| Code | Name | Region |
|---|---|---|
| USLZY | Lyons | OR |
| USLXS | Lyons | SD |
| US8HC | Lynch | KY |
| USLYC | Lynchburg | SC |
| USLYX | Lynchburg | TN |
| USLYH | Lynchburg | VA |
| USLB6 | Lyndeborough | NH |
| USLYN | Lynden | WA |
| USLDT | Lyndhurst | NJ |
| USQYN | Lyndhurst | OH |
| USYHU | Lyndhurst | VA |
| USYDN | Lyndon | KS |
| USJYN | Lyndon | KY |
| US7LY | Lyndon | VT |
| USYND | Lyndon Station | WI |
| USNYK | Lyndonville | NY |
| USLLX | Lyndonville | VT |
| USLYA | Lynn | AL |
| USL2N | Lynn | AR |
| USLYI | Lynn | IN |
| USLZN | Lynn | MA |
| USZNN | Lynn | NC |
| USUTH | Luthersville | GA |
| USLHE | Lutherville-timonium | MD |
| USLU6 | Lutsen | MN |
| USLL4 | Luttrell, Union | TN |
| USLYZ | Lutts | TN |
| USLTZ | Lutz | FL |
| USLZW | Luverne | AL |
| USUVN | Luverne | MN |
| USXR9 | Luxemburg | WI |
| USUZR | Luzerne | PA |
| USL7Y | Lyden | NM |
| USLYR | Lyerly | GA |
| USYFR | Lyford | TX |
| USYKE | Lykens | PA |
| US3WA | Lyle | WA |
| USQLY | Lyles | TN |
| USUQH | Lyman | SC |
| USLYE | Lyme | CT |
| USLMQ | Lyme | NH |
| USLYB | Lynbrook | NY |
| USLUB | Lumber Bridge | NC |
| USQUQ | Lumber City | GA |
| USLBS | Lumberton | MS |
| USLBT | Lumberton | NC |
| USLUM | Lumberton | NJ |
| USLMB | Lumberton | TX |
| USLKN | Lumpkin | GA |
| USLUG | Lunenburg | MA |