The World: Population - Age 20-24 (2018) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 28. | United Kingdom | 4,058,128 | 2018 | |
| 27. | Uganda | 4,158,131 | 2018 | |
| 26. | Colombia | 4,160,070 | 2018 | |
| 25. | Kenya | 4,201,870 | 2018 | |
| 24. | Germany | 4,202,753 | 2018 | |
| 23. | South Africa | 4,680,902 | 2018 | |
| 22. | Myanmar | 5,038,158 | 2018 | |
| 21. | Tanzania | 5,062,319 | 2018 | |
| 20. | Thailand | 5,085,845 | 2018 | |
| 19. | Sudan | 5,128,805 | 2018 | |
| 18. | Japan | 6,204,186 | 2018 | |
| 17. | Russia | 6,575,167 | 2018 | |
| 16. | Iran | 6,771,424 | 2018 | |
| 15. | Turkey | 6,848,319 | 2018 | |
| 14. | Egypt | 7,769,449 | 2018 | |
| 13. | Vietnam | 7,936,976 | 2018 | |
| 12. | Democratic Republic of the Congo | 8,618,110 | 2018 | |
| 11. | Ethiopia | 9,780,538 | 2018 | |
| 10. | Mexico | 10,306,384 | 2018 | |
| 9. | Philippines | 10,392,007 | 2018 | |
| 8. | Bangladesh | 15,771,320 | 2018 | |
| 7. | Brazil | 16,969,940 | 2018 | |
| 6. | Nigeria | 17,726,668 | 2018 | |
| 5. | Pakistan | 21,406,384 | 2018 | |
| 4. | United States of America | 21,447,494 | 2018 | |
| 3. | Indonesia | 21,941,460 | 2018 | |
| 2. | China | 93,559,320 | 2018 | |
| 1. | India | 113,834,752 | 2018 |
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