The World: Population - Age 0-4 (2025) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 214. | British Virgin Islands | 2,343 | 2025 (Est.) | |
| 9. | Brazil | 16,808,712 | 2025 (Est.) | |
| 136. | Botswana | 230,033 | 2025 (Est.) | |
| 144. | Bosnia and Herzegovina | 183,413 | 2025 (Est.) | |
| 76. | Bolivia | 1,165,663 | 2025 (Est.) | |
| 164. | Bhutan | 60,888 | 2025 (Est.) | |
| 204. | Bermuda | 4,011 | 2025 (Est.) | |
| 64. | Benin | 1,950,524 | 2025 (Est.) | |
| 170. | Belize | 42,525 | 2025 (Est.) | |
| 103. | Belgium | 511,933 | 2025 (Est.) | |
| 112. | Belarus | 374,039 | 2025 (Est.) | |
| 186. | Barbados | 16,113 | 2025 (Est.) | |
| 8. | Bangladesh | 17,322,464 | 2025 (Est.) | |
| 155. | Bahrain | 96,468 | 2025 (Est.) | |
| 96. | Azerbaijan | 681,736 | 2025 (Est.) | |
| 115. | Austria | 361,732 | 2025 (Est.) | |
| 72. | Australia | 1,451,323 | 2025 (Est.) | |
| 196. | Aruba | 7,200 | 2025 (Est.) | |
| 147. | Armenia | 154,509 | 2025 (Est.) | |
| 38. | Argentina | 3,459,997 | 2025 (Est.) | |
| 195. | Antigua and Barbuda | 7,682 | 2025 (Est.) | |
| 218. | Anguilla | 1,370 | 2025 (Est.) | |
| 31. | Angola | 4,059,682 | 2025 (Est.) | |
| 211. | Andorra | 2,933 | 2025 (Est.) | |
| 194. | American Samoa | 7,723 | 2025 (Est.) | |
| 49. | Algeria | 2,712,430 | 2025 (Est.) | |
| 143. | Albania | 191,787 | 2025 (Est.) | |
| 19. | Afghanistan | 6,055,219 | 2025 (Est.) |
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