The World: Population - Age 20-24 (2019) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 213. | British Virgin Islands | 2,510 | 2019 | |
| 7. | Brazil | 17,141,476 | 2019 | |
| 139. | Botswana | 236,424 | 2019 | |
| 134. | Bosnia and Herzegovina | 265,950 | 2019 | |
| 78. | Bolivia | 1,062,081 | 2019 | |
| 163. | Bhutan | 70,876 | 2019 | |
| 204. | Bermuda | 4,280 | 2019 | |
| 77. | Benin | 1,097,374 | 2019 | |
| 172. | Belize | 36,796 | 2019 | |
| 98. | Belgium | 593,649 | 2019 | |
| 109. | Belarus | 473,905 | 2019 | |
| 185. | Barbados | 18,285 | 2019 | |
| 8. | Bangladesh | 16,164,850 | 2019 | |
| 152. | Bahrain | 125,496 | 2019 | |
| 86. | Azerbaijan | 732,298 | 2019 | |
| 111. | Austria | 464,884 | 2019 | |
| 63. | Australia | 1,553,644 | 2019 | |
| 194. | Aruba | 7,806 | 2019 | |
| 142. | Armenia | 202,146 | 2019 | |
| 33. | Argentina | 3,359,632 | 2019 | |
| 193. | Antigua and Barbuda | 8,077 | 2019 | |
| 220. | Anguilla | 1,180 | 2019 | |
| 53. | Angola | 2,138,372 | 2019 | |
| 205. | Andorra | 3,934 | 2019 | |
| 198. | American Samoa | 6,674 | 2019 | |
| 35. | Algeria | 3,085,278 | 2019 | |
| 131. | Albania | 275,012 | 2019 | |
| 30. | Afghanistan | 3,794,159 | 2019 |
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