word | | Nationality |
| Taiwan | Taiwan | noun: Taiwan (singular and plural) note: example - he or she is from Taiwan; they are from Taiwan adjective: Taiwan |
| Tajikistani | Tajikistan | noun: Tajikistani(s) adjective: Tajikistani |
| Tanzanian | Tanzania | noun: Tanzanian(s) adjective: Tanzanian |
| term | Kosovo | noun: Kosovar (Albanian), Kosovac (Serbian) adjective: Kosovar (Albanian), Kosovski (Serbian) note: Kosovan, a neutral term, is sometimes also used as a noun or adjective |
| Thai | Thailand | noun: Thai (singular and plural) adjective: Thai |
| Timorese | Timor-Leste | noun: Timorese adjective: Timorese |
| Tobagonian | Trinidad and Tobago | noun: Trinidadian(s), Tobagonian(s) adjective: Trinidadian, Tobagonian |
| Togolese | Togo | noun: Togolese (singular and plural) adjective: Togolese |
| Tokelauan | Tokelau | noun: Tokelauan(s) adjective: Tokelauan |
| Tomean | Sao Tome and Principe | noun: Sao Tomean(s) adjective: Sao Tomean |
| Tongan | Tonga | noun: Tongan(s) adjective: Tongan |
| Trinidadian | Trinidad and Tobago | noun: Trinidadian(s), Tobagonian(s) adjective: Trinidadian, Tobagonian |
| Tunisian | Tunisia | noun: Tunisian(s) adjective: Tunisian |
| Turk | Turkey | noun: Turk(s) adjective: Turkish |
| Turkish | Turkey | noun: Turk(s) adjective: Turkish |
| Turkmen | Turkmenistan | noun: Turkmen(s) adjective: Turkmen |