| Code | Name | Region |
|---|---|---|
| USTOG | Togiak Village | AK |
| USTKJ | Tok | AK |
| USTKI | Tokeen | AK |
| USKIP | Tokio | TX |
| USOOK | Toksook Bay | AK |
| USTXS | Tolar | TX |
| USTED | Toleda | IA |
| USI9W | Toledo | IA |
| USTQD | Toledo | IL |
| USTOL | Toledo | OH |
| USTGA | Tioga | LA |
| USVEX | Tioga | ND |
| USTIG | Tioga | PA |
| USNS4 | Tioga | TX |
| USTQT | Tionesta | PA |
| USUZE | Tipp City | OH |
| USTPQ | Tippecanoe | IN |
| USTPT | Tipton | CA |
| USTT2 | Tipton | IA |
| USTII | Tipton | IN |
| USTP7 | Tipton | KS |
| USTP5 | Tipton | MO |
| USTTP | Tipton | PA |
| USTPV | Tiptonville | TN |
| USTY3 | Tisbury | MA |
| USTHJ | Tishomingo | MS |
| USTSI | Tishomingo | OK |
| USTKW | Tiskilwa | IL |
| USTIX | Titusville | FL |
| USTIT | Titusville | PA |
| USTD8 | Tilden | TX |
| USTLM | Tillamook | OR |
| USZTR | Tillar | AR |
| USIAT | Tillatoba | MS |
| USTIQ | Tillery | NC |
| USTL8 | Tillson | NY |
| USTT3 | Tilton | IL |
| USTL2 | Tilton | NH |
| USIVC | Tiltonsville | OH |
| USTL3 | Timber Lake | SD |
| USTLE | Timberlake | NC |
| USTMB | Timberville | VA |
| USXTE | Timmonsville | SC |
| USTIM | Timnath | CO |
| USTUM | Timonium | MD |
| USTT5 | Timpson | TX |
| USTNC | Tin City | AK |
| USYTB | Tinker Air Force Base | OK |
| USTNL | Tinley Park | IL |
| USTIN | Tinton Falls | NJ |