| Code | Name | Region |
|---|---|---|
| USLL8 | Lincoln | MO |
| USIQN | Lincoln | MT |
| USLNK | Lincoln | NE |
| USNH5 | Lincoln | NH |
| USLCN | Lincoln | RI |
| USLI5 | Lincoln | WA |
| USLCE | Lincoln Center | ME |
| USYOC | Lincoln City | OR |
| USLIP | Lincoln Park | MI |
| USLPJ | Lincoln Park | NJ |
| USLPD | Lincoln Park, Chicago | IL |
| USL2P | Lighthouse Point | FL |
| US5LM | Lignum | VA |
| USLGI | Ligonier | IN |
| USLIG | Ligonier | PA |
| USLIU | Lihue (kauai) | HI |
| USLLG | Lilburn | GA |
| USLV4 | Lilesville | NC |
| USIXA | Lillian | AL |
| USLLL | Lillington | NC |
| USLL5 | Lilliwaup | WA |
| USLY9 | Lilly | GA |
| USLJM | Lima | NY |
| USLIA | Lima | OH |
| US7IM | Lima | PA |
| USL5I | Lime Springs | IA |
| USLVD | Lime Village | AK |
| USIJQ | Limerick | ME |
| USLMK | Limerick | PA |
| USLIZ | Limestone | ME |
| USLT7 | Limestone | TN |
| USLIB | Liberty | MO |
| US7IB | Liberty | MS |
| USLBI | Liberty | NC |
| USLJY | Liberty | NY |
| USLHP | Liberty | OH |
| USPL5 | Liberty | PA |
| USLBY | Liberty | SC |
| USLBX | Liberty | TX |
| USLH8 | Liberty Hill | TX |
| USLH3 | Liberty Hill, Milam | TX |
| USLTY | Liberty Hill, Williamson | TN |
| USLLK | Liberty Lake | WA |
| USL8T | Liberty Township | OH |
| USIBY | Liberty, De Kalb | TN |
| US3TW | Libertytown | MD |
| US5LV | Libertyville | IA |
| USLBV | Libertyville | IL |
| USLK6 | Licking | MO |
| USLOB | Lido Beach | NY |