Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Hopewell Cemetery | Cemetery | 311 | Knox | 40 20 08 N | 082 23 20 W |
| Hopewell Cemetery | Cemetery | 326 | Monroe | 39 34 52 N | 081 13 36 W |
| Hopewell Cemetery | Cemetery | 313 | Morgan | 39 37 20 N | 081 47 19 W |
| Hopewell Cemetery | Cemetery | 310 | Morgan | 39 36 38 N | 081 52 23 W |
| Hopewell Cemetery | Cemetery | 299 | Preble | 39 36 12 N | 084 45 38 W |
| Hopewell Cemetery | Cemetery | 232 | Seneca | 41 08 08 N | 083 14 08 W |
| Hopewell Cemetery | Cemetery | 289 | Union | 40 21 16 N | 083 17 13 W |
| Hopewell Church | Church | 324 | Auglaize | 40 37 44 N | 083 54 46 W |
| Hopewell Church | Church | 276 | Fairfield | 39 37 01 N | 082 39 50 W |
| Hopewell Church | Church | 217 | Franklin | 39 47 56 N | 082 53 51 W |
| Hopewell Church | Church | 283 | Hardin | 40 41 12 N | 083 29 51 W |
| Hopewell Church | Church | 358 | Holmes | 40 36 21 N | 082 01 27 W |
| Hopewell Church | Church | 311 | Knox | 40 20 09 N | 082 23 19 W |
| Hopewell Church | Church | 403 | Logan | 40 24 47 N | 083 44 39 W |
| Hopewell Church | Church | 321 | Monroe | 39 34 53 N | 081 13 35 W |
| Hopewell Church | Church | 316 | Morgan | 39 36 39 N | 081 52 25 W |
| Hopewell Church | Church | 260 | Perry | 39 51 50 N | 082 17 10 W |
| Hopewell Church | Church | 298 | Preble | 39 36 10 N | 084 45 38 W |
| Hopewell Church | Church | 231 | Seneca | 41 08 15 N | 083 14 18 W |
| Hopewell Church (historical) | Church | 312 | Morgan | 39 37 21 N | 081 47 19 W |
| Hopewell Church Bridge | Bridge | 255 | Perry | 39 51 49 N | 082 16 60 W |
| Hopewell Culture National Historical Park | Park | 195 | Ross | 39 17 57 N | 082 55 10 W |
| Hopewell Culture National Historical Park | Pillar | 197 | Ross | 39 22 34 N | 083 00 17 W |
| Hopewell Elementary School | School | 263 | Butler | 39 20 23 N | 084 21 54 W |
| Hopewell Elementary School | School | 280 | Licking | 39 57 14 N | 082 11 58 W |
| Hopewell Elementary School | School | 189 | Ross | 39 20 18 N | 082 57 31 W |
| Hopewell Farm | Locale | 286 | Adams | 38 44 35 N | 083 38 55 W |
| Hopewell Heights | Populated Place | 186 | Lucas | 41 43 24 N | 083 34 42 W |
| Hopewell Methodist Cemetery | Cemetery | 359 | Jefferson | 40 13 25 N | 080 42 42 W |
| Hopewell Methodist Church | Church | 357 | Jefferson | 40 13 27 N | 080 42 41 W |
| Hopewell Methodist Episcopal Cemetery | Cemetery | 298 | Guernsey | 40 05 48 N | 081 38 42 W |
| Hopewell Methodist Episcopal Cemetery | Cemetery | 260 | Perry | 39 51 51 N | 082 17 09 W |
| Hopewell Middle School | School | 265 | Butler | 39 20 34 N | 084 21 53 W |
| Hopewell Post Office | Post Office | 328 | Muskingum | 39 57 20 N | 082 10 17 W |
| Hopewell Ridge | Ridge | 331 | Washington | 39 34 14 N | 081 13 46 W |
| Hopewell School | School | 263 | Butler | 39 20 24 N | 084 21 54 W |
| Hopewell School | School | 187 | Lucas | 41 43 18 N | 083 35 06 W |
| Hopewell School (historical) | School | 343 | Guernsey | 40 10 54 N | 081 28 10 W |
| Hopewell School (historical) | School | 317 | Knox | 40 20 12 N | 082 23 31 W |
| Hopewell School (historical) | School | 308 | Shelby | 40 18 40 N | 084 18 09 W |
| Hopewell Union Church (historical) | Church | 331 | Muskingum | 39 57 23 N | 082 10 38 W |
| Hopewell United Brethren Cemetery | Cemetery | 301 | Fairfield | 39 44 52 N | 082 42 18 W |
| Hopewell Wesleyan Christian Church | Church | 186 | Lucas | 41 43 17 N | 083 34 60 W |
| Hopewell-loudon School | School | 235 | Seneca | 41 07 41 N | 083 17 11 W |
| Hopkins Cemetery | Cemetery | 204 | Washington | 39 20 30 N | 081 39 20 W |
| Hopkins Cemetery | Cemetery | 207 | Washington | 39 20 54 N | 081 35 15 W |
| Hopkins Elementary School | School | 228 | Lake | 41 39 50 N | 081 18 51 W |
| Hopkins Hall | Building | 230 | Franklin | 40 00 02 N | 083 00 42 W |
| Hopkins Park | Park | 248 | Hamilton | 39 07 03 N | 084 30 30 W |
| Hopkins Park | Park | 248 | Hamilton | 39 07 03 N | 084 30 31 W |
| Hopkins School (historical) | School | 305 | Morgan | 39 30 05 N | 081 53 51 W |
| Hopkins School (historical) | School | 312 | Shelby | 40 24 04 N | 084 01 30 W |
| Hopkinsville | Populated Place | 235 | Warren | 39 20 20 N | 084 13 11 W |
| Hopkinsville Cemetery | Cemetery | 235 | Warren | 39 20 13 N | 084 13 20 W |
| Hopper Research Library | Building | 281 | Mahoning | 41 06 20 N | 080 38 46 W |
| Hopper School (historical) | School | 308 | Darke | 40 14 34 N | 084 41 36 W |
| Hopple Street Viaduct | Bridge | 143 | Hamilton | 39 08 15 N | 084 32 44 W |
| Hopsons Creek | Stream | | Geauga | 41 27 46 N | 081 09 57 W |
| Horace (historical) | Populated Place | 292 | Wayne | 40 44 04 N | 082 04 38 W |
| Horace Mann Elementary School | School | 266 | Allen | 40 44 52 N | 084 07 34 W |
| Horace Mann Elementary School | School | 287 | Stark | 40 48 02 N | 081 31 42 W |
| Horace Mann Elementary School | School | 277 | Trumbull | 41 13 39 N | 080 50 13 W |
| Horace Mann Elementary School | School | 235 | Van Wert | 40 52 34 N | 084 34 31 W |
| Horace Mann Memorial Monument | Park | 311 | Greene | 39 47 08 N | 083 52 13 W |
| Horace Mann Montessori School | School | 293 | Montgomery | 39 43 41 N | 084 09 28 W |
| Horace Mann Public School (historical) | School | 231 | Columbiana | 40 38 06 N | 080 32 50 W |
| Horace Mann School | School | 193 | Lucas | 41 41 30 N | 083 38 02 W |
| Horace Mann School | School | 332 | Stark | 40 48 58 N | 081 20 23 W |
| Horatio | Populated Place | 308 | Darke | 40 08 58 N | 084 31 30 W |
| Horatio Post Office (historical) | Post Office | 308 | Darke | 40 09 00 N | 084 31 30 W |
| Hords (historical) | Populated Place | 277 | Marion | 40 35 33 N | 083 11 35 W |
| Horeb | Populated Place | 263 | Jackson | 38 54 12 N | 082 36 44 W |
| Horeb Cemetery | Cemetery | 263 | Jackson | 38 54 03 N | 082 36 46 W |
| Horeb Cemetery | Cemetery | 242 | Van Wert | 40 48 02 N | 084 26 03 W |
| Horeb Church | Church | 287 | Belmont | 39 54 50 N | 081 03 00 W |
| Horeb Church | Church | 265 | Jackson | 38 54 06 N | 082 36 47 W |
| Horeb Church (historical) | Church | 242 | Van Wert | 40 48 03 N | 084 25 57 W |
| Horizon Heliport | Airport | 152 | Hamilton | 39 07 09 N | 084 24 59 W |
| Horizon Science Academy | School | 232 | Cuyahoga | 41 27 06 N | 081 45 47 W |
| Horizons Heliport | Airport | 148 | Hamilton | 39 07 21 N | 084 24 36 W |
| Horn Cemetery | Cemetery | 320 | Auglaize | 40 38 22 N | 083 58 30 W |
| Horn Ditch | Canal | 350 | Darke | 40 01 33 N | 084 47 25 W |
| Horn Family Cemetery | Cemetery | 240 | Hancock | 41 04 51 N | 083 50 32 W |
| Horn School (historical) | School | 354 | Knox | 40 32 19 N | 082 15 45 W |
| Horn School (historical) | School | 346 | Knox | 40 19 50 N | 082 18 15 W |
| Hornbeck School (historical) | School | 228 | Pickaway | 39 35 51 N | 083 05 01 W |
| Horne (historical) | Populated Place | 228 | Perry | 39 45 33 N | 082 05 38 W |
| Horner Branch Upper Twin Creek | Stream | | Scioto | 38 41 54 N | 083 16 01 W |
| Horner Cemetery | Cemetery | 261 | Adams | 38 58 28 N | 083 38 05 W |
| Horner Hill | Populated Place | 231 | Meigs | 39 06 17 N | 082 05 58 W |
| Horner Hill | Summit | 344 | Highland | 39 13 23 N | 083 42 24 W |
| Horner Hill Cemetery | Cemetery | 286 | Meigs | 39 06 42 N | 082 06 03 W |
| Horner Hollow | Valley | | Scioto | 38 49 33 N | 082 58 50 W |
| Horner Run | Stream | | Clermont | 39 11 52 N | 084 16 32 W |
| Horney School (historical) | School | 310 | Darke | 40 16 56 N | 084 47 07 W |
| Horning Airport | Airport | 360 | Crawford | 40 44 10 N | 082 45 10 W |
| Horns Hill Park | Park | 308 | Licking | 40 05 30 N | 082 24 29 W |
| Horns Mill | Populated Place | 243 | Fairfield | 39 39 03 N | 082 33 01 W |
| Horse Cave Creek | Stream | | Meigs | 39 03 58 N | 081 53 53 W |
| Horse Creek | Stream | | Gallia | 38 37 10 N | 082 10 22 W |
| Horse Creek | Stream | | Jackson | 39 03 26 N | 082 38 34 W |
| Horse Hollow | Valley | | Monroe | 39 43 27 N | 081 03 00 W |
| Horse Run | Stream | | Morgan | 39 41 06 N | 081 41 45 W |
| Horse Run | Stream | | Paulding | 41 04 17 N | 084 32 15 W |
| Horse Run | Stream | | Washington | 39 24 49 N | 081 35 12 W |
| Horse Shoe Bottom | Flat | 266 | Delaware | 40 18 23 N | 083 03 39 W |
| Horseback Knob | Summit | 403 | Ross | 39 14 16 N | 083 05 27 W |
| Horsemill Hill | Summit | 378 | Belmont | 39 56 28 N | 080 48 58 W |
| Horseshoe Bend | Bend | 220 | Adams | 38 59 03 N | 083 25 48 W |
| Horseshoe Bend | Bend | 253 | Miami | 40 00 41 N | 084 19 24 W |