The World: Population - Age 25-29 (2020) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 65. | Zimbabwe | 1,460,587 | 2020 | |
| 68. | Zambia | 1,382,505 | 2020 | |
| 44. | Yemen | 2,590,474 | 2020 | |
| 168. | Western Sahara | 53,728 | 2020 | |
| 133. | West Bank | 290,046 | 2020 | |
| 220. | Wallis and Futuna | 1,295 | 2020 | |
| 12. | Vietnam | 8,610,599 | 2020 | |
| 41. | Venezuela | 2,714,387 | 2020 | |
| 181. | Vanuatu | 22,614 | 2020 | |
| 37. | Uzbekistan | 3,074,395 | 2020 | |
| 139. | Uruguay | 256,915 | 2020 | |
| 3. | United States of America | 22,558,640 | 2020 | |
| 25. | United Kingdom | 4,381,974 | 2020 | |
| 81. | United Arab Emirates | 926,185 | 2020 | |
| 42. | Ukraine | 2,700,410 | 2020 | |
| 29. | Uganda | 3,669,623 | 2020 | |
| 199. | U.S. Virgin Islands | 6,273 | 2020 | |
| 222. | Tuvalu | 1,093 | 2020 | |
| 205. | Turks and Caicos Islands | 4,339 | 2020 | |
| 107. | Turkmenistan | 534,223 | 2020 | |
| 17. | Turkey | 6,768,839 | 2020 | |
| 84. | Tunisia | 854,110 | 2020 | |
| 160. | Trinidad and Tobago | 74,066 | 2020 | |
| 193. | Tonga | 8,196 | 2020 | |
| 88. | Togo | 700,570 | 2020 | |
| 144. | The Gambia | 195,614 | 2020 | |
| 176. | The Bahamas | 28,172 | 2020 | |
| 19. | Thailand | 5,147,463 | 2020 | |
| 23. | Tanzania | 4,554,782 | 2020 | |
| 86. | Tajikistan | 800,654 | 2020 | |
| 61. | Taiwan | 1,587,888 | 2020 | |
| 52. | Syria | 2,177,756 | 2020 | |
| 111. | Switzerland | 491,671 | 2020 | |
| 94. | Sweden | 639,696 | 2020 | |
| 150. | Swaziland | 151,921 | 2020 | |
| 169. | Suriname | 47,828 | 2020 | |
| 22. | Sudan | 4,708,456 | 2020 | |
| 58. | Sri Lanka | 1,640,505 | 2020 | |
| 43. | Spain | 2,634,015 | 2020 | |
| 32. | South Korea | 3,422,886 | 2020 | |
| 21. | South Africa | 4,712,663 | 2020 | |
| 85. | Somalia | 844,146 | 2020 | |
| 166. | Solomon Islands | 58,259 | 2020 | |
| 157. | Slovenia | 102,579 | 2020 | |
| 118. | Slovakia | 359,117 | 2020 | |
| 212. | Sint Maarten | 3,167 | 2020 | |
| 91. | Singapore | 656,044 | 2020 | |
| 109. | Sierra Leone | 500,579 | 2020 | |
| 198. | Seychelles | 7,122 | 2020 | |
| 113. | Serbia | 431,681 | 2020 | |
| 70. | Senegal | 1,281,570 | 2020 | |
| 36. | Saudi Arabia | 3,089,250 | 2020 | |
| 185. | Sao Tome and Principe | 15,527 | 2020 | |
| 218. | San Marino | 1,873 | 2020 | |
| 183. | Samoa | 17,685 | 2020 | |
| 195. | Saint Vincent and the Grenadines | 7,524 | 2020 | |
| 228. | Saint Pierre and Miquelon | 190 | 2020 | |
| 215. | Saint Martin | 2,458 | 2020 | |
| 187. | Saint Lucia | 12,277 | 2020 | |
| 210. | Saint Kitts and Nevis | 3,779 | 2020 | |
| 226. | Saint Helena | 451 | 2020 | |
| 225. | Saint Barthélemy | 512 | 2020 | |
| 74. | Rwanda | 1,037,708 | 2020 | |
| 14. | Russia | 7,736,651 | 2020 | |
| 71. | Romania | 1,224,252 | 2020 | |
| 112. | Republic of Congo | 437,416 | 2020 | |
| 125. | Qatar | 321,388 | 2020 | |
| 138. | Puerto Rico | 260,193 | 2020 | |
| 95. | Portugal | 628,696 | 2020 | |
| 48. | Poland | 2,412,656 | 2020 | |
| 10. | Philippines | 9,761,588 | 2020 | |
| 39. | Peru | 2,844,794 | 2020 | |
| 90. | Paraguay | 681,136 | 2020 | |
| 96. | Papua New Guinea | 611,001 | 2020 | |
| 130. | Panama | 301,278 | 2020 | |
| 217. | Palau | 1,947 | 2020 | |
| 5. | Pakistan | 20,306,532 | 2020 | |
| 117. | Oman | 373,878 | 2020 | |
| 124. | Norway | 324,177 | 2020 | |
| 211. | Northern Mariana Islands | 3,554 | 2020 | |
| 53. | North Korea | 2,049,859 | 2020 | |
| 7. | Nigeria | 15,867,118 | 2020 | |
| 62. | Niger | 1,569,943 | 2020 | |
| 92. | Nicaragua | 645,343 | 2020 | |
| 127. | New Zealand | 308,092 | 2020 | |
| 179. | New Caledonia | 23,693 | 2020 | |
| 188. | Netherlands Antilles | 11,196 | 2020 | |
| 72. | Netherlands | 1,106,109 | 2020 | |
| 31. | Nepal | 3,447,374 | 2020 | |
| 223. | Nauru | 716 | 2020 | |
| 140. | Namibia | 240,729 | 2020 | |
| 20. | Myanmar | 5,063,099 | 2020 | |
| 49. | Mozambique | 2,373,265 | 2020 | |
| 40. | Morocco | 2,782,250 | 2020 | |
| 227. | Montserrat | 358 | 2020 | |
| 174. | Montenegro | 35,631 | 2020 | |
| 132. | Mongolia | 297,854 | 2020 | |
| 219. | Monaco | 1,342 | 2020 | |
| 141. | Moldova | 236,931 | 2020 | |
| 9. | Mexico | 10,033,324 | 2020 |
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