| Code | Name | Region |
|---|---|---|
| USLB2 | Lubec | ME |
| USUCM | Lucama | NC |
| USPOY | Lovell-powell Apt | WY |
| USLOL | Lovelock | NV |
| USQLI | Loves Park | IL |
| USVTT | Lovettsville | VA |
| USL3V | Loving | NM |
| USLV6 | Lovingston | VA |
| USIOI | Lovington | IL |
| USLOJ | Lovington | NM |
| USTOZ | Low Moor | VA |
| US5LD | Lowden | IA |
| US7SD | Lowden | WA |
| USLWY | Lowell | AR |
| USLOE | Lowell | MA |
| USLPB | Lowell | MI |
| USOWE | Lowell | NC |
| USXLW | Lowell | OH |
| USLW6 | Lowell | OR |
| US6WL | Lowell | VT |
| USLJW | Lowell | WI |
| USLWQ | Lowell, Lake | IN |
| USLUA | Louisiana | MO |
| USLO8 | Louisiana Offshore Oil Port (loop) | LA |
| US7LV | Louisville | AL |
| USLUE | Louisville | CO |
| USLUY | Louisville | GA |
| USZF8 | Louisville | IL |
| USL5V | Louisville | KS |
| USLUI | Louisville | KY |
| USLMS | Louisville | MS |
| USL3S | Louisville | NE |
| USLUV | Louisville | OH |
| USLOS | Louisville | TN |
| USLC2 | Loup City | NE |
| USL9Y | Love Valley | NC |
| USLVJ | Lovejoy | GA |
| USLLI | Lovelady | TX |
| USLOV | Loveland | CO |
| USXHT | Loveland | OH |
| USVLJ | Lovell | ME |
| USLLV | Lovell | WY |
| USOVS | Los Olivos | CA |
| USOS9 | Los Osos | CA |
| USLHB | Lost Harbor | AK |
| USTSO | Lost Hills | CA |
| USLSR | Lost River | AK |
| USUZT | Lostant | IL |
| USLHX | Lothian | MD |
| USLQT | Lott | TX |