Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Narrows Run Church | Church | 201 | Monroe | 39 37 09 N | 080 56 38 W |
| Narva | Populated Place | 368 | Harrison | 40 19 02 N | 080 57 43 W |
| Nasby | Populated Place | 190 | Lucas | 41 37 49 N | 083 36 41 W |
| Nash Corners | Locale | 211 | Pickaway | 39 30 32 N | 082 58 21 W |
| Nash Hill | Summit | 353 | Portage | 41 09 12 N | 081 20 14 W |
| Nashport | Populated Place | 252 | Muskingum | 40 04 14 N | 082 10 33 W |
| Nashport Community Church | Church | 244 | Muskingum | 40 04 23 N | 082 10 44 W |
| Nashport Dike | Dam | 244 | Muskingum | 40 04 30 N | 082 09 23 W |
| Nashport Elementary School | School | 272 | Muskingum | 40 01 48 N | 082 06 22 W |
| Nashport Post Office | Post Office | 248 | Muskingum | 40 04 15 N | 082 10 35 W |
| Nashport Station (historical) | Locale | 242 | Muskingum | 40 02 49 N | 082 09 18 W |
| Nashville | Populated Place | 332 | Darke | 40 05 31 N | 084 44 40 W |
| Nashville | Populated Place | 373 | Holmes | 40 35 46 N | 082 06 44 W |
| Nashville | Populated Place | 271 | Miami | 39 57 55 N | 084 16 47 W |
| Nashville Cemetery | Cemetery | 333 | Darke | 40 05 32 N | 084 44 34 W |
| Nashville Elementary School | School | 367 | Holmes | 40 35 44 N | 082 06 28 W |
| Nashville Methodist Cemetery | Cemetery | 366 | Holmes | 40 35 46 N | 082 06 57 W |
| Nashville Methodist Church | Church | 371 | Holmes | 40 35 48 N | 082 06 57 W |
| Nashville Post Office | Post Office | 373 | Holmes | 40 35 45 N | 082 06 45 W |
| Nashville United Methodist Church | Church | 333 | Darke | 40 05 28 N | 084 44 41 W |
| Nason School (historical) | School | 308 | Darke | 40 17 03 N | 084 28 58 W |
| Nassau Astronomical Station | Building | 378 | Lake | 41 35 04 N | 081 04 42 W |
| Nast-Trinity United Methodist Church | Church | 166 | Hamilton | 39 06 35 N | 084 30 60 W |
| Nathan Hale Elementary School | School | 188 | Lucas | 41 39 25 N | 083 35 21 W |
| Nathan Hale Junior High School | School | 267 | Cuyahoga | 41 27 37 N | 081 36 28 W |
| Nathan Hale Park | Park | 265 | Cuyahoga | 41 22 20 N | 081 46 27 W |
| Nathanial Hawthorne Elementary School | School | 230 | Cuyahoga | 41 27 24 N | 081 46 45 W |
| Nathaniel R Jones Federal Building and United States Courthouse | Building | 263 | Mahoning | 41 06 02 N | 080 38 54 W |
| Nation Chapel Cemetery | Cemetery | 350 | Clark | 40 00 14 N | 083 31 57 W |
| Nation School (historical) | School | 302 | Butler | 39 32 53 N | 084 43 19 W |