| Code | Name | Region |
|---|---|---|
| USLGL | Langley | WA |
| US6YP | Langley Park | MD |
| USXIB | Langsville | OH |
| USLME | Lanham | MD |
| USLIR | Lanier | GA |
| USLN9 | Lannon | WI |
| USLN8 | Lanoka Harbor | NJ |
| USLDA | Lansdale | PA |
| USLDW | Lansdowne | MD |
| USLNC | Lancaster | OH |
| USLNS | Lancaster | PA |
| USLNW | Lancaster | SC |
| USLTX | Lancaster | TX |
| USZLI | Lancaster | WI |
| USEQK | Lance Creek | WY |
| USLLS | Land O' Lakes | WI |
| USKAJ | Land O'lakes | FL |
| USLDG | Landenberg | PA |
| USLND | Lander | WY |
| USJLJ | Landgrove | VT |
| USLZV | Landing | NJ |
| USLFD | Landis | NC |
| USLDV | Landisville | NJ |
| USLNL | Landisville | PA |
| USLNO | Lando | SC |
| USLDR | Landover | MD |
| USLDU | Landrum | SC |
| USYLQ | Lane | SC |
| USTY9 | Lane City | TX |
| USLMF | Lamar | SC |
| USLML | Lambertville | MI |
| USLMV | Lambertville | NJ |
| USXHG | Lamesa | TX |
| USLQM | Lamont | CA |
| USLM2 | Lamont | MS |
| USLMD | Lamont | NY |
| USLZM | Lamoure | ND |
| USLAZ | Lampasas | TX |
| USKPE | Lampe | MO |
| USLMP | Lampeter | PA |
| USLNY | Lanai City | HI |
| USNAR | Lanark | IL |
| USIEN | Lancashire | DE |
| USWJF | Lancaster | CA |
| USLC5 | Lancaster | KY |
| USLCS | Lancaster | MA |
| USLZC | Lancaster | MN |
| USTR6 | Lancaster | NH |
| USLAC | Lancaster | NY |
| USLVA | Lakeville | MN |