| Code | Name | Region |
|---|---|---|
| USXHM | Lightfoot | VA |
| USQDU | Lexington | MO |
| USLXO | Lexington | MS |
| USLXG | Lexington | NC |
| USLXN | Lexington | NE |
| USLKQ | Lexington | OH |
| USXON | Lexington | OR |
| USLET | Lexington | SC |
| USLEL | Lexington | TN |
| USIXI | Lexington | TX |
| USLXH | Lexington | VA |
| USL7X | Lexington Park | MD |
| USLBZ | Libby | MT |
| USLBL | Liberal | KS |
| USZLY | Liberty | IA |
| USIBX | Liberty | IL |
| USLBK | Liberty | IN |
| USIYB | Liberty | KS |
| USLY2 | Liberty | KY |
| US9LI | Liberty | ME |
| USLHR | Liberty | MI |
| USLVQ | Lewiston | MI |
| USLVZ | Lewiston | NC |
| USLUT | Lewiston | NY |
| USLZO | Lewiston | UT |
| USL2T | Lewistown | IL |
| USLWT | Lewistown | MT |
| USL7W | Lewistown | PA |
| USLWW | Lewistown, Mifflin | PA |
| USLWI | Lewisville | AR |
| USV7L | Lewisville | ID |
| USLWZ | Lewisville | NC |
| USLJV | Lewisville | TX |
| US3LX | Lexa | AR |
| USQKV | Lexington | AL |
| USL2G | Lexington | GA |
| USLXT | Lexington | IL |
| USLEX | Lexington | KY |
| USLXI | Lexington | MA |
| USLXM | Lexington | MI |
| USKLL | Levelock | AK |
| USLE6 | Levels | WV |
| USVR4 | Leverett | MA |
| USLE4 | Levering | MI |
| USLEO | Levittown | NY |
| USLTT | Levittown | PA |
| USLWP | Lewes | DE |
| USL2W | Lewis | |
| USLEQ | Lewis Center | OH |
| USIRU | Lewis Run | PA |