The World: Population - Age 30-34 (2023) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 212. | British Virgin Islands | 3,526 | 2023 | |
| 6. | Brazil | 16,148,535 | 2023 | |
| 143. | Botswana | 210,631 | 2023 | |
| 129. | Bosnia and Herzegovina | 317,539 | 2023 | |
| 75. | Bolivia | 983,560 | 2023 | |
| 161. | Bhutan | 76,559 | 2023 | |
| 207. | Bermuda | 4,369 | 2023 | |
| 82. | Benin | 859,094 | 2023 | |
| 175. | Belize | 32,486 | 2023 | |
| 92. | Belgium | 666,482 | 2023 | |
| 89. | Belarus | 675,763 | 2023 | |
| 182. | Barbados | 20,794 | 2023 | |
| 7. | Bangladesh | 14,558,173 | 2023 | |
| 146. | Bahrain | 169,528 | 2023 | |
| 76. | Azerbaijan | 967,812 | 2023 | |
| 107. | Austria | 522,573 | 2023 | |
| 55. | Australia | 1,763,341 | 2023 | |
| 192. | Aruba | 8,207 | 2023 | |
| 131. | Armenia | 301,455 | 2023 | |
| 31. | Argentina | 3,353,679 | 2023 | |
| 195. | Antigua and Barbuda | 7,283 | 2023 | |
| 221. | Anguilla | 1,242 | 2023 | |
| 59. | Angola | 1,590,752 | 2023 | |
| 210. | Andorra | 3,911 | 2023 | |
| 198. | American Samoa | 6,510 | 2023 | |
| 30. | Algeria | 3,520,777 | 2023 | |
| 134. | Albania | 283,360 | 2023 | |
| 40. | Afghanistan | 2,854,711 | 2023 |
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