| Code | Name | Region |
|---|---|---|
| USXWX | Loda | IL |
| USLVP | Liverpool | PA |
| USL8V | Liverpool | TX |
| USLVT | Livingston | AL |
| USLGS | Livingston | CA |
| USLVO | Livingston | LA |
| USXHX | Livingston | MI |
| USLVM | Livingston | MT |
| USLVG | Livingston | NJ |
| USLVY | Livingston | NY |
| USLYV | Livingston | TN |
| USLIX | Livingston | TX |
| USLM4 | Livingston Manor | NY |
| USLVI | Livonia | MI |
| USV8I | Livonia | NY |
| USLZT | Lizton | IN |
| USLXQ | Llano | CA |
| USLL2 | Llano | TX |
| USLQP | Loachapoka | AL |
| USLT4 | Loan Tree | CO |
| USLHV | Lock Haven | PA |
| USL2S | Little Suamico | WI |
| US5LK | Little Torch Key | FL |
| USL8Y | Little Valley | NY |
| USLIF | Littlefield | TX |
| USYLR | Littlerock | CA |
| USTLW | Littlestown | PA |
| USLTO | Littleton | CO |
| USLTN | Littleton | MA |
| USLT9 | Littleton | NC |
| USLTL | Littleton | NH |
| USIIL | Littletown | PA |
| USLO2 | Live Oak | CA |
| USLOQ | Live Oak | FL |
| USJLI | Lively | VA |
| USLIV | Livengood | AK |
| USLVK | Livermore | CA |
| USKKY | Livermore | KY |
| USL4V | Livermore | ME |
| USLVF | Livermore Falls | ME |
| USLPX | Liverpool | NY |
| USTMT | Little Compton | RI |
| USL2D | Little Deer Isle | ME |
| USL7E | Little Elm | TX |
| USLE7 | Little Elm | TX |
| USLFS | Little Falls | MN |
| USLFJ | Little Falls | NJ |
| USLLF | Little Falls | NY |
| USLTF | Little Ferry | NJ |
| USLTG | Little Genesee | NY |