The World: Population - Age 15-19 (2018) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 25. | Thailand | 4,355,655 | 2018 | |
| 177. | The Bahamas | 25,447 | 2018 | |
| 138. | The Gambia | 219,566 | 2018 | |
| 83. | Togo | 829,559 | 2018 | |
| 189. | Tonga | 11,150 | 2018 | |
| 162. | Trinidad and Tobago | 71,325 | 2018 | |
| 87. | Tunisia | 765,785 | 2018 | |
| 15. | Turkey | 6,973,744 | 2018 | |
| 109. | Turkmenistan | 448,184 | 2018 | |
| 209. | Turks and Caicos Islands | 3,519 | 2018 | |
| 222. | Tuvalu | 991 | 2018 | |
| 198. | U.S. Virgin Islands | 6,284 | 2018 | |
| 23. | Uganda | 4,900,785 | 2018 | |
| 56. | Ukraine | 1,906,569 | 2018 | |
| 117. | United Arab Emirates | 325,279 | 2018 | |
| 31. | United Kingdom | 3,564,033 | 2018 | |
| 5. | United States of America | 21,593,448 | 2018 | |
| 133. | Uruguay | 254,481 | 2018 | |
| 47. | Uzbekistan | 2,480,419 | 2018 | |
| 181. | Vanuatu | 21,939 | 2018 | |
| 43. | Venezuela | 2,727,869 | 2018 | |
| 14. | Vietnam | 7,402,021 | 2018 | |
| 220. | Wallis and Futuna | 1,297 | 2018 | |
| 122. | West Bank | 305,601 | 2018 | |
| 166. | Western Sahara | 63,589 | 2018 | |
| 34. | Yemen | 3,260,174 | 2018 | |
| 59. | Zambia | 1,842,532 | 2018 | |
| 64. | Zimbabwe | 1,626,017 | 2018 |
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