The World: Population - Age 45-49 (2021) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 1. | China | 108,519,544 | 2021 | |
| 2. | India | 83,596,360 | 2021 | |
| 3. | United States of America | 19,869,034 | 2021 | |
| 4. | Indonesia | 18,252,276 | 2021 | |
| 5. | Brazil | 14,921,264 | 2021 | |
| 6. | Bangladesh | 11,439,540 | 2021 | |
| 7. | Pakistan | 10,223,371 | 2021 | |
| 8. | Japan | 9,339,529 | 2021 | |
| 9. | Russia | 9,120,222 | 2021 | |
| 10. | Mexico | 8,162,583 | 2021 | |
| 11. | Nigeria | 7,828,676 | 2021 | |
| 12. | Vietnam | 6,578,637 | 2021 | |
| 13. | Philippines | 6,173,994 | 2021 | |
| 14. | Turkey | 5,789,727 | 2021 | |
| 15. | Iran | 5,540,345 | 2021 | |
| 16. | Thailand | 5,226,298 | 2021 | |
| 17. | Italy | 5,059,269 | 2021 | |
| 18. | Egypt | 4,772,724 | 2021 | |
| 19. | Germany | 4,768,796 | 2021 | |
| 20. | France | 4,414,267 | 2021 | |
| 21. | Spain | 4,394,221 | 2021 | |
| 22. | United Kingdom | 4,084,627 | 2021 | |
| 23. | Ethiopia | 3,969,196 | 2021 | |
| 24. | South Korea | 3,887,894 | 2021 | |
| 25. | Myanmar | 3,790,212 | 2021 | |
| 26. | Democratic Republic of the Congo | 3,268,503 | 2021 | |
| 27. | Ukraine | 3,060,250 | 2021 | |
| 28. | Colombia | 3,011,608 | 2021 | |
| 29. | Poland | 2,805,901 | 2021 | |
| 30. | Argentina | 2,742,617 | 2021 | |
| 31. | Algeria | 2,621,418 | 2021 | |
| 32. | Sudan | 2,284,930 | 2021 | |
| 33. | Canada | 2,259,425 | 2021 | |
| 34. | Morocco | 2,219,095 | 2021 | |
| 35. | South Africa | 2,103,208 | 2021 | |
| 36. | Malaysia | 2,053,397 | 2021 | |
| 37. | Kenya | 2,030,015 | 2021 | |
| 38. | Tanzania | 1,970,251 | 2021 | |
| 39. | Peru | 1,907,012 | 2021 | |
| 40. | Iraq | 1,884,322 | 2021 | |
| 41. | Venezuela | 1,865,917 | 2021 | |
| 42. | Uzbekistan | 1,838,493 | 2021 | |
| 43. | North Korea | 1,830,571 | 2021 | |
| 44. | Nepal | 1,793,669 | 2021 | |
| 45. | Romania | 1,771,291 | 2021 | |
| 46. | Taiwan | 1,746,898 | 2021 | |
| 47. | Saudi Arabia | 1,708,760 | 2021 | |
| 48. | Australia | 1,633,364 | 2021 | |
| 49. | Sri Lanka | 1,454,271 | 2021 | |
| 50. | Ghana | 1,440,694 | 2021 | |
| 51. | Afghanistan | 1,393,147 | 2021 | |
| 52. | Uganda | 1,270,944 | 2021 | |
| 53. | Syria | 1,255,143 | 2021 | |
| 54. | Kazakhstan | 1,166,029 | 2021 | |
| 55. | Chile | 1,133,826 | 2021 | |
| 56. | Cote d'Ivoire | 1,126,577 | 2021 | |
| 57. | Yemen | 1,115,583 | 2021 | |
| 58. | Netherlands | 1,087,364 | 2021 | |
| 59. | Madagascar | 1,068,883 | 2021 | |
| 60. | Ecuador | 965,320 | 2021 | |
| 61. | Cameroon | 913,979 | 2021 | |
| 62. | Cuba | 906,712 | 2021 | |
| 63. | Mozambique | 906,008 | 2021 | |
| 64. | Czech Republic | 883,882 | 2021 | |
| 65. | Portugal | 861,236 | 2021 | |
| 66. | Greece | 846,770 | 2021 | |
| 67. | Tunisia | 830,653 | 2021 | |
| 68. | Angola | 819,961 | 2021 | |
| 69. | Hungary | 806,912 | 2021 | |
| 70. | Burkina Faso | 796,983 | 2021 | |
| 71. | Cambodia | 766,124 | 2021 | |
| 72. | Niger | 700,635 | 2021 | |
| 73. | Guatemala | 699,215 | 2021 | |
| 74. | Belgium | 677,912 | 2021 | |
| 75. | Belarus | 672,610 | 2021 | |
| 76. | Malawi | 645,138 | 2021 | |
| 77. | Azerbaijan | 635,713 | 2021 | |
| 78. | Dominican Republic | 634,387 | 2021 | |
| 79. | Senegal | 587,816 | 2021 | |
| 80. | Bolivia | 586,213 | 2021 | |
| 81. | Sweden | 578,466 | 2021 | |
| 82. | Mali | 564,990 | 2021 | |
| 83. | Rwanda | 563,376 | 2021 | |
| 84. | Hong Kong | 554,852 | 2021 | |
| 85. | Zambia | 550,203 | 2021 | |
| 86. | Austria | 548,423 | 2021 | |
| 87. | Switzerland | 527,114 | 2021 | |
| 88. | Haiti | 517,357 | 2021 | |
| 89. | Guinea | 515,139 | 2021 | |
| 90. | Israel | 512,203 | 2021 | |
| 91. | Zimbabwe | 504,800 | 2021 | |
| 92. | Serbia | 503,036 | 2021 | |
| 93. | Bulgaria | 500,695 | 2021 | |
| 94. | Somalia | 482,283 | 2021 | |
| 95. | Libya | 479,275 | 2021 | |
| 96. | Benin | 468,890 | 2021 | |
| 97. | Burundi | 461,575 | 2021 | |
| 98. | Tajikistan | 455,727 | 2021 | |
| 99. | Honduras | 444,843 | 2021 | |
| 100. | Slovakia | 435,643 | 2021 |
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