The World: Population - Age 25-29 (2017) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 64. | Zimbabwe | 1,474,631 | 2017 | |
| 69. | Zambia | 1,268,266 | 2017 | |
| 46. | Yemen | 2,418,682 | 2017 | |
| 170. | Western Sahara | 49,790 | 2017 | |
| 138. | West Bank | 270,022 | 2017 | |
| 220. | Wallis and Futuna | 1,281 | 2017 | |
| 13. | Vietnam | 9,003,986 | 2017 | |
| 45. | Venezuela | 2,507,357 | 2017 | |
| 180. | Vanuatu | 22,822 | 2017 | |
| 36. | Uzbekistan | 3,096,168 | 2017 | |
| 141. | Uruguay | 252,168 | 2017 | |
| 3. | United States of America | 22,663,036 | 2017 | |
| 23. | United Kingdom | 4,510,316 | 2017 | |
| 81. | United Arab Emirates | 879,346 | 2017 | |
| 33. | Ukraine | 3,222,747 | 2017 | |
| 32. | Uganda | 3,266,406 | 2017 | |
| 198. | U.S. Virgin Islands | 6,299 | 2017 | |
| 222. | Tuvalu | 1,074 | 2017 | |
| 206. | Turks and Caicos Islands | 4,178 | 2017 | |
| 107. | Turkmenistan | 530,861 | 2017 | |
| 17. | Turkey | 6,802,689 | 2017 | |
| 82. | Tunisia | 873,100 | 2017 | |
| 160. | Trinidad and Tobago | 88,839 | 2017 | |
| 193. | Tonga | 7,856 | 2017 | |
| 89. | Togo | 670,224 | 2017 | |
| 145. | The Gambia | 182,563 | 2017 | |
| 177. | The Bahamas | 26,815 | 2017 | |
| 22. | Thailand | 4,914,841 | 2017 | |
| 25. | Tanzania | 4,248,377 | 2017 | |
| 85. | Tajikistan | 836,491 | 2017 | |
| 59. | Taiwan | 1,587,331 | 2017 | |
| 49. | Syria | 2,198,950 | 2017 | |
| 109. | Switzerland | 497,666 | 2017 | |
| 90. | Sweden | 660,543 | 2017 | |
| 151. | Swaziland | 147,961 | 2017 | |
| 171. | Suriname | 48,554 | 2017 | |
| 24. | Sudan | 4,266,038 | 2017 | |
| 58. | Sri Lanka | 1,610,043 | 2017 | |
| 41. | Spain | 2,700,700 | 2017 | |
| 34. | South Korea | 3,189,350 | 2017 | |
| 21. | South Africa | 4,929,580 | 2017 | |
| 83. | Somalia | 873,073 | 2017 | |
| 166. | Solomon Islands | 54,057 | 2017 | |
| 155. | Slovenia | 116,384 | 2017 | |
| 117. | Slovakia | 390,091 | 2017 | |
| 212. | Sint Maarten | 3,085 | 2017 | |
| 93. | Singapore | 651,119 | 2017 | |
| 110. | Sierra Leone | 485,331 | 2017 | |
| 196. | Seychelles | 7,161 | 2017 | |
| 112. | Serbia | 452,097 | 2017 | |
| 71. | Senegal | 1,193,405 | 2017 | |
| 37. | Saudi Arabia | 3,019,389 | 2017 | |
| 185. | Sao Tome and Principe | 14,627 | 2017 | |
| 218. | San Marino | 1,693 | 2017 | |
| 183. | Samoa | 16,935 | 2017 | |
| 194. | Saint Vincent and the Grenadines | 7,589 | 2017 | |
| 228. | Saint Pierre and Miquelon | 168 | 2017 | |
| 214. | Saint Martin | 2,602 | 2017 | |
| 187. | Saint Lucia | 11,872 | 2017 | |
| 208. | Saint Kitts and Nevis | 3,947 | 2017 | |
| 226. | Saint Helena | 416 | 2017 | |
| 225. | Saint Barthélemy | 503 | 2017 | |
| 73. | Rwanda | 1,090,843 | 2017 | |
| 9. | Russia | 10,371,751 | 2017 | |
| 62. | Romania | 1,519,000 | 2017 | |
| 116. | Republic of Congo | 395,815 | 2017 | |
| 126. | Qatar | 327,518 | 2017 | |
| 140. | Puerto Rico | 263,016 | 2017 | |
| 96. | Portugal | 644,370 | 2017 | |
| 43. | Poland | 2,622,506 | 2017 | |
| 11. | Philippines | 9,415,306 | 2017 | |
| 42. | Peru | 2,693,294 | 2017 | |
| 95. | Paraguay | 646,461 | 2017 | |
| 104. | Papua New Guinea | 560,950 | 2017 | |
| 133. | Panama | 295,084 | 2017 | |
| 217. | Palau | 1,769 | 2017 | |
| 5. | Pakistan | 19,292,872 | 2017 | |
| 118. | Oman | 362,516 | 2017 | |
| 127. | Norway | 317,873 | 2017 | |
| 211. | Northern Mariana Islands | 3,291 | 2017 | |
| 53. | North Korea | 1,992,325 | 2017 | |
| 7. | Nigeria | 14,692,521 | 2017 | |
| 67. | Niger | 1,388,454 | 2017 | |
| 100. | Nicaragua | 584,592 | 2017 | |
| 131. | New Zealand | 307,336 | 2017 | |
| 181. | New Caledonia | 22,687 | 2017 | |
| 188. | Netherlands Antilles | 10,725 | 2017 | |
| 72. | Netherlands | 1,093,630 | 2017 | |
| 35. | Nepal | 3,110,593 | 2017 | |
| 223. | Nauru | 915 | 2017 | |
| 142. | Namibia | 232,279 | 2017 | |
| 19. | Myanmar | 5,063,167 | 2017 | |
| 51. | Mozambique | 2,069,842 | 2017 | |
| 39. | Morocco | 2,856,809 | 2017 | |
| 227. | Montserrat | 341 | 2017 | |
| 172. | Montenegro | 43,909 | 2017 | |
| 122. | Mongolia | 336,116 | 2017 | |
| 219. | Monaco | 1,468 | 2017 | |
| 136. | Moldova | 285,346 | 2017 | |
| 10. | Mexico | 9,907,884 | 2017 |
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