| Code | Name | Region |
|---|---|---|
| USLBR | Lewisberry | PA |
| USLG7 | Lewisburg | KY |
| USLBU | Lewisburg | OH |
| USLFQ | Lewisburg | PA |
| USLBG | Lewisburg | TN |
| USLWB | Lewisburg | WV |
| USLWD | Lewisport | KY |
| USXWS | Lewiston | CA |
| USLWS | Lewiston | ID |
| USQLW | Lewiston | ME |
| USQLO | Leonia | NJ |
| USXTI | Leoti | KS |
| USLR2 | Leroy | AL |
| USEUY | Leroy | ND |
| USLGM | Lesage | WV |
| USLSQ | Leslie | GA |
| USLS5 | Leslie | MI |
| UST8S | Lester | IA |
| USLEZ | Lester | PA |
| USZVR | Lester | WV |
| USLSP | Lester Prairie | MN |
| USLZS | Lesterville | SD |
| USJZT | Letart | WV |
| USLC8 | Letcher | SD |
| USLE8 | Letha | ID |
| USLHT | Letohatchee | AL |
| USEU3 | Leucadia | CA |
| USLV8 | Levan | UT |
| US9VT | Levant | ME |
| USLLZ | Levelland | TX |
| USLER | Lenoir | NC |
| USLZZ | Lenoir City | TN |
| USLR7 | Lenora | KS |
| USLH6 | Lenorah | TX |
| USYLX | Lenox | IA |
| USLXK | Lenox | IL |
| USLNX | Lenox | MA |
| USLXD | Lenox Dale | MA |
| USIN7 | Leo-cedarville | IN |
| USL9A | Leola | AR |
| USLLA | Leola | PA |
| USLM3 | Leoma | TN |
| USLMR | Leominster | MA |
| USVXL | Leon Valley | TX |
| USJND | Leonard | MI |
| USENZ | Leonard | ND |
| US587 | Leonard | TX |
| USDOJ | Leonardo | NJ |
| USLTW | Leonardtown | MD |
| USLE9 | Leonardville | KS |