| Code | Name | Region |
|---|---|---|
| USNJA | New Albany | PA |
| USN4W | New Albin | IA |
| USNA3 | New Alexandria | PA |
| USAU4 | New Auburn | MN |
| USNUB | New Auburn | WI |
| USN7G | New Augusta | IN |
| USNA2 | New Augusta | MS |
| USNDI | New Baden | IL |
| USNBT | New Baltimore | MI |
| USNB9 | New Baltimore | PA |
| USNB8 | New Baltimore | VA |
| USEFC | New Bedford | IL |
| USNBD | New Bedford | MA |
| US8LL | New Berlin | IL |
| USNBR | New Berlin | NY |
| USNUY | New Berlin | PA |
| USNBB | New Berlin | WI |
| USEWN | New Bern | NC |
| USNPC | Neptune City | NJ |
| USOZX | Nerstrand | MN |
| USNXZ | Nesbit | MS |
| USNES | Nesconset | NY |
| USNE3 | Nescopeck | PA |
| USNSN | Neshanic Station | NJ |
| USNZT | Nesmith | SC |
| USN2M | Nespelem | WA |
| USNSQ | Nesquehoning | PA |
| USNCJ | Ness City | KS |
| USNEQ | Netcong | NJ |
| USNTO | Nettleton | MS |
| USNVN | Nevada | IA |
| USNVD | Nevada | MO |
| USNVT | Nevada | TX |
| USNFC | Nevada City | CA |
| USNVI | Neville Island | PA |
| USZVI | Nevis | MN |
| USNWA | New Albany | IN |
| USNAM | New Albany | MS |
| USN4L | Nellysford | VA |
| USQSO | Nelson | CA |
| USNON | Nelson | GA |
| USNZL | Nelson | NE |
| USN8L | Nelson | NH |
| USQNL | Nelson | WI |
| USNLG | Nelson Lagoon | AK |
| USNOQ | Nelsonia | VA |
| USNNV | Nelsonville | OH |
| USNSJ | Nelsonville, Portage | WI |
| USNKM | Nemo | SD |
| USENN | Nenana | AK |