| Code | Name | Region |
|---|---|---|
| USTM2 | Thomas | WV |
| USTH9 | Thomasboro | IL |
| USTHO | Thomaston | CT |
| USTHS | Thomaston | GA |
| USTSK | Thomaston | ME |
| USTVM | Thomasville | AL |
| USTVI | Thomasville | GA |
| USTVE | Thomasville | NC |
| USTMV | Thomasville | PA |
| US3TH | Thompson | CT |
| USTXA | Texas | MD |
| USTXT | Texas City | TX |
| UST2X | Texhoma | OK |
| USTX5 | Texico | IL |
| USTHK | Thacker | WV |
| USQVL | Thackerville | OK |
| USZTH | Thatcher | AR |
| USYUZ | Thatcher | AZ |
| USTAY | Thayer | KS |
| USTXY | Thayer | MO |
| USTY8 | Thayne | WY |
| USCY2 | The Colony | TX |
| USDLS | The Dalles | OR |
| USTH7 | The Hills | TX |
| USTP9 | The Plains | VA |
| USRKG | The Rock | GA |
| USVGZ | The Villages | FL |
| USTHW | The Woodlands | TX |
| USTDF | Thedford | NE |
| USOJL | Thenard | CA |
| USVVC | Terra Bella | CA |
| USZ2T | Terre Haute | IL |
| USHUF | Terre Haute | IN |
| USTRD | Terre Hill | PA |
| USNJQ | Terrebonne | OR |
| USTEE | Terrell | TN |
| USTRL | Terrell | TX |
| USTOM | Terreton | ID |
| USQTY | Terry | MS |
| USTYW | Terrytown | LA |
| USTZX | Terryville | CT |
| USQ6T | Tesuque | NM |
| USTEB | Teterboro | NJ |
| USTEH | Tetlin | AK |
| USTET | Teton Village | WY |
| USTTX | Teutopolis | IL |
| USTEW | Tewksbury | MA |
| USTW9 | Tewksbury | NJ |
| USTXK | Texarkana | AR |
| USTEX | Texarkana | TX |