The World: Population - Age 30-34 (2025) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 212. | British Virgin Islands | 3,518 | 2025 (Est.) | |
| 6. | Brazil | 16,094,808 | 2025 (Est.) | |
| 143. | Botswana | 211,571 | 2025 (Est.) | |
| 134. | Bosnia and Herzegovina | 282,310 | 2025 (Est.) | |
| 76. | Bolivia | 1,006,090 | 2025 (Est.) | |
| 159. | Bhutan | 74,175 | 2025 (Est.) | |
| 206. | Bermuda | 4,399 | 2025 (Est.) | |
| 80. | Benin | 927,074 | 2025 (Est.) | |
| 175. | Belize | 33,630 | 2025 (Est.) | |
| 92. | Belgium | 652,650 | 2025 (Est.) | |
| 100. | Belarus | 593,878 | 2025 (Est.) | |
| 182. | Barbados | 20,062 | 2025 (Est.) | |
| 8. | Bangladesh | 15,064,889 | 2025 (Est.) | |
| 146. | Bahrain | 174,632 | 2025 (Est.) | |
| 81. | Azerbaijan | 923,565 | 2025 (Est.) | |
| 108. | Austria | 523,955 | 2025 (Est.) | |
| 55. | Australia | 1,779,346 | 2025 (Est.) | |
| 191. | Aruba | 8,440 | 2025 (Est.) | |
| 137. | Armenia | 270,483 | 2025 (Est.) | |
| 34. | Argentina | 3,345,417 | 2025 (Est.) | |
| 195. | Antigua and Barbuda | 7,575 | 2025 (Est.) | |
| 220. | Anguilla | 1,227 | 2025 (Est.) | |
| 56. | Angola | 1,725,571 | 2025 (Est.) | |
| 209. | Andorra | 3,918 | 2025 (Est.) | |
| 198. | American Samoa | 7,055 | 2025 (Est.) | |
| 29. | Algeria | 3,536,474 | 2025 (Est.) | |
| 135. | Albania | 279,572 | 2025 (Est.) | |
| 36. | Afghanistan | 3,088,063 | 2025 (Est.) |
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