| Trotwood, Ohio | Troubadour | Troubleshooting |
| Trout Lake Township, Michigan | Trout Valley, Illinois | Troutdale, Oregon |
| Trovo | Trowbridge Township, Michigan | Troxipide |
| Troy | Troy (film) | Troy Baker |
| Troy Daniels | Troy Grove, Illinois | Troy ounce |
| Troy Township, Michigan | Troy, Illinois | Troy, Kansas |
| Troy, Michigan | Troy, Missouri | Troy, Montana |
| Troy, Sauk County, Wisconsin | Troy, St. Croix County, Wisconsin | Troy, Tennessee |
| Troy, Texas | Troy, Vermont | Troy, Walworth County, Wisconsin |
| Troyca | Trstená | TRT |
| TRT6 | Truchtersheim | Trucial States |
| Truck | Truck Robinson | Truck scale |
| Truckton, Colorado | Trudeau Institute | True airspeed |
| True Crime :streets of LA | True Crime: New York City | True Cross |
| True Detective (TV series) | True Grit (1969 film) | True Grit (2010 film) |
| True Lies | True Path Party | True ribs |
| True self and false self | True Tears | True, Wisconsin |
| TrueCrypt | Truesdale, Iowa | Truesdale, Missouri |
| TruForm | Truman Capote | Truman Doctrine |
| Truman, Minnesota | Trumann, Arkansas | Trumansburg, New York |
| Trumbull, Nebraska | Trump International Hotel and Tower (Chicago) | Trump Taj Mahal |
| Trumpet | Trumpler 1 | Trumpler 16 |
| Trumpler 2 | Truncal obesity | Trunk (automobile) |
| Trunk to Cairo | Truro, Iowa | Truss arch bridge |
| Truss bridge | Trust (game show) | Trust (social sciences) |
| Trust management (managerial science) | Trust Territory of Somaliland | Trusted third party |
| Trusty Bell | Truth | Truth or Consequences, New Mexico |
| Truth serum | Truth value | Truvada |
| Truxton, Missouri | TRX2 | Trygve Haavelmo |
| Tryngites | Tryngites subruficollis | Trypanosoma |
| Trypanosoma brucei | Trypanosoma evansi | Trypanosomatida |
| Trypanosomatidae | Trypanosomatina | Trypsin |
| Trypsinogen | Tryptamine | Trypticase soy agar |
| Tryptophan | Trương Tấn Sang | TS Entertainment |
| Tsai Ing-wen | Tsakhiagiin Elbegdorj | Tsanko Tsvetanov |
| Tsar Bomba | Tscherskia | Tscherskia triton |
| TSD | Tseng Labs | Tsepo Masilela |
| Tshepiso Molwantwa | Tshepo Motlhabankwe | Tshering Dorji |
| Tsholola Tshinyama | TSI slant | Tsinghua University |
| Tsingy de Bemaraha Strict Nature Reserve | Tsiolkovsky mission | Tsiolkovsky rocket equation |
| Tskhinvali | TSMC | Tsotsi |
| Tsu (social network) | Tsubasa: Reservoir Chronicle | Tsuga |
| Tsuga canadensis | Tsuga caroliniana | Tsuga chinensis |
| Tsuga diversifolia | Tsuga dumosa | Tsuga forrestii |
| Tsuga heterophylla | Tsuga jeffreyi | Tsuga mertensiana |
| Tsuga sieboldii | Tsuga thuja | Tsunami |
| Tsundere | Tsuneo Imahori | Tsuneyasu Miyamoto |
| Tsung-Dao Lee | Tsutomu Hata | Tsuyoshi Kitazawa |
| Tswana language | Tswett | TT pistol |
| TT81 | TTL | TTS |
| Tu Chor Main Sipahi | TU Dresden | Tua Forsström |
| TuAF TFX | Tuğçe Kazaz | Tuba Büyüküstün |
| Tube and clamp scaffold | Tubeless tire | Tuber |
| Tuberaria | Tuberaria guttata | Tubercle |
| Tubercle (rib) | Tuberculosis | Tuberculosis cutis orificialis |
| Tuberculum impar | Tuberosity of the tibia | Tuberous receptor |
| Tubersent | Tubiflorae | Tubin, Iran |
| Tubipora musica | Tubular pinch effect | Tubulidentata |
| Tubulin | Tubulinea | Tuckahoe (village), New York |
| Tucker & Dale vs. Evil | Tuckerman, Arkansas | Tucumcari, New Mexico |
| Tudanca | Tudaran | Tudeh Bin |
| Tudeh Party of Iran | Tudor Arghezi | Tudor rose |
| TUE | Tufal | Tufted capuchin |
| Tugay Kerimoğlu | Tugboat | Tughra |
| Tughrul Tower | Tugtupite | Tuguegarao Airport |
| TUI | Tui na | TUIfly |
| Tuileries Palace | Tujerdi Rural District | Tukums |
| Tul Yek | Tulan | Tulare, South Dakota |
| Tularemia | Tularosa, New Mexico | Tulayha |
| Tulbaghia | Tulbaghia acutiloba | Tulbaghia aequinoctialis |
| Tulbaghia alliacea | Tulbaghia capensis | Tulbaghia leucantha |
| Tulbaghia montana | Tulbaghia transvaalensis | Tulbaghia violacea |
| Tulbaghieae | Tuleh Kola | Tulip |
| Tulip chair | Tulip mania | Tulip Revolution |
| Tulipa | Tulir | Tullahoma, Tennessee |
| Tullio Lanese | Tullio Levi-Civita | Tully (village), New York |
| Tulsidas | Tuluksak, Alaska | Tulun, Iran |
| Tumansky | Tumansky R-11 | Tumansky R-25 |
| Tumansky R-29 | Tumansky RD-9 | Tumblr |
| Tumblr.com | Tumelo Nhlapo | Tummal Inscription |
| Tumor | Tumor necrosis factor-alpha | Tumor progression |
| Tumour virus | Tumulus culture | Tumxuk Airport |
| TUN | TUN (توضيح) | Tuna, Iran |
| Tunable laser | Tunay Torun | Tunbridge, Vermont |
| Tuncay Şanlı | Tundra | Tuner (radio) |
| Tung Choi Street | Tungsten | Tungsten carbide |
| Tungsten dichloride dioxide | Tungsten disilicide | Tungsten(III) oxide |
| Tungsten(IV) oxide | Tungsten(IV) sulfide | Tungsten(IV) telluride |
| Tungsten(V) bromide | Tungsten(V) chloride | Tungsten(VI) oxytetrabromide |
| Tungsten(VI) oxytetrachloride | Tungsten(VI) oxytetrafluoride | Tunguska event |
| Tuni (footballer) | Tunic | Tunica intima |
| Tunica media | Tunica, Mississippi | Tunicata |
| Tunicate | Tuning fork | Tuninter Flight 1153 |
| Tunis | TUNIS | Tunis Dauphine |
| Tunisair | TunisAir Express | Tunisavia |
| Tunis–Carthage International Airport | Tunisia | Tunisia Campaign |
| Tunisia Polytechnic School | Tunisian Air Force | Tunisian Civil Aviation and Airports Authority |
| Tunisian dinar | Tunisian franc | Tunisian Internet Agency |
| Tunisian passport | Tunisian Pirate Party | Tunisian Railways |
| Tunisian Republic | Tunisian rial | Tunisian UAVs |
