The World: Population - Age 20-24 (2015) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 65. | Zimbabwe | 1,514,876 | 2015 | |
| 67. | Zambia | 1,425,495 | 2015 | |
| 44. | Yemen | 2,621,577 | 2015 | |
| 168. | Western Sahara | 53,015 | 2015 | |
| 131. | West Bank | 291,060 | 2015 | |
| 219. | Wallis and Futuna | 1,386 | 2015 | |
| 12. | Vietnam | 8,684,524 | 2015 | |
| 42. | Venezuela | 2,729,192 | 2015 | |
| 181. | Vanuatu | 22,903 | 2015 | |
| 36. | Uzbekistan | 3,113,656 | 2015 | |
| 138. | Uruguay | 261,507 | 2015 | |
| 3. | United States of America | 22,045,448 | 2015 | |
| 25. | United Kingdom | 4,228,105 | 2015 | |
| 110. | United Arab Emirates | 489,621 | 2015 | |
| 41. | Ukraine | 2,732,912 | 2015 | |
| 29. | Uganda | 3,788,284 | 2015 | |
| 199. | U.S. Virgin Islands | 6,678 | 2015 | |
| 221. | Tuvalu | 1,124 | 2015 | |
| 209. | Turks and Caicos Islands | 3,840 | 2015 | |
| 105. | Turkmenistan | 544,926 | 2015 | |
| 17. | Turkey | 6,797,973 | 2015 | |
| 82. | Tunisia | 910,895 | 2015 | |
| 159. | Trinidad and Tobago | 80,822 | 2015 | |
| 191. | Tonga | 9,427 | 2015 | |
| 87. | Togo | 708,558 | 2015 | |
| 143. | The Gambia | 198,238 | 2015 | |
| 176. | The Bahamas | 28,377 | 2015 | |
| 19. | Thailand | 5,181,916 | 2015 | |
| 23. | Tanzania | 4,700,082 | 2015 | |
| 85. | Tajikistan | 810,787 | 2015 | |
| 61. | Taiwan | 1,592,566 | 2015 | |
| 52. | Syria | 2,233,657 | 2015 | |
| 111. | Switzerland | 477,568 | 2015 | |
| 93. | Sweden | 625,129 | 2015 | |
| 150. | Swaziland | 156,472 | 2015 | |
| 170. | Suriname | 47,863 | 2015 | |
| 22. | Sudan | 4,811,237 | 2015 | |
| 58. | Sri Lanka | 1,662,830 | 2015 | |
| 48. | Spain | 2,376,250 | 2015 | |
| 32. | South Korea | 3,429,979 | 2015 | |
| 21. | South Africa | 4,936,443 | 2015 | |
| 83. | Somalia | 888,499 | 2015 | |
| 166. | Solomon Islands | 58,732 | 2015 | |
| 156. | Slovenia | 102,288 | 2015 | |
| 118. | Slovakia | 358,738 | 2015 | |
| 212. | Sint Maarten | 3,279 | 2015 | |
| 103. | Singapore | 586,026 | 2015 | |
| 107. | Sierra Leone | 516,048 | 2015 | |
| 198. | Seychelles | 6,776 | 2015 | |
| 113. | Serbia | 433,034 | 2015 | |
| 70. | Senegal | 1,328,032 | 2015 | |
| 40. | Saudi Arabia | 2,776,847 | 2015 | |
| 184. | Sao Tome and Principe | 16,906 | 2015 | |
| 218. | San Marino | 1,738 | 2015 | |
| 183. | Samoa | 18,840 | 2015 | |
| 193. | Saint Vincent and the Grenadines | 8,422 | 2015 | |
| 228. | Saint Pierre and Miquelon | 214 | 2015 | |
| 217. | Saint Martin | 1,772 | 2015 | |
| 187. | Saint Lucia | 13,534 | 2015 | |
| 208. | Saint Kitts and Nevis | 3,849 | 2015 | |
| 225. | Saint Helena | 452 | 2015 | |
| 227. | Saint Barthélemy | 305 | 2015 | |
| 75. | Rwanda | 1,053,249 | 2015 | |
| 15. | Russia | 7,825,290 | 2015 | |
| 71. | Romania | 1,231,293 | 2015 | |
| 112. | Republic of Congo | 449,857 | 2015 | |
| 144. | Qatar | 195,565 | 2015 | |
| 134. | Puerto Rico | 275,517 | 2015 | |
| 94. | Portugal | 623,821 | 2015 | |
| 47. | Poland | 2,429,188 | 2015 | |
| 10. | Philippines | 9,901,493 | 2015 | |
| 38. | Peru | 2,917,442 | 2015 | |
| 89. | Paraguay | 687,887 | 2015 | |
| 95. | Papua New Guinea | 618,114 | 2015 | |
| 128. | Panama | 303,230 | 2015 | |
| 216. | Palau | 1,841 | 2015 | |
| 5. | Pakistan | 20,676,370 | 2015 | |
| 122. | Oman | 331,801 | 2015 | |
| 124. | Norway | 319,631 | 2015 | |
| 211. | Northern Mariana Islands | 3,352 | 2015 | |
| 53. | North Korea | 2,068,718 | 2015 | |
| 7. | Nigeria | 16,343,153 | 2015 | |
| 60. | Niger | 1,601,892 | 2015 | |
| 90. | Nicaragua | 671,681 | 2015 | |
| 126. | New Zealand | 310,405 | 2015 | |
| 180. | New Caledonia | 22,980 | 2015 | |
| 188. | Netherlands Antilles | 11,332 | 2015 | |
| 73. | Netherlands | 1,055,918 | 2015 | |
| 31. | Nepal | 3,441,222 | 2015 | |
| 224. | Nauru | 741 | 2015 | |
| 139. | Namibia | 248,873 | 2015 | |
| 20. | Myanmar | 5,128,567 | 2015 | |
| 46. | Mozambique | 2,478,212 | 2015 | |
| 39. | Morocco | 2,872,697 | 2015 | |
| 226. | Montserrat | 360 | 2015 | |
| 173. | Montenegro | 36,144 | 2015 | |
| 129. | Mongolia | 299,334 | 2015 | |
| 220. | Monaco | 1,369 | 2015 | |
| 137. | Moldova | 265,916 | 2015 | |
| 9. | Mexico | 10,339,594 | 2015 |
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