Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Harris Pond Dam | Reservoir | 340 | Harrison | 40 15 06 N | 081 00 17 W |
| Sally Buffalo Park Dam | Dam | 329 | Harrison | 40 15 30 N | 081 00 17 W |
| Sally Buffalo Park Reservoir | Reservoir | 329 | Harrison | 40 15 30 N | 081 00 17 W |
| Montmere Lake | Reservoir | 329 | Geauga | 41 38 12 N | 081 00 17 W |
| Montmere Lake Dam | Dam | 329 | Geauga | 41 38 12 N | 081 00 17 W |
| Westville Lake | Reservoir | 336 | Columbiana | 40 53 30 N | 081 00 17 W |
| Westville Reservoir Dam | Dam | 336 | Columbiana | 40 53 30 N | 081 00 17 W |
| Cadiz Westgate Elementary School | School | 367 | Harrison | 40 16 44 N | 081 00 15 W |
| Pioneer Church | Church | 287 | Portage | 41 20 50 N | 081 00 15 W |
| Dunn Field | Airport | 291 | Portage | 41 09 21 N | 081 00 14 W |
| Township of Athens | Civil | 343 | Harrison | 40 11 09 N | 081 00 13 W |
| Crawford Cemetery | Cemetery | 390 | Carroll | 40 39 59 N | 081 00 12 W |
| Plainfield Cemetery | Cemetery | 364 | Belmont | 40 03 52 N | 081 00 11 W |
| Township of Cadiz | Civil | 349 | Harrison | 40 16 05 N | 081 00 11 W |
| Harlem Springs | Populated Place | 380 | Carroll | 40 31 15 N | 081 00 11 W |
| Moorehead Cemetery | Cemetery | 396 | Carroll | 40 32 42 N | 081 00 11 W |
| Woods Run | Stream | | Monroe | 39 41 04 N | 081 00 10 W |
| Unionville | Populated Place | 226 | Lake | 41 46 49 N | 081 00 10 W |
| Fairview Cemetery | Cemetery | 366 | Harrison | 40 22 50 N | 081 00 10 W |
| Calm (historical) | Populated Place | 312 | Geauga | 41 41 25 N | 081 00 09 W |
| Calm Post Office (historical) | Post Office | 312 | Geauga | 41 41 25 N | 081 00 09 W |
| Harlem Springs Post Office | Post Office | 378 | Carroll | 40 31 15 N | 081 00 09 W |
| Berlin Dam | Dam | 312 | Portage | 41 02 45 N | 081 00 09 W |
| Berlin Lake | Reservoir | 295 | Portage | 41 02 45 N | 081 00 09 W |
| Driftwood | Populated Place | 178 | Lake | 41 51 10 N | 081 00 08 W |
| Old Unionville Cemetery | Cemetery | 227 | Ashtabula | 41 46 48 N | 081 00 08 W |
| Fly Ferry | Crossing | 178 | Monroe | 39 33 55 N | 081 00 06 W |
| Kilgore | Populated Place | 390 | Carroll | 40 27 51 N | 081 00 06 W |
| Harlem Springs Elementary School | School | 384 | Carroll | 40 31 16 N | 081 00 06 W |
| Flicks Corners | Populated Place | 300 | Portage | 41 05 56 N | 081 00 06 W |
| Puskarich Brothers Lake | Reservoir | 315 | Carroll | 40 33 00 N | 081 00 05 W |
| Puskarich Brothers Lake Dam | Dam | 315 | Carroll | 40 33 00 N | 081 00 05 W |
| Benwood Post Office (historical) | Post Office | 254 | Monroe | 39 41 10 N | 081 00 04 W |
| Kilgore Cemetery | Cemetery | 391 | Carroll | 40 27 48 N | 081 00 04 W |
| Kilgore Post Office (historical) | Post Office | 390 | Carroll | 40 27 50 N | 081 00 04 W |
| Kilgore Elementary School | School | 390 | Carroll | 40 27 42 N | 081 00 03 W |
| Miller Run | Stream | | Monroe | 39 34 03 N | 081 00 02 W |
| Benwood | Populated Place | 250 | Monroe | 39 41 09 N | 081 00 01 W |
| Church of God | Church | 372 | Harrison | 40 16 18 N | 081 00 01 W |
| Kilgore Presbyterian Cemetery | Cemetery | 390 | Carroll | 40 27 37 N | 081 00 00 W |
| Piney Creek | Stream | | Belmont | 39 54 42 N | 080 59 59 W |
| Tri-City Airport | Airport | 360 | Mahoning | 40 54 21 N | 080 59 59 W |
| Lynchburg | Populated Place | 335 | Columbiana | 40 44 28 N | 080 59 57 W |
| Oak Park | Populated Place | 333 | Harrison | 40 15 06 N | 080 59 55 W |
| West Branch Park | Locale | 287 | Trumbull | 41 11 13 N | 080 59 55 W |
| Lloydsville | Populated Place | 359 | Belmont | 40 04 16 N | 080 59 54 W |
| Lloydsville Post Office (historical) | Post Office | 359 | Belmont | 40 04 16 N | 080 59 54 W |
| First Presbyterian Church | Church | 382 | Harrison | 40 16 24 N | 080 59 54 W |
| Harrison County State Forest | Forest | 356 | Harrison | 40 20 09 N | 080 59 54 W |
| Six Point | Populated Place | 268 | Monroe | 39 43 25 N | 080 59 53 W |
| Bruno Pond | Reservoir | 263 | Ashtabula | 41 44 24 N | 080 59 53 W |
| Bruno Pond Dam | Dam | 263 | Ashtabula | 41 44 24 N | 080 59 53 W |
| Wesley Chapel Cemetery | Cemetery | 399 | Belmont | 40 00 27 N | 080 59 52 W |
| Old Cadiz Cemetery | Cemetery | 384 | Harrison | 40 16 10 N | 080 59 52 W |
| Saint Teresa Roman Catholic Church | Church | 381 | Harrison | 40 16 13 N | 080 59 52 W |
| Cadiz Post Office | Post Office | 384 | Harrison | 40 16 25 N | 080 59 52 W |
| Harrison County Courthouse | Building | 385 | Harrison | 40 16 22 N | 080 59 52 W |
| Mill Creek Recreation Area | Park | 317 | Mahoning | 41 00 25 N | 080 59 52 W |
| Joy Fork | Stream | | Belmont | 39 56 28 N | 080 59 51 W |
| Oco | Populated Place | 326 | Belmont | 40 06 35 N | 080 59 51 W |
| Cool Hill | Summit | 388 | Belmont | 39 57 46 N | 080 59 50 W |
| Church of Christ | Church | 376 | Harrison | 40 16 18 N | 080 59 50 W |
| Township of Jackson | Civil | 358 | Monroe | 39 36 36 N | 080 59 48 W |
| Cadiz | Populated Place | 385 | Harrison | 40 16 22 N | 080 59 48 W |
| Georgetown Plant Lower Supply Dam | Dam | 326 | Harrison | 40 13 54 N | 080 59 47 W |
| Georgetown Plant Lower Supply Pond | Reservoir | 326 | Harrison | 40 13 54 N | 080 59 47 W |
| Township of Green | Civil | 315 | Monroe | 39 43 06 N | 080 59 46 W |
| Leiblig Cemetery | Cemetery | 359 | Monroe | 39 47 02 N | 080 59 46 W |
| Jefferson Creek | Stream | | Harrison | 40 22 02 N | 080 59 46 W |
| Drummond Methodist Episcopal Church | Church | 384 | Harrison | 40 16 24 N | 080 59 45 W |
| Taber Mine | Mine | 403 | Harrison | 40 17 54 N | 080 59 45 W |
| New Athens | Populated Place | 361 | Harrison | 40 11 05 N | 080 59 44 W |
| New Athens Post Office | Post Office | 361 | Harrison | 40 11 05 N | 080 59 44 W |
| Bend Fork Cemetery | Cemetery | 343 | Belmont | 39 56 39 N | 080 59 43 W |
| Canyon Park | Populated Place | 305 | Mahoning | 41 04 43 N | 080 59 43 W |
| Bend Fork Church | Church | 343 | Belmont | 39 56 39 N | 080 59 42 W |
| Crabapple Cemetery | Cemetery | 348 | Belmont | 40 09 20 N | 080 59 42 W |
| Crabapple | Populated Place | 285 | Belmont | 39 52 44 N | 080 59 41 W |
| Georgetown Plant Upper Supply Dam | Dam | 328 | Harrison | 40 13 30 N | 080 59 41 W |
| Georgetown Plant Upper Supply Pond | Reservoir | 328 | Harrison | 40 13 30 N | 080 59 41 W |
| Apostolic Church of God | Church | 369 | Harrison | 40 16 21 N | 080 59 41 W |
| WDON-FM (Geneva) | Tower | 193 | Ashtabula | 41 49 16 N | 080 59 41 W |
| Chapel Hill | Summit | 415 | Belmont | 40 00 31 N | 080 59 39 W |
| Snodes Post Office (historical) | Post Office | 341 | Mahoning | 40 57 35 N | 080 59 39 W |
| Beloit Post Office | Post Office | 343 | Mahoning | 40 55 25 N | 080 59 39 W |
| New Alexander Cemetery | Cemetery | 402 | Columbiana | 40 47 14 N | 080 59 39 W |
| Twin Ash Airport | Airport | 368 | Belmont | 40 04 56 N | 080 59 38 W |
| Simpson African Methodist Episcopal Church | Church | 361 | Harrison | 40 16 24 N | 080 59 38 W |
| Peru School (historical) | School | 338 | Mahoning | 40 58 25 N | 080 59 38 W |
| Westville | Populated Place | 345 | Mahoning | 40 54 05 N | 080 59 38 W |
| New Alexander | Populated Place | 396 | Columbiana | 40 47 19 N | 080 59 38 W |
| Snodes | Populated Place | 342 | Mahoning | 40 57 33 N | 080 59 37 W |
| Beech Ridge Church | Church | 355 | Mahoning | 40 56 26 N | 080 59 37 W |
| Beloit | Populated Place | 344 | Mahoning | 40 55 23 N | 080 59 37 W |
| Pfalzgraf Ridge | Ridge | 367 | Monroe | 39 45 43 N | 080 59 35 W |
| Nacco Slurry Refuse Disposal Dam | Dam | 328 | Belmont | 39 55 06 N | 080 59 35 W |
| Nacco Slurry Refuse Impoundment | Reservoir | 328 | Belmont | 39 55 06 N | 080 59 35 W |
| Lake Placentia | Reservoir | 335 | Columbiana | 40 51 12 N | 080 59 35 W |
| Lake Placentia Dam | Dam | 335 | Columbiana | 40 51 12 N | 080 59 35 W |
| Longview Cemetery | Cemetery | 389 | Harrison | 40 11 28 N | 080 59 34 W |
| Perkins Cemetery | Cemetery | 334 | Belmont | 39 54 29 N | 080 59 33 W |
| McCoy Mine | Mine | 364 | Harrison | 40 12 54 N | 080 59 32 W |
| Central Elementary School (historical) | School | 370 | Harrison | 40 16 08 N | 080 59 32 W |
| West Branch High School | School | 354 | Mahoning | 40 54 42 N | 080 59 32 W |
| Cadiz High School | School | 371 | Harrison | 40 16 07 N | 080 59 31 W |
| Saint Catherines Church | Church | 299 | Mahoning | 41 06 29 N | 080 59 31 W |
| Beloit Elementary School | School | 348 | Mahoning | 40 55 25 N | 080 59 31 W |
| Uniontown | Populated Place | 367 | Belmont | 40 07 50 N | 080 59 30 W |
| Decorte Number 2 Mine | Mine | 371 | Harrison | 40 13 10 N | 080 59 29 W |
| Georgetown Coal Preparation Plant | Locale | 347 | Harrison | 40 14 30 N | 080 59 29 W |