| Code | Name | Region |
|---|---|---|
| USTWN | Twin City | GA |
| USTNI | Tunica | MS |
| USTKK | Tunkhannock | PA |
| USTUI | Tunnel City | WI |
| USXNI | Tunnel Hill | GA |
| USWTL | Tuntutuliak | AK |
| USTNK | Tununak | AK |
| USTL4 | Tuolumne | CA |
| USTUP | Tupelo | MS |
| USTP3 | Tupman | CA |
| USTP2 | Tupper Lake | NY |
| USTUQ | Turkey | NC |
| USTKR | Turkey | TX |
| USTLK | Turlock | CA |
| USTNM | Turner | ME |
| USTUR | Turner | MT |
| USYTU | Turner | OR |
| USM4U | Turners Falls | MA |
| USTUO | Turners Station | KY |
| USTUE | Turnersville | NJ |
| USTLC | Turtle Creek | PA |
| USTUC | Tucker | GA |
| USDDA | Tuckerman | AR |
| USTN5 | Tuckerton | NJ |
| USTUZ | Tucson | AZ |
| USTUS | Tucson International Apt | AZ |
| USTCC | Tucumcari | NM |
| USTJN | Tujunga | CA |
| USTUK | Tukwila | WA |
| USUQQ | Tulalip | WA |
| USTLR | Tulare | CA |
| USTLL | Tulelake | CA |
| USTIA | Tulia | TX |
| USTHA | Tullahoma | TN |
| USTLY | Tully | NY |
| USTTW | Tullytown | PA |
| USTUL | Tulsa | OK |
| USRVS | Tulsa | OR |
| USTLT | Tuluksak | AK |
| USTUW | Tumwater | WA |
| US7TU | Tunbridge | VT |
| USTCY | Troy | VT |
| USTYG | Troy Grove | IL |
| USTMS | Troy Mills | IA |
| USTKF | Truckee | CA |
| USM6I | Truesdale | MO |
| USTUA | Truman | MN |
| USTMN | Trumann | AR |
| UST9R | Trumansburg | NY |
| USTBV | Trumbauersville | PA |