The World: Population - Age 20-24 (2020) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 64. | Zimbabwe | 1,541,013 | 2020 | |
| 60. | Zambia | 1,660,527 | 2020 | |
| 36. | Yemen | 2,987,984 | 2020 | |
| 166. | Western Sahara | 60,051 | 2020 | |
| 124. | West Bank | 307,499 | 2020 | |
| 221. | Wallis and Futuna | 1,145 | 2020 | |
| 14. | Vietnam | 7,494,107 | 2020 | |
| 42. | Venezuela | 2,737,752 | 2020 | |
| 180. | Vanuatu | 22,093 | 2020 | |
| 43. | Uzbekistan | 2,672,949 | 2020 | |
| 131. | Uruguay | 266,583 | 2020 | |
| 5. | United States of America | 21,395,486 | 2020 | |
| 29. | United Kingdom | 3,963,029 | 2020 | |
| 102. | United Arab Emirates | 531,985 | 2020 | |
| 53. | Ukraine | 2,085,924 | 2020 | |
| 25. | Uganda | 4,387,798 | 2020 | |
| 200. | U.S. Virgin Islands | 5,668 | 2020 | |
| 222. | Tuvalu | 1,048 | 2020 | |
| 206. | Turks and Caicos Islands | 3,826 | 2020 | |
| 108. | Turkmenistan | 473,688 | 2020 | |
| 15. | Turkey | 6,904,066 | 2020 | |
| 84. | Tunisia | 764,303 | 2020 | |
| 164. | Trinidad and Tobago | 66,271 | 2020 | |
| 190. | Tonga | 9,860 | 2020 | |
| 85. | Togo | 758,703 | 2020 | |
| 140. | The Gambia | 209,331 | 2020 | |
| 176. | The Bahamas | 27,160 | 2020 | |
| 22. | Thailand | 4,760,543 | 2020 | |
| 20. | Tanzania | 5,297,258 | 2020 | |
| 83. | Tajikistan | 795,309 | 2020 | |
| 66. | Taiwan | 1,498,951 | 2020 | |
| 49. | Syria | 2,338,816 | 2020 | |
| 113. | Switzerland | 444,522 | 2020 | |
| 107. | Sweden | 496,371 | 2020 | |
| 150. | Swaziland | 161,706 | 2020 | |
| 169. | Suriname | 53,424 | 2020 | |
| 19. | Sudan | 5,326,874 | 2020 | |
| 62. | Sri Lanka | 1,576,650 | 2020 | |
| 48. | Spain | 2,417,034 | 2020 | |
| 34. | South Korea | 3,206,102 | 2020 | |
| 23. | South Africa | 4,590,776 | 2020 | |
| 79. | Somalia | 1,062,766 | 2020 | |
| 165. | Solomon Islands | 65,249 | 2020 | |
| 156. | Slovenia | 91,588 | 2020 | |
| 129. | Slovakia | 289,942 | 2020 | |
| 211. | Sint Maarten | 3,214 | 2020 | |
| 100. | Singapore | 561,967 | 2020 | |
| 99. | Sierra Leone | 565,859 | 2020 | |
| 199. | Seychelles | 6,004 | 2020 | |
| 115. | Serbia | 388,634 | 2020 | |
| 67. | Senegal | 1,483,792 | 2020 | |
| 41. | Saudi Arabia | 2,792,483 | 2020 | |
| 183. | Sao Tome and Principe | 20,458 | 2020 | |
| 215. | San Marino | 2,040 | 2020 | |
| 184. | Samoa | 19,034 | 2020 | |
| 195. | Saint Vincent and the Grenadines | 7,549 | 2020 | |
| 228. | Saint Pierre and Miquelon | 203 | 2020 | |
| 217. | Saint Martin | 1,712 | 2020 | |
| 187. | Saint Lucia | 11,818 | 2020 | |
| 209. | Saint Kitts and Nevis | 3,736 | 2020 | |
| 226. | Saint Helena | 487 | 2020 | |
| 227. | Saint Barthélemy | 318 | 2020 | |
| 70. | Rwanda | 1,318,131 | 2020 | |
| 16. | Russia | 6,242,375 | 2020 | |
| 75. | Romania | 1,134,251 | 2020 | |
| 103. | Republic of Congo | 526,644 | 2020 | |
| 143. | Qatar | 190,515 | 2020 | |
| 135. | Puerto Rico | 260,242 | 2020 | |
| 95. | Portugal | 621,330 | 2020 | |
| 56. | Poland | 1,953,002 | 2020 | |
| 9. | Philippines | 10,761,627 | 2020 | |
| 40. | Peru | 2,796,182 | 2020 | |
| 91. | Paraguay | 667,997 | 2020 | |
| 90. | Papua New Guinea | 695,620 | 2020 | |
| 120. | Panama | 324,015 | 2020 | |
| 218. | Palau | 1,654 | 2020 | |
| 4. | Pakistan | 21,731,496 | 2020 | |
| 118. | Oman | 334,850 | 2020 | |
| 121. | Norway | 316,104 | 2020 | |
| 212. | Northern Mariana Islands | 2,846 | 2020 | |
| 58. | North Korea | 1,934,322 | 2020 | |
| 6. | Nigeria | 18,895,680 | 2020 | |
| 55. | Niger | 2,014,178 | 2020 | |
| 96. | Nicaragua | 618,535 | 2020 | |
| 126. | New Zealand | 300,535 | 2020 | |
| 178. | New Caledonia | 23,412 | 2020 | |
| 189. | Netherlands Antilles | 10,275 | 2020 | |
| 80. | Netherlands | 1,046,581 | 2020 | |
| 31. | Nepal | 3,617,215 | 2020 | |
| 223. | Nauru | 762 | 2020 | |
| 137. | Namibia | 257,256 | 2020 | |
| 21. | Myanmar | 4,959,013 | 2020 | |
| 38. | Mozambique | 2,875,138 | 2020 | |
| 39. | Morocco | 2,857,001 | 2020 | |
| 224. | Montserrat | 733 | 2020 | |
| 175. | Montenegro | 29,218 | 2020 | |
| 130. | Mongolia | 283,087 | 2020 | |
| 219. | Monaco | 1,468 | 2020 | |
| 141. | Moldova | 194,175 | 2020 | |
| 11. | Mexico | 10,229,201 | 2020 |
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