The World: Population - Age 15-19 (2018) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 64. | Zimbabwe | 1,626,017 | 2018 | |
| 59. | Zambia | 1,842,532 | 2018 | |
| 34. | Yemen | 3,260,174 | 2018 | |
| 166. | Western Sahara | 63,589 | 2018 | |
| 122. | West Bank | 305,601 | 2018 | |
| 220. | Wallis and Futuna | 1,297 | 2018 | |
| 14. | Vietnam | 7,402,021 | 2018 | |
| 43. | Venezuela | 2,727,869 | 2018 | |
| 181. | Vanuatu | 21,939 | 2018 | |
| 47. | Uzbekistan | 2,480,419 | 2018 | |
| 133. | Uruguay | 254,481 | 2018 | |
| 5. | United States of America | 21,593,448 | 2018 | |
| 31. | United Kingdom | 3,564,033 | 2018 | |
| 117. | United Arab Emirates | 325,279 | 2018 | |
| 56. | Ukraine | 1,906,569 | 2018 | |
| 23. | Uganda | 4,900,785 | 2018 | |
| 198. | U.S. Virgin Islands | 6,284 | 2018 | |
| 222. | Tuvalu | 991 | 2018 | |
| 209. | Turks and Caicos Islands | 3,519 | 2018 | |
| 109. | Turkmenistan | 448,184 | 2018 | |
| 15. | Turkey | 6,973,744 | 2018 | |
| 87. | Tunisia | 765,785 | 2018 | |
| 162. | Trinidad and Tobago | 71,325 | 2018 | |
| 189. | Tonga | 11,150 | 2018 | |
| 83. | Togo | 829,559 | 2018 | |
| 138. | The Gambia | 219,566 | 2018 | |
| 177. | The Bahamas | 25,447 | 2018 | |
| 25. | Thailand | 4,355,655 | 2018 | |
| 20. | Tanzania | 5,647,364 | 2018 | |
| 84. | Tajikistan | 808,870 | 2018 | |
| 72. | Taiwan | 1,332,162 | 2018 | |
| 49. | Syria | 2,438,249 | 2018 | |
| 110. | Switzerland | 411,322 | 2018 | |
| 106. | Sweden | 481,162 | 2018 | |
| 147. | Swaziland | 168,235 | 2018 | |
| 169. | Suriname | 53,564 | 2018 | |
| 19. | Sudan | 5,738,186 | 2018 | |
| 62. | Sri Lanka | 1,687,583 | 2018 | |
| 50. | Spain | 2,401,894 | 2018 | |
| 41. | South Korea | 2,802,478 | 2018 | |
| 24. | South Africa | 4,595,111 | 2018 | |
| 75. | Somalia | 1,219,574 | 2018 | |
| 164. | Solomon Islands | 68,947 | 2018 | |
| 158. | Slovenia | 88,918 | 2018 | |
| 129. | Slovakia | 279,184 | 2018 | |
| 211. | Sint Maarten | 2,815 | 2018 | |
| 113. | Singapore | 385,904 | 2018 | |
| 93. | Sierra Leone | 633,232 | 2018 | |
| 199. | Seychelles | 5,905 | 2018 | |
| 115. | Serbia | 378,462 | 2018 | |
| 63. | Senegal | 1,634,371 | 2018 | |
| 46. | Saudi Arabia | 2,491,564 | 2018 | |
| 178. | Sao Tome and Principe | 23,995 | 2018 | |
| 215. | San Marino | 1,987 | 2018 | |
| 184. | Samoa | 20,676 | 2018 | |
| 193. | Saint Vincent and the Grenadines | 7,956 | 2018 | |
| 227. | Saint Pierre and Miquelon | 279 | 2018 | |
| 218. | Saint Martin | 1,610 | 2018 | |
| 187. | Saint Lucia | 11,544 | 2018 | |
| 206. | Saint Kitts and Nevis | 3,850 | 2018 | |
| 226. | Saint Helena | 477 | 2018 | |
| 228. | Saint Barthélemy | 209 | 2018 | |
| 68. | Rwanda | 1,443,395 | 2018 | |
| 16. | Russia | 6,438,368 | 2018 | |
| 79. | Romania | 1,095,457 | 2018 | |
| 100. | Republic of Congo | 579,708 | 2018 | |
| 154. | Qatar | 93,723 | 2018 | |
| 131. | Puerto Rico | 258,654 | 2018 | |
| 96. | Portugal | 618,446 | 2018 | |
| 60. | Poland | 1,816,953 | 2018 | |
| 10. | Philippines | 11,305,534 | 2018 | |
| 44. | Peru | 2,723,873 | 2018 | |
| 95. | Paraguay | 621,984 | 2018 | |
| 88. | Papua New Guinea | 733,617 | 2018 | |
| 119. | Panama | 321,861 | 2018 | |
| 217. | Palau | 1,710 | 2018 | |
| 4. | Pakistan | 22,116,202 | 2018 | |
| 123. | Oman | 300,980 | 2018 | |
| 124. | Norway | 300,664 | 2018 | |
| 212. | Northern Mariana Islands | 2,798 | 2018 | |
| 58. | North Korea | 1,890,109 | 2018 | |
| 6. | Nigeria | 21,537,400 | 2018 | |
| 52. | Niger | 2,322,945 | 2018 | |
| 97. | Nicaragua | 611,189 | 2018 | |
| 126. | New Zealand | 296,141 | 2018 | |
| 180. | New Caledonia | 22,561 | 2018 | |
| 191. | Netherlands Antilles | 9,808 | 2018 | |
| 80. | Netherlands | 1,027,927 | 2018 | |
| 32. | Nepal | 3,519,998 | 2018 | |
| 223. | Nauru | 831 | 2018 | |
| 132. | Namibia | 255,123 | 2018 | |
| 22. | Myanmar | 4,910,890 | 2018 | |
| 35. | Mozambique | 3,156,300 | 2018 | |
| 37. | Morocco | 2,895,786 | 2018 | |
| 224. | Montserrat | 793 | 2018 | |
| 174. | Montenegro | 29,530 | 2018 | |
| 130. | Mongolia | 271,381 | 2018 | |
| 219. | Monaco | 1,428 | 2018 | |
| 144. | Moldova | 186,787 | 2018 | |
| 11. | Mexico | 10,469,262 | 2018 |
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