word | | Nationality |
| adjective | Tokelau | noun: Tokelauan(s) adjective: Tokelauan |
| adjective | Tonga | noun: Tongan(s) adjective: Tongan |
| adjective | Trinidad and Tobago | noun: Trinidadian(s), Tobagonian(s) adjective: Trinidadian, Tobagonian |
| adjective | Tunisia | noun: Tunisian(s) adjective: Tunisian |
| adjective | Turkey | noun: Turk(s) adjective: Turkish |
| adjective | Turkmenistan | noun: Turkmen(s) adjective: Turkmen |
| adjective | Turks and Caicos Islands | noun: none adjective: none |
| adjective | Tuvalu | noun: Tuvaluan(s) adjective: Tuvaluan |
| adjective | Uganda | noun: Ugandan(s) adjective: Ugandan |
| adjective | Ukraine | noun: Ukrainian(s) adjective: Ukrainian |
| adjective | United Arab Emirates | noun: Emirati(s) adjective: Emirati |
| adjective | United Kingdom | noun: Briton(s), British (collective plural) adjective: British |
| adjective | United States | noun: American(s) adjective: American |
| adjective | Uruguay | noun: Uruguayan(s) adjective: Uruguayan |
| adjective | Uzbekistan | noun: Uzbekistani adjective: Uzbekistani |
| adjective | Vanuatu | noun: Ni-Vanuatu (singular and plural) adjective: Ni-Vanuatu |
| adjective | Venezuela | noun: Venezuelan(s) adjective: Venezuelan |