Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Fort Meigs Shopping Center | Locale | 193 | Wood | 41 32 41 N | 083 37 05 W |
| Fort Meigs State Memorial | Park | 191 | Wood | 41 33 06 N | 083 39 02 W |
| Fort Miami (historical) | Military (Historical) | 191 | Lucas | 41 34 21 N | 083 37 34 W |
| Fort Miami Elementary School | School | 192 | Lucas | 41 34 32 N | 083 37 29 W |
| Fort Miamis State Memorial | Park | 190 | Lucas | 41 34 22 N | 083 37 35 W |
| Fort Recovery | Populated Place | 287 | Mercer | 40 24 46 N | 084 46 35 W |
| Fort Recovery (historical) | Military (Historical) | 282 | Mercer | 40 24 51 N | 084 46 51 W |
| Fort Recovery Church of Christ | Church | 289 | Mercer | 40 24 28 N | 084 46 48 W |
| Fort Recovery Elementary School | School | 288 | Mercer | 40 24 44 N | 084 46 30 W |
| Fort Recovery High School | School | 288 | Mercer | 40 24 43 N | 084 46 30 W |
| Fort Recovery Post Office | Post Office | 287 | Mercer | 40 24 45 N | 084 46 35 W |
| Fort Recovery United Methodist Church | Church | 287 | Mercer | 40 24 49 N | 084 46 31 W |
| Fort Saint Clair Cemetery | Cemetery | 324 | Preble | 39 44 17 N | 084 39 19 W |
| Fort Saint Clair State Park | Park | 317 | Preble | 39 44 26 N | 084 39 13 W |
| Fort Scott | Populated Place | 162 | Hamilton | 39 16 15 N | 084 39 35 W |
| Fort Scott Camps Post Office (historical) | Post Office | 162 | Hamilton | 39 16 15 N | 084 39 35 W |
| Fort Seneca | Populated Place | 213 | Seneca | 41 12 33 N | 083 10 08 W |
| Fort Seneca Bridge | Bridge | 198 | Seneca | 41 12 25 N | 083 09 51 W |
| Fort Seneca Community United Church of Christ | Church | 210 | Seneca | 41 12 23 N | 083 10 05 W |
| Fort Seneca Post Office | Post Office | 213 | Seneca | 41 12 30 N | 083 10 10 W |
| Fort Shawnee | Populated Place | 264 | Allen | 40 41 12 N | 084 08 16 W |
| Fort Stephenson (historical) | Military (Historical) | 191 | Sandusky | 41 20 48 N | 083 07 01 W |
| Fort Steuben Burial Estates | Cemetery | 372 | Jefferson | 40 23 21 N | 080 43 24 W |
| Fort Steuben Historical Site | Park | 217 | Jefferson | 40 21 26 N | 080 36 52 W |
| Fort Steuben Mall Shopping Center | Locale | 356 | Jefferson | 40 21 57 N | 080 40 16 W |
| Fort Street Cemetery | Cemetery | 223 | Athens | 39 27 46 N | 082 13 58 W |
| Fort Trail | Trail | 383 | Highland | 39 06 58 N | 083 24 05 W |
| Fort Washington (historical) | Military (Historical) | 156 | Hamilton | 39 05 58 N | 084 30 22 W |
| Fort Washington Monument | Park | 156 | Hamilton | 39 05 58 N | 084 30 22 W |
| Fort Washington Park | Park | 156 | Hamilton | 39 05 58 N | 084 30 24 W |
| Fortification Hill | Summit | 257 | Gallia | 38 47 52 N | 082 13 20 W |
| Fortman Airport | Airport | 268 | Auglaize | 40 33 19 N | 084 23 12 W |
| Fortune Ditch | Canal | 231 | Lorain | 41 20 43 N | 082 02 03 W |
| Forty Acre Pond | Reservoir | 258 | Auglaize | 40 35 00 N | 084 23 24 W |
| Forty Acre Pond Dam | Dam | 258 | Auglaize | 40 35 00 N | 084 23 24 W |
| Forty Steuben Camp | Locale | 329 | Harrison | 40 15 09 N | 081 12 54 W |
| Forum Shopping Center | Locale | 298 | Marion | 40 34 50 N | 083 05 14 W |
| Foster | Populated Place | 182 | Warren | 39 19 09 N | 084 15 11 W |
| Foster Cemetery | Cemetery | 215 | Defiance | 41 15 12 N | 084 21 58 W |
| Foster Cemetery | Cemetery | 209 | Pike | 39 07 55 N | 082 53 56 W |
| Foster Cemetery | Cemetery | 188 | Pike | 39 08 36 N | 082 56 25 W |
| Foster Chapel Cemetery | Cemetery | 279 | Madison | 39 59 44 N | 083 15 47 W |
| Foster Chapel Methodist Church (historical) | Church | 279 | Madison | 39 59 42 N | 083 15 49 W |
| Foster Ditch | Canal | 228 | Paulding | 41 04 39 N | 084 45 55 W |
| Foster Hall | Building | 189 | Athens | 39 19 28 N | 082 05 39 W |
| Foster Lake | Reservoir | 306 | Harrison | 40 22 12 N | 081 01 29 W |
| Foster Lake Dam | Dam | 306 | Harrison | 40 22 12 N | 081 01 29 W |
| Foster Memorial United Presbyterian Church | Church | 321 | Mahoning | 41 04 22 N | 080 40 22 W |
| Foster Pond | Lake | 290 | Lake | 41 36 45 N | 081 18 12 W |
| Foster School (historical) | School | 345 | Licking | 40 07 53 N | 082 38 54 W |
| Foster School (historical) | School | 269 | Morgan | 39 41 30 N | 081 41 22 W |
| Fosters Landing | Locale | 158 | Adams | 38 38 02 N | 083 19 26 W |
| Fosterville | Populated Place | 323 | Mahoning | 41 04 37 N | 080 40 32 W |
| Fosterville | Populated Place | 318 | Preble | 39 37 33 N | 084 42 12 W |
| Fosterville Branch Library | Building | 314 | Mahoning | 41 04 13 N | 080 40 29 W |
| Fosterville Park | Park | 317 | Mahoning | 41 04 20 N | 080 40 29 W |
| Fostoria | Populated Place | 238 | Seneca | 41 09 25 N | 083 25 01 W |
| Fostoria Area Historical Museum | Building | 237 | Seneca | 41 09 29 N | 083 24 56 W |
| Fostoria Church of the Brethren | Church | 236 | Seneca | 41 09 12 N | 083 24 21 W |
| Fostoria City Hospital | Hospital | 235 | Hancock | 41 09 47 N | 083 25 26 W |
| Fostoria City Hospital Heliport | Airport | 234 | Hancock | 41 09 46 N | 083 25 26 W |
| Fostoria Country Club | Locale | 237 | Hancock | 41 08 51 N | 083 25 57 W |
| Fostoria High School | School | 231 | Wood | 41 10 06 N | 083 25 58 W |
| Fostoria Metropolitan Airport | Airport | 228 | Seneca | 41 11 26 N | 083 23 40 W |
| Fostoria Municipal Building | Building | 238 | Seneca | 41 09 22 N | 083 24 53 W |
| Fostoria Post Office | Post Office | 237 | Seneca | 41 09 28 N | 083 24 60 W |
| Fostoria Reservoir | Reservoir | 241 | Hancock | 41 07 06 N | 083 26 42 W |
| Fostoria Sewage Disposal Plant | Locale | 230 | Wood | 41 10 23 N | 083 25 40 W |
| Fostoria Upground Reservoir Dam | Dam | 241 | Hancock | 41 07 06 N | 083 26 42 W |
| Fought Cemetery | Cemetery | 220 | Paulding | 41 00 44 N | 084 23 03 W |
| Foulks Ditch | Canal | 250 | Defiance | 41 23 57 N | 084 46 22 W |
| Foundation Park | Park | 180 | Ottawa | 41 32 40 N | 082 44 24 W |
| Founders Cemetery | Cemetery | 270 | Guernsey | 40 01 26 N | 081 35 21 W |
| Founders Hall | Building | 352 | Ashland | 40 51 42 N | 082 19 13 W |
| Founders Hall | Building | 320 | Greene | 39 44 49 N | 083 48 37 W |
| Founders Hall | Building | 292 | Hardin | 40 45 58 N | 083 49 53 W |
| Founders Hall | Building | 244 | Montgomery | 39 44 19 N | 084 10 29 W |
| Founders Hall | Building | 231 | Seneca | 41 06 59 N | 083 10 03 W |
| Founders Hall | Building | 355 | Stark | 40 49 28 N | 081 22 32 W |
| Founders Quadrangle | Park | 212 | Wood | 41 22 31 N | 083 38 31 W |
| Foundling Asylum (historical) | Building | 162 | Hamilton | 39 10 02 N | 084 28 17 W |
| Foundry Park | Park | 269 | Allen | 40 42 41 N | 084 05 55 W |
| Fountain Cemetery | Cemetery | 236 | Hancock | 41 09 51 N | 083 25 49 W |
| Fountain Chapel Cemetery | Cemetery | 248 | Mercer | 40 40 09 N | 084 42 23 W |
| Fountain Church | Church | 221 | Fulton | 41 37 25 N | 084 14 32 W |
| Fountain City Historic District | Park | 234 | Williams | 41 28 19 N | 084 33 14 W |
| Fountain Grove Cemetery | Cemetery | 227 | Williams | 41 27 26 N | 084 32 53 W |
| Fountain Grove School (historical) | School | 298 | Union | 40 28 07 N | 083 23 08 W |
| Fountain Hill Cemetery | Cemetery | 317 | Wayne | 40 48 04 N | 081 47 07 W |
| Fountain Manor Nursing Home | Building | 228 | Defiance | 41 17 15 N | 084 45 44 W |
| Fountain Nook School | School | 341 | Wayne | 40 43 43 N | 081 47 40 W |
| Fountain of Life Church | Church | 318 | Darke | 40 05 17 N | 084 37 54 W |
| Fountain Park | Park | 269 | Miami | 40 09 32 N | 084 15 30 W |
| Fountain Park | Park | 234 | Van Wert | 40 52 08 N | 084 35 05 W |
| Fountain Park | Populated Place | 335 | Champaign | 40 09 54 N | 083 33 15 W |
| Fountain Park Post Office (historical) | Post Office | 334 | Champaign | 40 09 55 N | 083 33 15 W |
| Fountain Place Shopping Center | Locale | 167 | Hamilton | 39 06 03 N | 084 30 45 W |
| Fountain School (historical) | School | 292 | Brown | 38 51 13 N | 083 42 10 W |
| Fountain School (historical) | School | 225 | Fulton | 41 41 32 N | 084 14 19 W |
| Fountain School (historical) | School | 237 | Ross | 39 27 00 N | 083 14 14 W |
| Fountain Spring Farm | Locale | 295 | Wayne | 40 58 10 N | 081 49 01 W |
| Fountain Square | Park | 167 | Hamilton | 39 06 04 N | 084 30 37 W |
| Fountain Square Building | Building | 168 | Hamilton | 39 06 06 N | 084 30 40 W |
| Fountain Square Shopping Center | Locale | 270 | Franklin | 40 03 43 N | 082 57 51 W |
| Four Acre Hollow | Valley | | Monroe | 39 39 50 N | 081 07 40 W |
| Four Bridges Country Club | Locale | 258 | Butler | 39 22 51 N | 084 20 50 W |
| Four Corner Star Church of God in Christ | Church | 326 | Summit | 41 03 34 N | 081 29 11 W |
| Four Corners | Populated Place | 380 | Knox | 40 30 27 N | 082 22 52 W |
| Four Corners Cemetery | Cemetery | 402 | Knox | 40 30 54 N | 082 22 44 W |
| Four Corners Cemetery | Cemetery | 338 | Richland | 40 36 23 N | 082 26 43 W |