Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Jordan Creek | Stream | | Hamilton | 39 10 47 N | 084 44 50 W |
| Jordan Creek | Stream | | Lake | 41 40 56 N | 081 13 20 W |
| Jordan Creek | Stream | | Logan | 40 27 19 N | 083 53 27 W |
| Jordan Run | Stream | | Athens | 39 15 58 N | 081 49 13 W |
| Jordan Run | Stream | | Hardin | 40 36 05 N | 083 39 29 W |
| Jordan School (historical) | School | 279 | Brown | 39 08 23 N | 083 57 44 W |
| Jordan School (historical) | School | 212 | Morgan | 39 38 49 N | 081 36 05 W |
| Jordan Shcool (historical) | School | 235 | Fulton | 41 40 13 N | 084 05 38 W |
| Jordan Temple | Church | 186 | Lucas | 41 40 17 N | 083 32 60 W |
| Jordans Memorial Church of God in Christ | Church | 231 | Franklin | 39 57 18 N | 082 56 46 W |
| Jordanville | Populated Place | 290 | Columbiana | 40 46 11 N | 080 45 22 W |
| Jordon Creek | Stream | | Darke | 40 17 20 N | 084 50 24 W |
| Josaphat Arts Hall | Building | | Cuyahoga | 41 30 45 N | 081 40 05 W |
| Joseph and Feiss Building | Building | 198 | Cuyahoga | 41 29 58 N | 081 41 57 W |
| Joseph Building | Building | 200 | Hamilton | 39 08 56 N | 084 28 47 W |
| Joseph E Keller Hall | Building | 238 | Montgomery | 39 44 27 N | 084 10 47 W |
| Joseph F Landis Elementary School | School | 195 | Cuyahoga | 41 31 26 N | 081 37 06 W |
| Joseph H Miller Farm Cemetery | Cemetery | 348 | Holmes | 40 31 13 N | 081 48 47 W |
| Joseph Helmuth Farm Cemetery | Cemetery | 333 | Wayne | 40 40 28 N | 081 50 30 W |
| Joseph M Gallagher School | School | 207 | Cuyahoga | 41 28 50 N | 081 43 58 W |
| Joseph Skilken and Company Heliport | Airport | 231 | Franklin | 39 57 19 N | 082 59 50 W |
| Josephatowa | Populated Place | 192 | Cuyahoga | 41 30 50 N | 081 40 11 W |
| Josephium College | School | 278 | Franklin | 40 07 15 N | 083 01 08 W |
| Joshua Dixon Primary School | School | 339 | Columbiana | 40 53 39 N | 080 41 52 W |
| Josiah H Blackmore Library | Building | 238 | Franklin | 39 57 24 N | 082 56 16 W |
| Josiah Harris Elementary School | School | 211 | Lorain | 41 23 37 N | 082 14 15 W |
| Journal Island | Island | 272 | Fairfield | 39 54 56 N | 082 29 54 W |
| Joy | Populated Place | 209 | Morgan | 39 28 13 N | 081 56 28 W |
| Joy Cemetery | Cemetery | 192 | Lucas | 41 39 56 N | 083 39 13 W |
| Joy Cemetery | Cemetery | 219 | Morgan | 39 28 34 N | 081 56 33 W |
| Joy Christian Church | Church | 214 | Morgan | 39 28 09 N | 081 56 21 W |
| Joy Fork | Stream | | Belmont | 39 56 28 N | 080 59 51 W |
| Joy Hollow | Valley | | Monroe | 39 38 14 N | 081 10 15 W |
| Joy Methodist Episcopal Church (historical) | Church | 212 | Morgan | 39 28 32 N | 081 56 34 W |
| Joy Plant Heliport | Airport | 326 | Cuyahoga | 41 23 26 N | 081 28 16 W |
| Joy Post Office (historical) | Post Office | 200 | Morgan | 39 28 15 N | 081 56 30 W |
| Joy Run | Stream | | Morgan | 39 28 27 N | 081 56 36 W |
| Joyce | Populated Place | 270 | Tuscarawas | 40 27 18 N | 081 30 10 W |
| Joyce Park | Park | 169 | Butler | 39 21 15 N | 084 34 53 W |
| Joyce Post Office (historical) | Post Office | 282 | Tuscarawas | 40 27 20 N | 081 31 09 W |
| Joyner House | Building | 276 | Butler | 39 30 25 N | 084 44 14 W |
| JTV Heliport | Airport | 190 | Lake | 41 49 01 N | 081 04 08 W |
| Jubilee Park | Park | 235 | Van Wert | 40 52 45 N | 084 34 51 W |
| Jubilee Temple Church | Church | 338 | Summit | 41 03 49 N | 081 33 17 W |
| Judah Bible Institute | School | 228 | Franklin | 39 56 56 N | 083 02 28 W |
| Judd Cemetery | Cemetery | 254 | Athens | 39 20 23 N | 082 16 54 W |
| Judge J W Peck Federal Building | Building | 168 | Hamilton | 39 06 08 N | 084 30 34 W |
| Judges Lake | Reservoir | 298 | Medina | 41 12 14 N | 081 41 59 W |
| Judson Baptist Church | Church | 191 | Lucas | 41 42 25 N | 083 36 49 W |
| Judys Airport | Airport | 284 | Montgomery | 39 38 00 N | 084 26 60 W |
| Jug Run | Populated Place | 231 | Jefferson | 40 12 43 N | 080 44 51 W |
| Jug Run | Stream | | Belmont | 40 06 39 N | 080 52 40 W |
| Jug Run | Stream | | Jefferson | 40 12 26 N | 080 45 02 W |
| Jug Run | Stream | | Knox | 40 21 20 N | 082 14 33 W |
| Jug Run | Stream | | Licking | 40 13 31 N | 082 11 17 W |
| Jug Run School (historical) | School | 281 | Knox | 40 15 23 N | 082 13 08 W |
| Jugs Corners | Populated Place | 433 | Morrow | 40 40 51 N | 082 38 44 W |
| Jugs School (historical) | School | 435 | Morrow | 40 40 50 N | 082 38 42 W |
| Julia (historical) | Populated Place | 364 | Geauga | 41 20 51 N | 081 15 45 W |
| Julia Post Office (historical) | Post Office | 363 | Geauga | 41 20 50 N | 081 15 44 W |
| Julian Cemetery | Cemetery | 319 | Fairfield | 39 33 49 N | 082 44 25 W |
| Julian Griggs Dam | Dam | 229 | Franklin | 40 00 56 N | 083 05 40 W |
| Julienne High School | School | 242 | Montgomery | 39 46 32 N | 084 12 17 W |
| Julion Cemetery | Cemetery | 270 | Auglaize | 40 33 22 N | 084 15 32 W |
| Jumbo | Populated Place | 332 | Hardin | 40 35 42 N | 083 45 29 W |
| Jumbo Post Office (historical) | Post Office | 325 | Hardin | 40 35 40 N | 083 46 05 W |
| Jump | Populated Place | 304 | Hardin | 40 36 57 N | 083 47 40 W |
| Jump Post Office (historical) | Post Office | 308 | Hardin | 40 37 00 N | 083 47 40 W |
| Jumping Run | Stream | | Champaign | 40 05 17 N | 083 32 49 W |
| Junction | Populated Place | 217 | Paulding | 41 11 35 N | 084 27 31 W |
| Junction Cemetery | Cemetery | 215 | Paulding | 41 11 16 N | 084 27 32 W |
| Junction City | Populated Place | 254 | Perry | 39 43 16 N | 082 17 56 W |
| Junction City Elementary School | School | 250 | Perry | 39 43 21 N | 082 18 15 W |
| Junction City Park | Park | 250 | Perry | 39 43 21 N | 082 18 26 W |
| Junction City Post Office | Post Office | 253 | Perry | 39 43 15 N | 082 17 55 W |
| Junction Post Office (historical) | Post Office | 217 | Paulding | 41 11 35 N | 084 27 30 W |
| Jungbluth Ditch | Canal | 193 | Lorain | 41 26 25 N | 082 04 51 W |
| Junior Bridge School (historical) | School | 161 | Scioto | 38 39 15 N | 082 48 06 W |
| Junior Furnace | Populated Place | 174 | Scioto | 38 37 23 N | 082 48 33 W |
| Junior Furnace Baptist Church | Church | 171 | Scioto | 38 37 22 N | 082 48 35 W |
| Junior Landing | Locale | 158 | Scioto | 38 37 24 N | 082 51 20 W |
| Juniper Chapel | Church | 302 | Vinton | 39 22 28 N | 082 20 02 W |
| Justice Cemetery | Cemetery | 216 | Hocking | 39 24 49 N | 082 36 34 W |
| Justice Hollow | Valley | | Lawrence | 38 31 51 N | 082 36 43 W |
| Justin F Coressel Stadium | Park | 217 | Defiance | 41 17 57 N | 084 21 12 W |
| Justus | Populated Place | 309 | Stark | 40 42 16 N | 081 34 44 W |
| Justus Evangelical United Brethren Church | Church | 305 | Stark | 40 42 21 N | 081 34 50 W |
| Justus Middle School | School | 305 | Stark | 40 42 14 N | 081 34 53 W |
| Justus Post Office (historical) | Post Office | 310 | Stark | 40 42 15 N | 081 34 44 W |
| Juterboch Farm Cemetery | Cemetery | 221 | Warren | 39 19 39 N | 084 14 58 W |
| K'burg Cemetery | Cemetery | 178 | Ottawa | 41 33 32 N | 082 50 47 W |
| Kachelmacher (historical) | Populated Place | 214 | Hocking | 39 32 11 N | 082 16 39 W |
| Kachelmacher Park | Park | 217 | Hocking | 39 32 02 N | 082 24 35 W |
| Kachelmacher Post Office (historical) | Post Office | 214 | Hocking | 39 32 10 N | 082 16 40 W |
| Kagy Cemetery | Cemetery | 247 | Seneca | 41 02 56 N | 083 10 02 W |
| Kagy Ditch | Canal | 283 | Seneca | 41 02 42 N | 082 58 35 W |
| Kahol Cemetery | Cemetery | 205 | Defiance | 41 16 44 N | 084 21 23 W |
| Kail School (historical) | School | 266 | Tuscarawas | 40 20 16 N | 081 32 29 W |
| Kain Run | Stream | | Clermont | 39 01 46 N | 084 04 48 W |
| Kain Run School (historical) | School | 237 | Clermont | 39 01 58 N | 084 05 14 W |
| Kaiser Foundation Hospital | Hospital | 254 | Cuyahoga | 41 24 15 N | 081 46 27 W |
| Kaiser Hollow | Valley | | Lawrence | 38 38 45 N | 082 37 45 W |
| Kale Creek | Stream | | Trumbull | 41 09 38 N | 080 58 21 W |
| Kalida | Populated Place | 221 | Putnam | 40 58 58 N | 084 11 58 W |
| Kalida Elementary School | School | 221 | Putnam | 40 59 07 N | 084 11 59 W |
| Kalida High School | School | 221 | Putnam | 40 59 00 N | 084 11 49 W |
| Kalida Post Office | Post Office | 221 | Putnam | 40 59 00 N | 084 11 60 W |
| Kallager Ditch | Canal | 192 | Lucas | 41 37 42 N | 083 41 20 W |
| Kamm Hall | Building | 243 | Cuyahoga | 41 22 06 N | 081 50 45 W |
| Kamms Corner | Populated Place | 230 | Cuyahoga | 41 27 01 N | 081 49 04 W |