| Code | Name | Region |
|---|---|---|
| USTTD | Troutdale | OR |
| UST5N | Trenton | ME |
| USXNG | Trenton | MI |
| USTRX | Trenton | MO |
| USTNZ | Trenton | NC |
| USTTN | Trenton | NJ |
| USTNX | Trenton | OH |
| USXTO | Trenton | SC |
| USTRN | Trenton | TN |
| UST6N | Trenton | TX |
| USTR5 | Trenton | UT |
| US8YI | Tres Pinos | CA |
| US8TR | Trevett | ME |
| USZJB | Trevilians | VA |
| USTVO | Trevor | WI |
| USTVR | Trevorton | PA |
| USTVS | Trevose | PA |
| USTDP | Triadelphia | WV |
| USTNV | Triangle | VA |
| USYTC | Tri-cities | WA |
| USXNJ | Travelers Rest | SC |
| USTVY | Traver | CA |
| USTVC | Traverse City | MI |
| USVFB | Travis Air Force Base | CA |
| USEUA | Treasure Island | FL |
| USTSU | Treasure Island/los Angeles | CA |
| USTRP | Tree Point | AK |
| USTG8 | Trego | MT |
| USTR9 | Tremont | IL |
| USTMX | Tremont | MS |
| USTOX | Tremont | PA |
| USTRT | Tremonton | UT |
| UST2R | Trempealeau | WI |
| USTZE | Trent | SD |
| USTNR | Trenton | CA |
| USTOE | Trenton | FL |
| USZJO | Trenton | GA |
| USTEQ | Trenton | IL |
| USTXE | Trenton | KY |
| USYTR | Trenton | LA |
| USTO7 | Tower Lakes | IL |
| USTC4 | Town And Country | MO |
| USTC2 | Town Creek | AL |
| USTXW | Townsend | DE |
| USTQW | Townsend | GA |
| USTWB | Townsend | MA |
| USTSD | Townshend | VT |
| USWP2 | Township Of Woolwich | NJ |
| USTWS | Towson | MD |
| USTC9 | Trabuco Canyon | CA |