| Nimishillen Township, OH (Township) |
| Nimmons, AR (Town) |
| Nimrod, MN (City) |
| Ninety Six, SC (Town) |
| Nineveh, IN (Township) |
| Nininger, MN (Township) |
| Ninnekah, OK (Town) |
| Ninnescah, KS (Township) |
| Ninnescah, KS (Township) |
| Ninnescah, KS (Township) |
| Ninnescah, KS (Township) |
| Niobrara, NE (Village) |
| Niobrara, NE (Township) |
| Niobrara County, WY (County) |
| Niota, TN (City) |
