| Code | Name | Region |
|---|---|---|
| USXJN | North Branch | NJ |
| USOWK | Norridgewock | ME |
| USOZS | Norris | IL |
| USNR9 | Norris | SC |
| USNIQ | Norris | TN |
| USUXQ | Norristown | PA |
| USNRR | North | NY |
| USNOR | North | SC |
| USNAA | North Abington | MA |
| USNA9 | North Adams | MA |
| USXJM | North Andover | MA |
| USNHS | North Anson | ME |
| USJRB | North Arab | AL |
| USNJT | North Arlington | NJ |
| USNTT | North Attleboro | MA |
| USNAU | North Augusta | SC |
| USNOA | North Aurora | IL |
| USNBY | North Babylon | NY |
| USNBH | North Baltimore | OH |
| US5NB | North Barrington | IL |
| USNBV | North Bay Shore | NY |
| USNDQ | Norden | CA |
| USNFF | Norfolk | CT |
| USNFJ | Norfolk | MA |
| USOFK | Norfolk | NE |
| USNFK | Norfolk | NY |
| USORF | Norfolk | VA |
| USOOJ | Norfork | AR |
| USNRL | Norlina | NC |
| USDMV | Norma | NJ |
| USNOM | Normal | IL |
| US4OR | Normalville | PA |
| USNMN | Norman | AR |
| USNI2 | Norman | IN |
| USOUN | Norman | OK |
| USNZM | Norman Park | GA |
| US5UN | Normandy | MO |
| USNXK | Normandy | TN |
| USNMG | Normangee | TX |
| USNFA | Norphlet | AR |
| USNRF | Norridge | IL |
| USNTX | Nocona | TX |
| USNOE | Noel | MO |
| USOLS | Nogales | AZ |
| USQNV | Nokesville | VA |
| USNQM | Nokomis | FL |
| USNLZ | Nolan | TX |
| USNVX | Nolanville | TX |
| USNZV | Nolensville | TN |
| USOME | Nome | AK |