| Code | Name | Region |
|---|---|---|
| USEP2 | Elka Park | NY |
| USQEK | Elkader | IA |
| USEKH | Elkhart | IA |
| USEKJ | Elkhart | IL |
| USEKI | Elkhart | IN |
| USEHR | Elkhart | KS |
| USEKF | Elkhart | TX |
| USEKK | Elkhart Lake | WI |
| USEKR | Elkhorn | NE |
| USELH | Elkhorn | WI |
| USEIN | Elkin | NC |
| USEKN | Elkins | WV |
| USEIK | Elkins Park | PA |
| USELQ | Elkland | PA |
| USZEM | Elkmont | AL |
| US3KO | Elko | GA |
| USEKO | Elko | NV |
| USE5T | Elko New Market | MN |
| USEKD | Elkridge | MD |
| USYEK | Elkton | FL |
| USEZ7 | Elizabethtown | IL |
| US4EI | Elizabethtown | IN |
| USEKX | Elizabethtown | KY |
| USEZW | Elizabethtown | NC |
| USEBW | Elizabethtown | NY |
| USEZT | Elizabethtown | PA |
| USEIZ | Elizabethville | PA |
| USEZ2 | Elizaville | NY |
| USKKN | Elk | CA |
| USELK | Elk City | OK |
| USEYJ | Elk Creek | CA |
| USEGK | Elk Grove | CA |
| USEVI | Elk Grove Village | IL |
| USE7H | Elk Horn | IA |
| USE3K | Elk Horn | KY |
| USEYX | Elk Mound | WI |
| USKRK | Elk Park | NC |
| USE2P | Elk Point | SD |
| USLR5 | Elk Rapids | MI |
| USER2 | Elk River | MN |
| USEJF | Elfin Forest | CA |
| USERD | Elfrida | AZ |
| USEGN | Elgin | IL |
| USJGI | Elgin | MN |
| USEGE | Elgin | SC |
| USZEG | Elgin | TX |
| USEI3 | Elida | NM |
| USELX | Elida | OH |
| USELI | Elim | AK |
| USET5 | Eliot | MA |