Towns
| State | City/Town | Town Title |
|---|---|---|
| Illinois | New Memphis | New Memphis, IL |
| Illinois | New Salem | New Salem, IL |
| Illinois | New Windsor | New Windsor, IL |
| Illinois | Newark | Newark, IL |
| Illinois | Newman | Newman, IL |
| Illinois | Newton | Newton, IL |
| Illinois | Niantic | Niantic, IL |
| Illinois | Niles | Niles, IL |
| Illinois | Nilwood | Nilwood, IL |
| Illinois | Niota | Niota, IL |
| Illinois | Noble | Noble, IL |
| Illinois | Nokomis | Nokomis, IL |
| Illinois | Nora | Nora, IL |
| Illinois | Normal | Normal, IL |
| Illinois | Norris | Norris, IL |
| Illinois | Norris City | Norris City, IL |
| Illinois | North Aurora | North Aurora, IL |
| Illinois | North Brook | North Brook, IL |
| Illinois | North Chicago | North Chicago, IL |
| Illinois | North Henderson | North Henderson, IL |
| Illinois | Northbrook | Northbrook, IL |
| Illinois | O Conee | O Conee, IL |
| Illinois | O Dell | O Dell, IL |
| Illinois | O Fallon | O Fallon, IL |
| Illinois | O'fallon | O'fallon, IL |