| Code | Name | Region |
|---|---|---|
| USLHK | Little Hocking | OH |
| USLKF | Little Lake | CA |
| USLMX | Little Mountain | SC |
| USWLN | Little Naukati | AK |
| USLYK | Little Neck/queens/new York | NY |
| USLPW | Little Port Walter | AK |
| USRWJ | Little River | CA |
| USLR3 | Little River | SC |
| USLR6 | Little River | TX |
| USLIT | Little Rock | AR |
| USEIR | Little Silver | NJ |
| USLJB | Lisbon | NH |
| USIBN | Lisbon | NY |
| USLZI | Lisbon | OH |
| USLF3 | Lisbon Falls | ME |
| USLJI | Lisbon, Ransom | ND |
| USLSA | Lisle | IL |
| USLIS | Listerhill | AL |
| USYCF | Litchfield | CT |
| USXHZ | Litchfield | IL |
| USL8F | Litchfield | ME |
| USLTD | Litchfield | MI |
| USLHF | Litchfield | MN |
| USL9T | Litchfield | NH |
| USIEL | Litchfield Park | AZ |
| USZLH | Lithia | FL |
| USLHS | Lithia Springs | GA |
| USLIO | Lithonia | GA |
| USLTI | Lititz | PA |
| USLCD | Little Canada | MN |
| USLTC | Little Chute | WI |
| USLQX | Linndale | OH |
| USLN5 | Linnton | OR |
| USLLB | Lino Lakes | MN |
| USLNM | Linthicum | MD |
| USLTU | Linthicum Heights | MD |
| USJIT | Linton | IN |
| USLN2 | Linton | ND |
| USLZE | Linville | VA |
| USLW4 | Linwood | KS |
| USU6D | Linwood | MA |
| USYLW | Linwood | MI |
| USLNZ | Linwood | NC |
| USIWC | Linwood | NJ |
| USLD4 | Linwood | NY |
| USLIW | Linwood | PA |
| USLIN | Lionville | PA |
| USL7P | Lipscomb | AL |
| US9LS | Lisbon | CT |
| USLZB | Lisbon | IA |