The World: Population - Age 20-24 (2019) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 65. | Zimbabwe | 1,525,550 | 2019 | |
| 60. | Zambia | 1,614,990 | 2019 | |
| 37. | Yemen | 2,905,614 | 2019 | |
| 166. | Western Sahara | 58,597 | 2019 | |
| 125. | West Bank | 305,735 | 2019 | |
| 221. | Wallis and Futuna | 1,165 | 2019 | |
| 14. | Vietnam | 7,682,150 | 2019 | |
| 43. | Venezuela | 2,739,667 | 2019 | |
| 179. | Vanuatu | 22,243 | 2019 | |
| 42. | Uzbekistan | 2,778,304 | 2019 | |
| 133. | Uruguay | 268,507 | 2019 | |
| 5. | United States of America | 21,387,772 | 2019 | |
| 28. | United Kingdom | 4,012,864 | 2019 | |
| 104. | United Arab Emirates | 522,483 | 2019 | |
| 50. | Ukraine | 2,197,686 | 2019 | |
| 25. | Uganda | 4,270,996 | 2019 | |
| 200. | U.S. Virgin Islands | 5,837 | 2019 | |
| 222. | Tuvalu | 1,073 | 2019 | |
| 207. | Turks and Caicos Islands | 3,834 | 2019 | |
| 108. | Turkmenistan | 490,838 | 2019 | |
| 15. | Turkey | 6,879,274 | 2019 | |
| 83. | Tunisia | 793,043 | 2019 | |
| 164. | Trinidad and Tobago | 67,120 | 2019 | |
| 190. | Tonga | 9,838 | 2019 | |
| 85. | Togo | 744,628 | 2019 | |
| 140. | The Gambia | 207,243 | 2019 | |
| 176. | The Bahamas | 27,548 | 2019 | |
| 22. | Thailand | 4,959,677 | 2019 | |
| 20. | Tanzania | 5,185,967 | 2019 | |
| 84. | Tajikistan | 782,930 | 2019 | |
| 64. | Taiwan | 1,526,626 | 2019 | |
| 49. | Syria | 2,311,374 | 2019 | |
| 112. | Switzerland | 449,476 | 2019 | |
| 106. | Sweden | 514,327 | 2019 | |
| 149. | Swaziland | 160,234 | 2019 | |
| 169. | Suriname | 51,789 | 2019 | |
| 19. | Sudan | 5,227,457 | 2019 | |
| 61. | Sri Lanka | 1,583,177 | 2019 | |
| 48. | Spain | 2,376,192 | 2019 | |
| 34. | South Korea | 3,287,080 | 2019 | |
| 23. | South Africa | 4,633,395 | 2019 | |
| 80. | Somalia | 1,014,125 | 2019 | |
| 165. | Solomon Islands | 64,042 | 2019 | |
| 156. | Slovenia | 93,040 | 2019 | |
| 129. | Slovakia | 297,889 | 2019 | |
| 211. | Sint Maarten | 3,257 | 2019 | |
| 99. | Singapore | 568,105 | 2019 | |
| 100. | Sierra Leone | 552,784 | 2019 | |
| 199. | Seychelles | 6,125 | 2019 | |
| 115. | Serbia | 401,292 | 2019 | |
| 67. | Senegal | 1,450,625 | 2019 | |
| 41. | Saudi Arabia | 2,793,769 | 2019 | |
| 183. | Sao Tome and Principe | 19,717 | 2019 | |
| 216. | San Marino | 1,983 | 2019 | |
| 184. | Samoa | 19,081 | 2019 | |
| 196. | Saint Vincent and the Grenadines | 7,740 | 2019 | |
| 228. | Saint Pierre and Miquelon | 203 | 2019 | |
| 218. | Saint Martin | 1,708 | 2019 | |
| 187. | Saint Lucia | 12,374 | 2019 | |
| 209. | Saint Kitts and Nevis | 3,727 | 2019 | |
| 226. | Saint Helena | 484 | 2019 | |
| 227. | Saint Barthélemy | 314 | 2019 | |
| 71. | Rwanda | 1,236,001 | 2019 | |
| 16. | Russia | 6,405,198 | 2019 | |
| 75. | Romania | 1,138,530 | 2019 | |
| 107. | Republic of Congo | 510,932 | 2019 | |
| 143. | Qatar | 191,591 | 2019 | |
| 135. | Puerto Rico | 265,037 | 2019 | |
| 96. | Portugal | 612,821 | 2019 | |
| 54. | Poland | 2,025,843 | 2019 | |
| 9. | Philippines | 10,583,450 | 2019 | |
| 39. | Peru | 2,853,080 | 2019 | |
| 90. | Paraguay | 686,523 | 2019 | |
| 91. | Papua New Guinea | 681,959 | 2019 | |
| 120. | Panama | 320,980 | 2019 | |
| 217. | Palau | 1,743 | 2019 | |
| 4. | Pakistan | 21,585,582 | 2019 | |
| 119. | Oman | 336,428 | 2019 | |
| 123. | Norway | 317,413 | 2019 | |
| 212. | Northern Mariana Islands | 2,816 | 2019 | |
| 56. | North Korea | 1,964,090 | 2019 | |
| 6. | Nigeria | 18,276,350 | 2019 | |
| 57. | Niger | 1,926,048 | 2019 | |
| 94. | Nicaragua | 631,413 | 2019 | |
| 126. | New Zealand | 300,388 | 2019 | |
| 178. | New Caledonia | 23,205 | 2019 | |
| 189. | Netherlands Antilles | 10,784 | 2019 | |
| 79. | Netherlands | 1,038,718 | 2019 | |
| 31. | Nepal | 3,645,659 | 2019 | |
| 224. | Nauru | 756 | 2019 | |
| 138. | Namibia | 257,093 | 2019 | |
| 21. | Myanmar | 4,998,481 | 2019 | |
| 40. | Mozambique | 2,802,522 | 2019 | |
| 38. | Morocco | 2,869,483 | 2019 | |
| 223. | Montserrat | 775 | 2019 | |
| 175. | Montenegro | 29,710 | 2019 | |
| 130. | Mongolia | 288,444 | 2019 | |
| 219. | Monaco | 1,466 | 2019 | |
| 141. | Moldova | 206,272 | 2019 | |
| 10. | Mexico | 10,269,564 | 2019 |
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