Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Locust Grove School (historical) | School | 313 | Clinton | 39 29 48 N | 083 35 36 W |
| Locust Grove School (historical) | School | 295 | Fayette | 39 28 20 N | 083 23 10 W |
| Locust Grove School (historical) | School | 332 | Greene | 39 39 15 N | 083 40 22 W |
| Locust Grove School (historical) | School | 224 | Hamilton | 39 11 54 N | 084 48 02 W |
| Locust Grove School (historical) | School | 266 | Jackson | 39 05 32 N | 082 30 35 W |
| Locust Grove School (historical) | School | 354 | Knox | 40 29 49 N | 082 20 39 W |
| Locust Grove School (historical) | School | 307 | Perry | 39 45 39 N | 082 09 18 W |
| Locust Grove School (historical) | School | 255 | Pickaway | 39 31 58 N | 083 11 42 W |
| Locust Grove Wesleyan Church | Church | 238 | Adams | 38 59 35 N | 083 22 37 W |
| Locust Hill Farm (historical) | Locale | 282 | Licking | 40 05 08 N | 082 20 03 W |
| Locust Hills Golf Course | Locale | 326 | Clark | 39 50 18 N | 083 44 35 W |
| Locust Lake | Populated Place | 268 | Clermont | 39 01 35 N | 084 13 60 W |
| Locust Lake | Reservoir | 264 | Clermont | 39 01 32 N | 084 14 06 W |
| Locust Point | Cape | 175 | Ottawa | 41 36 59 N | 083 07 40 W |
| Locust Point | Cliff | 176 | Ottawa | 41 35 18 N | 083 05 40 W |
| Locust Point | Populated Place | 175 | Ottawa | 41 35 18 N | 083 05 38 W |
| Locust Point Cemetery | Cemetery | 177 | Ottawa | 41 35 45 N | 083 06 21 W |
| Locust Reef | Bar | 174 | Ottawa | 41 38 45 N | 083 03 60 W |
| Locust Ridge | Populated Place | 277 | Brown | 38 59 31 N | 084 00 26 W |
| Locustgrove | Populated Place | 317 | Clark | 39 53 15 N | 083 45 16 W |
| Locustgrove Post Office (historical) | Post Office | 239 | Adams | 38 59 18 N | 083 22 41 W |
| Locustgrove Post Office (historical) | Post Office | 239 | Allen | 38 59 20 N | 083 22 40 W |
| Locustridge Post Office (historical) | Post Office | 279 | Brown | 38 59 30 N | 084 00 25 W |
| Lodge Ridge | Ridge | 290 | Lawrence | 38 35 48 N | 082 32 46 W |
| Lodge Ridge Cemetery | Cemetery | 283 | Lawrence | 38 35 37 N | 082 32 22 W |
| Lodi | Populated Place | 283 | Medina | 41 02 00 N | 082 00 44 W |
| Lodi | Populated Place | 196 | Monroe | 39 36 40 N | 080 56 24 W |
| Lodi Branch Medina County District Library | Building | 283 | Medina | 41 01 55 N | 082 00 36 W |
| Lodi Community Hospital | Hospital | 293 | Medina | 41 02 09 N | 082 00 52 W |
| Lodi Community Hospital Heliport | Airport | 293 | Medina | 41 02 09 N | 082 00 52 W |
| Lodi Elementary School | School | 296 | Medina | 41 02 00 N | 082 00 28 W |
| Lodi Post Office | Post Office | 282 | Medina | 41 02 00 N | 082 00 45 W |
| Lodi United Methodist Church | Church | 299 | Medina | 41 02 08 N | 082 00 35 W |
| Loehmanns Plaza Shopping Center | Locale | 237 | Hamilton | 39 17 34 N | 084 23 31 W |
| Loehmans Plaza Shopping Center | Locale | 255 | Lake | 41 35 07 N | 081 28 54 W |
| Lofinos Plaza Shopping Center | Locale | 280 | Montgomery | 39 49 36 N | 084 07 19 W |
| Log Cabin Bay | Bay | 272 | Harrison | 40 16 00 N | 081 15 11 W |
| Log Pile Cemetery | Cemetery | 287 | Vinton | 39 14 33 N | 082 38 42 W |
| Log Pile Church | Church | 279 | Vinton | 39 14 33 N | 082 38 45 W |
| Log Pile Ridge | Ridge | 305 | Vinton | 39 13 53 N | 082 39 06 W |
| Log Pond Run | Stream | | Licking | 40 03 50 N | 082 23 52 W |
| Logan | Populated Place | 248 | Defiance | 41 21 13 N | 084 44 53 W |
| Logan | Populated Place | 226 | Hocking | 39 32 24 N | 082 24 26 W |
| Logan (historical) | Populated Place | 301 | Marion | 40 36 18 N | 083 04 25 W |
| Logan Camp | Locale | 231 | Hocking | 39 31 08 N | 082 23 20 W |
| Logan Cemetery | Cemetery | 283 | Trumbull | 41 28 25 N | 080 37 45 W |
| Logan Church | Church | 254 | Defiance | 41 21 14 N | 084 44 47 W |
| Logan County | Civil | 373 | Logan | 40 22 00 N | 083 46 00 W |
| Logan County Courthouse | Building | 380 | Logan | 40 21 39 N | 083 45 34 W |
| Logan County District Library | Building | 381 | Logan | 40 21 44 N | 083 45 33 W |
| Logan County Fairgrounds | Locale | 373 | Logan | 40 20 54 N | 083 45 30 W |
| Logan County Historical Society Museum | Building | 395 | Logan | 40 21 34 N | 083 45 02 W |
| Logan County Home | Building | 332 | Logan | 40 24 01 N | 083 48 26 W |
| Logan Elm High School | School | 261 | Pickaway | 39 33 39 N | 082 51 06 W |
| Logan Elm State Memorial | Park | 208 | Pickaway | 39 30 35 N | 082 57 22 W |
| Logan Elm Village | Populated Place | 214 | Pickaway | 39 34 11 N | 082 57 07 W |
| Logan Gap | Gap | 189 | Brown | 38 42 33 N | 083 48 21 W |
| Logan Hall | Building | 195 | Hamilton | 39 08 57 N | 084 28 31 W |
| Logan Hall | Building | 244 | Hamilton | 39 08 21 N | 084 30 09 W |
| Logan High School | School | 239 | Hocking | 39 32 38 N | 082 24 33 W |
| Logan Plaza Shopping Center | Locale | 219 | Hocking | 39 32 13 N | 082 23 55 W |
| Logan Post Office | Post Office | 227 | Hocking | 39 32 27 N | 082 24 31 W |
| Logan T Johnston Hall | Building | 237 | Butler | 39 31 26 N | 084 21 28 W |
| Logan-Hocking County District Library | Building | 225 | Hocking | 39 32 24 N | 082 24 19 W |
| Logans Chance Airport | Airport | 328 | Clark | 39 59 48 N | 083 51 17 W |
| Logansville | Populated Place | 308 | Logan | 40 20 44 N | 083 55 50 W |
| Logansville Cemetery | Cemetery | 316 | Logan | 40 20 56 N | 083 55 47 W |
| Logansville Community Church | Church | 312 | Logan | 40 20 46 N | 083 55 43 W |
| Loganville Post Office (historical) | Post Office | 308 | Logan | 40 20 45 N | 083 55 50 W |
| Loghaven | Populated Place | 293 | Belmont | 40 09 38 N | 081 10 52 W |
| Logtown | Populated Place | 292 | Columbiana | 40 47 03 N | 080 47 36 W |
| Logtown | Populated Place | 231 | Paulding | 41 00 15 N | 084 44 45 W |
| Logtown | Populated Place | 364 | Portage | 41 01 32 N | 081 23 35 W |
| Logtown School (historical) | School | 231 | Paulding | 41 00 14 N | 084 44 44 W |
| Lohman Complex | Building | 238 | Franklin | 39 57 17 N | 082 56 13 W |
| Lohr School | School | 329 | Stark | 40 44 31 N | 081 27 20 W |
| Lohrey School | School | 283 | Montgomery | 39 44 00 N | 084 08 21 W |
| Lombard School | School | 168 | Lawrence | 38 30 32 N | 082 39 41 W |
| Lombard School (historical) | School | 298 | Madison | 40 05 17 N | 083 21 54 W |
| Lombardsville | Populated Place | 220 | Scioto | 38 49 15 N | 083 07 59 W |
| Lombardville Post Office (historical) | Post Office | 220 | Scioto | 38 49 15 N | 083 07 60 W |
| Lombardy Heights (subdivision) | Populated Place | 229 | Belmont | 40 04 23 N | 080 44 30 W |
| Lombardy Heights (subdivision) | Populated Place | 235 | Franklin | 39 50 57 N | 082 48 21 W |
| Lomond Elementary School | School | 313 | Cuyahoga | 41 27 38 N | 081 33 15 W |
| London | Populated Place | 321 | Madison | 39 53 11 N | 083 26 54 W |
| London | Populated Place | 332 | Richland | 40 54 37 N | 082 37 46 W |
| London City Building | Building | 321 | Madison | 39 53 08 N | 083 26 50 W |
| London Commercial Business Historic District | Park | 321 | Madison | 39 53 10 N | 083 26 56 W |
| London Correctional Institution | Building | 329 | Madison | 39 54 19 N | 083 29 02 W |
| London Correctional Institution Administration Building | Building | 329 | Madison | 39 54 18 N | 083 29 01 W |
| London Country Club | Locale | 306 | Madison | 39 55 18 N | 083 24 31 W |
| London Elementary School | School | 319 | Madison | 39 53 15 N | 083 26 39 W |
| London Fish Hatchery | Locale | 338 | Madison | 39 53 54 N | 083 30 35 W |
| London High School | School | 323 | Madison | 39 54 24 N | 083 26 58 W |
| London Hollow | Valley | | Licking | 40 05 02 N | 082 19 37 W |
| London Middle School | School | 319 | Madison | 39 53 13 N | 083 26 43 W |
| London Plaza Shopping Center | Locale | 322 | Madison | 39 53 28 N | 083 26 41 W |
| London Post Office | Post Office | 319 | Madison | 39 53 06 N | 083 26 57 W |
| London Primary School | School | 319 | Madison | 39 53 15 N | 083 26 45 W |
| London Public Library | Building | 321 | Madison | 39 53 08 N | 083 26 44 W |
| London Square Shopping Center | Locale | 315 | Madison | 39 53 00 N | 083 27 18 W |
| Londonderry | Populated Place | 355 | Guernsey | 40 09 17 N | 081 18 01 W |
| Londonderry | Populated Place | 210 | Ross | 39 16 00 N | 082 47 26 W |
| Londonderry Cemetery | Cemetery | 208 | Ross | 39 16 13 N | 082 48 05 W |
| Londonderry Elementary School | School | 208 | Ross | 39 16 03 N | 082 47 48 W |
| Londonderry Post Office | Post Office | 210 | Ross | 39 16 00 N | 082 47 25 W |
| Londonderry Post Office (historical) | Post Office | 346 | Guernsey | 40 09 15 N | 081 17 59 W |
| Londonderry School | School | 364 | Guernsey | 40 09 13 N | 081 18 43 W |
| Lone Elm School (historical) | School | 314 | Clinton | 39 31 07 N | 083 37 12 W |
| Lone Oak School (historical) | School | 296 | Hardin | 40 40 30 N | 083 49 59 W |