The World: Population - Age 15-19 (2021) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 64. | Zimbabwe | 1,671,172 | 2021 | |
| 55. | Zambia | 2,042,743 | 2021 | |
| 33. | Yemen | 3,461,315 | 2021 | |
| 164. | Western Sahara | 68,357 | 2021 | |
| 121. | West Bank | 302,245 | 2021 | |
| 221. | Wallis and Futuna | 1,145 | 2021 | |
| 14. | Vietnam | 7,583,550 | 2021 | |
| 43. | Venezuela | 2,691,082 | 2021 | |
| 180. | Vanuatu | 21,675 | 2021 | |
| 52. | Uzbekistan | 2,375,982 | 2021 | |
| 132. | Uruguay | 241,572 | 2021 | |
| 5. | United States of America | 22,259,030 | 2021 | |
| 30. | United Kingdom | 3,651,197 | 2021 | |
| 115. | United Arab Emirates | 363,052 | 2021 | |
| 56. | Ukraine | 2,020,837 | 2021 | |
| 22. | Uganda | 5,455,714 | 2021 | |
| 198. | U.S. Virgin Islands | 6,302 | 2021 | |
| 222. | Tuvalu | 937 | 2021 | |
| 207. | Turks and Caicos Islands | 3,585 | 2021 | |
| 109. | Turkmenistan | 434,453 | 2021 | |
| 16. | Turkey | 7,005,503 | 2021 | |
| 86. | Tunisia | 787,159 | 2021 | |
| 163. | Trinidad and Tobago | 69,837 | 2021 | |
| 187. | Tonga | 10,918 | 2021 | |
| 83. | Togo | 905,226 | 2021 | |
| 136. | The Gambia | 231,916 | 2021 | |
| 178. | The Bahamas | 24,745 | 2021 | |
| 25. | Thailand | 4,316,726 | 2021 | |
| 20. | Tanzania | 5,814,410 | 2021 | |
| 84. | Tajikistan | 829,975 | 2021 | |
| 78. | Taiwan | 1,119,258 | 2021 | |
| 50. | Syria | 2,435,980 | 2021 | |
| 111. | Switzerland | 391,659 | 2021 | |
| 106. | Sweden | 493,035 | 2021 | |
| 146. | Swaziland | 172,702 | 2021 | |
| 169. | Suriname | 50,637 | 2021 | |
| 18. | Sudan | 6,105,493 | 2021 | |
| 61. | Sri Lanka | 1,780,041 | 2021 | |
| 47. | Spain | 2,592,301 | 2021 | |
| 53. | South Korea | 2,354,175 | 2021 | |
| 24. | South Africa | 4,529,860 | 2021 | |
| 74. | Somalia | 1,289,580 | 2021 | |
| 162. | Solomon Islands | 71,181 | 2021 | |
| 159. | Slovenia | 89,171 | 2021 | |
| 127. | Slovakia | 283,830 | 2021 | |
| 212. | Sint Maarten | 2,564 | 2021 | |
| 116. | Singapore | 361,498 | 2021 | |
| 91. | Sierra Leone | 706,188 | 2021 | |
| 199. | Seychelles | 5,831 | 2021 | |
| 113. | Serbia | 380,065 | 2021 | |
| 62. | Senegal | 1,762,512 | 2021 | |
| 51. | Saudi Arabia | 2,395,514 | 2021 | |
| 177. | Sao Tome and Principe | 25,578 | 2021 | |
| 215. | San Marino | 1,927 | 2021 | |
| 182. | Samoa | 20,989 | 2021 | |
| 195. | Saint Vincent and the Grenadines | 7,250 | 2021 | |
| 227. | Saint Pierre and Miquelon | 260 | 2021 | |
| 218. | Saint Martin | 1,648 | 2021 | |
| 189. | Saint Lucia | 10,564 | 2021 | |
| 209. | Saint Kitts and Nevis | 3,359 | 2021 | |
| 225. | Saint Helena | 462 | 2021 | |
| 228. | Saint Barthélemy | 201 | 2021 | |
| 65. | Rwanda | 1,593,521 | 2021 | |
| 15. | Russia | 7,175,980 | 2021 | |
| 79. | Romania | 1,055,995 | 2021 | |
| 96. | Republic of Congo | 625,210 | 2021 | |
| 154. | Qatar | 98,979 | 2021 | |
| 135. | Puerto Rico | 237,369 | 2021 | |
| 97. | Portugal | 609,374 | 2021 | |
| 60. | Poland | 1,790,422 | 2021 | |
| 10. | Philippines | 11,677,572 | 2021 | |
| 44. | Peru | 2,688,104 | 2021 | |
| 98. | Paraguay | 598,347 | 2021 | |
| 88. | Papua New Guinea | 751,627 | 2021 | |
| 120. | Panama | 322,723 | 2021 | |
| 217. | Palau | 1,769 | 2021 | |
| 6. | Pakistan | 21,820,924 | 2021 | |
| 123. | Oman | 294,465 | 2021 | |
| 125. | Norway | 286,369 | 2021 | |
| 211. | Northern Mariana Islands | 2,970 | 2021 | |
| 59. | North Korea | 1,794,406 | 2021 | |
| 3. | Nigeria | 23,531,744 | 2021 | |
| 46. | Niger | 2,613,452 | 2021 | |
| 99. | Nicaragua | 580,799 | 2021 | |
| 122. | New Zealand | 298,732 | 2021 | |
| 179. | New Caledonia | 21,677 | 2021 | |
| 191. | Netherlands Antilles | 10,020 | 2021 | |
| 80. | Netherlands | 994,295 | 2021 | |
| 35. | Nepal | 3,335,633 | 2021 | |
| 223. | Nauru | 749 | 2021 | |
| 133. | Namibia | 238,891 | 2021 | |
| 23. | Myanmar | 4,837,106 | 2021 | |
| 34. | Mozambique | 3,365,677 | 2021 | |
| 39. | Morocco | 2,860,245 | 2021 | |
| 226. | Montserrat | 279 | 2021 | |
| 175. | Montenegro | 29,665 | 2021 | |
| 129. | Mongolia | 274,376 | 2021 | |
| 219. | Monaco | 1,491 | 2021 | |
| 145. | Moldova | 186,360 | 2021 | |
| 11. | Mexico | 10,337,316 | 2021 |
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