| Code | Name | Region |
|---|---|---|
| USNDA | Neodesha | KS |
| USNE2 | Neoga | IL |
| USEOS | Neosho | MO |
| USNE9 | Neosho | MS |
| USNPH | Nephi | UT |
| USN8P | Neponset | IL |
| US9NT | Neptune | NJ |
| USNPB | Neptune Beach | FL |
| USNBK | Nebraska City | NE |
| USNEJ | Necedah | WI |
| USNEC | Neche | ND |
| USKHS | Neches | TX |
| USNDD | Nederland | CO |
| USNDX | Nederland | TX |
| US8DE | Needham | AL |
| USNEE | Needham | MA |
| USNDM | Needham Heights | MA |
| USEED | Needles | CA |
| USNZQ | Needmore | PA |
| USNVE | Needville | TX |
| USNMO | Neelys | MO |
| USUXK | Neenah | WI |
| USNB4 | Neets Bay | AK |
| USNEG | Negley | OH |
| USIEW | Neillsville | WI |
| USKOE | Nekoosa | WI |
| US4NE | Neligh | NE |
| USNS8 | Nellis Air Force Base | NV |
| USNC2 | National City | MI |
| USNTL | National Gardens | FL |
| USTJA | Natoma | KS |
| USNRM | Natrium | WV |
| USNAH | Natrona Heights | PA |
| USNAT | Natural Bridge | NY |
| USNLH | Natural Bridge | VA |
| USHPC | Natural Bridge Station | VA |
| USNGK | Naugatuck | CT |
| USNKI | Naukiti | AK |
| USNAV | Nauvoo | AL |
| USNV7 | Nauvoo | IL |
| USNVA | Navarre | FL |
| USNVF | Navarre | OH |
| USVSA | Navasota | TX |
| USNIJ | Nawiliwili | HI |
| USNAZ | Nazareth | PA |
| USNEB | Neah Bay | WA |
| US7NO | Nebo | KY |
| USEBO | Nebo, Mcdowell | NC |
| USNSH | Nashville | GA |
| USNXV | Nashville | IL |