The World: Population - Age 25-29 (2015) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 61. | Zimbabwe | 1,487,791 | 2015 | |
| 69. | Zambia | 1,215,425 | 2015 | |
| 48. | Yemen | 2,307,418 | 2015 | |
| 172. | Western Sahara | 47,011 | 2015 | |
| 140. | West Bank | 247,956 | 2015 | |
| 220. | Wallis and Futuna | 1,298 | 2015 | |
| 13. | Vietnam | 8,876,741 | 2015 | |
| 47. | Venezuela | 2,344,062 | 2015 | |
| 179. | Vanuatu | 22,522 | 2015 | |
| 34. | Uzbekistan | 3,046,560 | 2015 | |
| 141. | Uruguay | 246,491 | 2015 | |
| 3. | United States of America | 22,104,834 | 2015 | |
| 23. | United Kingdom | 4,480,744 | 2015 | |
| 82. | United Arab Emirates | 846,660 | 2015 | |
| 30. | Ukraine | 3,546,429 | 2015 | |
| 35. | Uganda | 3,014,280 | 2015 | |
| 199. | U.S. Virgin Islands | 6,155 | 2015 | |
| 222. | Tuvalu | 1,026 | 2015 | |
| 205. | Turks and Caicos Islands | 4,224 | 2015 | |
| 105. | Turkmenistan | 529,031 | 2015 | |
| 16. | Turkey | 6,803,441 | 2015 | |
| 76. | Tunisia | 913,124 | 2015 | |
| 156. | Trinidad and Tobago | 104,952 | 2015 | |
| 193. | Tonga | 8,001 | 2015 | |
| 91. | Togo | 640,200 | 2015 | |
| 147. | The Gambia | 172,967 | 2015 | |
| 177. | The Bahamas | 24,848 | 2015 | |
| 22. | Thailand | 4,823,584 | 2015 | |
| 25. | Tanzania | 4,030,070 | 2015 | |
| 84. | Tajikistan | 822,813 | 2015 | |
| 60. | Taiwan | 1,591,685 | 2015 | |
| 49. | Syria | 2,163,252 | 2015 | |
| 109. | Switzerland | 489,083 | 2015 | |
| 93. | Sweden | 632,755 | 2015 | |
| 150. | Swaziland | 143,382 | 2015 | |
| 170. | Suriname | 49,939 | 2015 | |
| 26. | Sudan | 4,011,909 | 2015 | |
| 59. | Sri Lanka | 1,614,540 | 2015 | |
| 41. | Spain | 2,750,351 | 2015 | |
| 33. | South Korea | 3,095,073 | 2015 | |
| 21. | South Africa | 4,958,123 | 2015 | |
| 85. | Somalia | 820,073 | 2015 | |
| 168. | Solomon Islands | 51,382 | 2015 | |
| 154. | Slovenia | 124,928 | 2015 | |
| 116. | Slovakia | 406,119 | 2015 | |
| 214. | Sint Maarten | 2,508 | 2015 | |
| 95. | Singapore | 623,299 | 2015 | |
| 111. | Sierra Leone | 468,253 | 2015 | |
| 196. | Seychelles | 7,299 | 2015 | |
| 110. | Serbia | 469,419 | 2015 | |
| 71. | Senegal | 1,132,951 | 2015 | |
| 36. | Saudi Arabia | 2,962,534 | 2015 | |
| 184. | Sao Tome and Principe | 14,547 | 2015 | |
| 218. | San Marino | 1,625 | 2015 | |
| 183. | Samoa | 15,881 | 2015 | |
| 194. | Saint Vincent and the Grenadines | 7,775 | 2015 | |
| 228. | Saint Pierre and Miquelon | 225 | 2015 | |
| 213. | Saint Martin | 2,728 | 2015 | |
| 187. | Saint Lucia | 12,298 | 2015 | |
| 207. | Saint Kitts and Nevis | 3,938 | 2015 | |
| 226. | Saint Helena | 450 | 2015 | |
| 225. | Saint Barthélemy | 502 | 2015 | |
| 72. | Rwanda | 1,073,587 | 2015 | |
| 9. | Russia | 11,676,882 | 2015 | |
| 55. | Romania | 1,696,493 | 2015 | |
| 117. | Republic of Congo | 367,449 | 2015 | |
| 126. | Qatar | 326,802 | 2015 | |
| 139. | Puerto Rico | 262,379 | 2015 | |
| 90. | Portugal | 653,322 | 2015 | |
| 40. | Poland | 2,799,562 | 2015 | |
| 12. | Philippines | 9,196,542 | 2015 | |
| 43. | Peru | 2,572,447 | 2015 | |
| 96. | Paraguay | 614,481 | 2015 | |
| 104. | Papua New Guinea | 531,573 | 2015 | |
| 134. | Panama | 289,029 | 2015 | |
| 217. | Palau | 1,648 | 2015 | |
| 5. | Pakistan | 18,402,196 | 2015 | |
| 120. | Oman | 352,608 | 2015 | |
| 131. | Norway | 301,121 | 2015 | |
| 211. | Northern Mariana Islands | 3,003 | 2015 | |
| 52. | North Korea | 1,903,345 | 2015 | |
| 7. | Nigeria | 13,981,825 | 2015 | |
| 68. | Niger | 1,293,950 | 2015 | |
| 103. | Nicaragua | 540,666 | 2015 | |
| 132. | New Zealand | 293,938 | 2015 | |
| 181. | New Caledonia | 21,328 | 2015 | |
| 188. | Netherlands Antilles | 10,922 | 2015 | |
| 73. | Netherlands | 1,067,205 | 2015 | |
| 39. | Nepal | 2,847,591 | 2015 | |
| 223. | Nauru | 1,002 | 2015 | |
| 142. | Namibia | 227,058 | 2015 | |
| 20. | Myanmar | 5,042,994 | 2015 | |
| 54. | Mozambique | 1,831,381 | 2015 | |
| 37. | Morocco | 2,954,849 | 2015 | |
| 227. | Montserrat | 380 | 2015 | |
| 171. | Montenegro | 49,033 | 2015 | |
| 121. | Mongolia | 340,587 | 2015 | |
| 219. | Monaco | 1,394 | 2015 | |
| 129. | Moldova | 316,844 | 2015 | |
| 10. | Mexico | 9,741,382 | 2015 |
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