The World: Population - Age 0-4 (2021) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 28. | South Africa | 4,241,018 | 2021 | |
| 27. | Madagascar | 4,464,119 | 2021 | |
| 26. | Niger | 4,512,240 | 2021 | |
| 25. | Japan | 4,706,576 | 2021 | |
| 24. | Mozambique | 4,819,457 | 2021 | |
| 23. | Myanmar | 4,917,998 | 2021 | |
| 22. | Kenya | 5,210,233 | 2021 | |
| 21. | Afghanistan | 5,766,850 | 2021 | |
| 20. | Tanzania | 6,051,257 | 2021 | |
| 19. | Russia | 6,361,393 | 2021 | |
| 18. | Turkey | 6,509,179 | 2021 | |
| 17. | Iran | 6,853,948 | 2021 | |
| 16. | Vietnam | 7,152,605 | 2021 | |
| 15. | Sudan | 8,259,286 | 2021 | |
| 14. | Uganda | 9,713,373 | 2021 | |
| 13. | Egypt | 9,840,040 | 2021 | |
| 12. | Mexico | 10,383,654 | 2021 | |
| 11. | Democratic Republic of the Congo | 12,840,374 | 2021 | |
| 10. | Philippines | 12,982,141 | 2021 | |
| 9. | Brazil | 17,060,338 | 2021 | |
| 8. | Bangladesh | 17,152,912 | 2021 | |
| 7. | Indonesia | 20,524,096 | 2021 | |
| 6. | Pakistan | 21,053,992 | 2021 | |
| 5. | Ethiopia | 21,482,680 | 2021 | |
| 4. | United States of America | 22,506,398 | 2021 | |
| 3. | Nigeria | 33,565,992 | 2021 | |
| 2. | China | 77,232,272 | 2021 | |
| 1. | India | 116,153,152 | 2021 |
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