | 184 | Lorain | 41 30 20 N | 082 01 40 W |
| Avon Lake Post Office (historical) | Post Office | 198 | Lorain | 41 27 05 N | 082 02 10 W |
| Avon Lake Presbyterian Church | Church | 185 | Lorain | 41 30 22 N | 082 02 02 W |
| Avon Lake Public Library | Building | 183 | Lorain | 41 30 36 N | 082 00 48 W |
| Avon Lake United Church of Christ | Church | 182 | Lorain | 41 30 32 N | 082 01 17 W |
| Avon Oaks Country Club | Locale | 197 | Lorain | 41 27 37 N | 081 58 32 W |
| Avon Park | Park | 209 | Lorain | 41 26 15 N | 081 59 50 W |
| Avon Park | Park | 301 | Summit | 41 07 02 N | 081 30 46 W |
| Avon Plaza Shopping Center | Locale | 202 | Lorain | 41 27 09 N | 082 02 07 W |
| Avon Point | Populated Place | 180 | Lorain | 41 30 48 N | 082 01 04 W |
| Avondale | Populated Place | 207 | Belmont | 39 58 46 N | 080 44 28 W |
| Avondale | Populated Place | 219 | Hamilton | 39 08 52 N | 084 29 42 W |
| Avondale | Populated Place | 310 | Logan | 40 31 14 N | 083 52 25 W |
| Avondale | Populated Place | 236 | Montgomery | 39 47 36 N | 084 08 35 W |
| Avondale | Populated Place | 218 | Muskingum | 39 52 14 N | 082 03 35 W |
| Avondale | Populated Place | 346 | Stark | 40 49 35 N | 081 24 51 W |
| Avondale Arboretum | Park | 317 | Stark | 40 50 20 N | 081 24 31 W |
| Avondale Elementary School | School | 216 | Franklin | 39 57 22 N | 083 01 33 W |
| Avondale Elementary School | School | 335 | Stark | 40 49 53 N | 081 25 12 W |
| Avondale State Wildlife Area | Park | 279 | Perry | 39 48 20 N | 082 07 40 W |
| Avondale Synagogue | Church | 223 | Hamilton | 39 08 47 N | 084 29 20 W |
| Avondale Town Center Shopping Center | Locale | 220 | Hamilton | 39 08 43 N | 084 29 24 W |
| Avondale United Methodist Church | Church | 216 | Franklin | 39 57 26 N | 083 01 37 W |
| Avondale Wildlife Area Dam Number One | Dam | 282 | Muskingum | 39 50 24 N | 082 06 18 W |
| Avondale Wildlife Area Dam Number Two | Dam | 255 | Muskingum | 39 50 36 N | 082 05 42 W |
| Avondale Wildlife Area Reservoir Number One | Reservoir | 282 | Muskingum | 39 50 24 N | 082 06 18 W |
| Avondale Wildlife Area Reservoir Number Two | Reservoir | 255 | Muskingum | 39 50 36 N | 082 05 42 W |
| Ax Factory Run | Stream | | Mahoning | 41 04 45 N | 080 41 18 W |
| Axe Factory Cemetery | Cemetery | 229 | Huron | 41 12 59 N | 082 37 32 W |
| Axtel | Populated Place | 233 | Erie | 41 22 07 N | 082 21 50 W |
| Axtel Post Office (historical) | Post Office | 234 | Erie | 41 22 05 N | 082 21 50 W |
| Axtel School (historical) | School | 277 | Vinton | 39 11 16 N | 082 23 41 W |
| Ayer Elementary School | School | 263 | Hamilton | 39 03 38 N | 084 19 20 W |
| Ayer Hall | Building | 319 | Summit | 41 04 34 N | 081 30 47 W |
| Ayers Cemetery | Cemetery | 300 | Franklin | 40 01 54 N | 082 49 04 W |
| Ayers Cemetery | Cemetery | 233 | Fulton | 41 35 46 N | 084 13 47 W |
| Ayers Creek | Stream | | Wood | 41 36 05 N | 083 23 10 W |
| Ayersville | Populated Place | 223 | Defiance | 41 14 19 N | 084 17 08 W |
| Ayersville Elementary School | School | 223 | Defiance | 41 14 12 N | 084 17 05 W |
| Ayersville High School | School | 223 | Defiance | 41 14 15 N | 084 17 05 W |
| Ayersville Post Office (historical) | Post Office | 223 | Defiance | 41 14 20 N | 084 17 10 W |
| Ayersville United Methodist Church | Church | 225 | Defiance | 41 14 18 N | 084 16 58 W |
| Aylworth Creek | Stream | | Geauga | 41 39 44 N | 081 10 57 W |
| Ayre Ditch | Stream | | Van Wert | 40 42 48 N | 084 36 25 W |
| Ayres Branch Library | Building | 302 | Summit | 41 06 40 N | 081 34 19 W |
| Aztec Subdivision | Populated Place | 185 | Wood | 41 37 02 N | 083 27 51 W |
| B & O Railroad Pond | Reservoir | 279 | Guernsey | 39 57 42 N | 081 16 47 W |
| B & O Railroad Pond 1025-006 | Reservoir | 274 | Huron | 41 03 42 N | 082 44 18 W |
| B & O Railroad Pond 1025-006 Dam | Dam | 274 | Huron | 41 03 42 N | 082 44 18 W |
| B & O Railroad Pond 1026-001 | Reservoir | 275 | Huron | 41 03 54 N | 082 45 30 W |
| B & O Railroad Pond 1026-001 Dam | Dam | 275 | Huron | 41 03 54 N | 082 45 30 W |
| B & O Railroad Pond Dam | Dam | 315 | Belmont | 40 09 18 N | 081 06 35 W |
| B & O Railroad Pond Dam | Dam | 280 | Guernsey | 39 57 42 N | 081 16 47 W |
| B & O Railroad Pond Dam | Reservoir | 290 | Belmont | 40 09 18 N | 081 06 35 W |
| B and B Mine | Mine | 382 | Harrison | 40 16 29 N | 081 02 09 W |
| B F Stanton Junior High School | School | 349 | Stark | 40 55 07 N | 081 06 22 W |
| B'nai Abraham | Church | 216 | Lorain | 41 22 51 N | 082 05 42 W |
| B'nai Israel Congregation | Church | 261 | Fairfield | 39 42 45 N | 082 36 04 W |
| B'nai Israel Temple | Church | 231 | Columbiana | 40 37 16 N | 080 35 08 W |
| Baars Tennis Courts | Park | 292 | Knox | 40 22 14 N | 082 23 35 W |
| Bab Cemetery | Cemetery | 311 | Greene | 39 35 46 N | 083 48 33 W |
| Babb Cemetery | Cemetery | 294 | Greene | 39 34 52 N | 083 54 29 W |
| Babb Run | Stream | | Summit | 41 07 29 N | 081 31 05 W |
| Babb Run Park | Park | 267 | Summit | 41 07 38 N | 081 31 02 W |
| Babble Brook | Stream | | Richland | 40 33 38 N | 082 23 32 W |
| Babbtown (historical) | Populated Place | 241 | Miami | 39 58 13 N | 084 08 22 W |
| Babbtown School (historical) | School | 292 | Greene | 39 34 58 N | 083 54 17 W |
| Babcock Hall | Building | 337 | Wayne | 40 48 46 N | 081 56 01 W |
| Babeck Elementary School | School | 196 | Butler | 39 28 23 N | 084 27 27 W |
| Bachelier Park | Park | 270 | Clermont | 38 59 44 N | 084 10 56 W |
| Bachelor Hall | Building | 267 | Butler | 39 30 26 N | 084 43 47 W |
| Bacher Ditch | Canal | 260 | Wyandot | 40 56 09 N | 083 26 43 W |
| Bachman | Populated Place | 320 | Montgomery | 39 51 46 N | 084 27 26 W |
| Bachman Cemetery | Cemetery | 321 | Montgomery | 39 51 41 N | 084 27 36 W |
| Bachman Post Office (historical) | Post Office | 320 | Montgomery | 39 51 45 N | 084 27 25 W |
| Back Achers Heliport | Airport | 231 | Cuyahoga | 41 24 12 N | 081 54 29 W |
| Back Hollow | Valley | | Ross | 39 10 29 N | 082 56 37 W |
| Back of Howells Pond | Reservoir | 175 | Lucas | 41 41 25 N | 083 19 04 W |
| Back Run | Stream | | Clermont | 39 01 05 N | 084 09 15 W |
| Back Run | Stream | | Muskingum | 39 48 09 N | 081 53 39 W |
| Back Run | Stream | | Scioto | 38 54 29 N | 082 53 30 W |
| Back Run School (historical) | School | 246 | Muskingum | 39 45 31 N | 081 55 19 W |