The World: Population - Age 45-49 (1981) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 1. | United States of America | 10,984,904 | 1981 | |
| 2. | Indonesia | 6,626,584 | 1981 | |
| 3. | Brazil | 4,903,391 | 1981 | |
| 4. | Pakistan | 3,439,069 | 1981 | |
| 5. | Bangladesh | 3,154,501 | 1981 | |
| 6. | Nigeria | 2,679,394 | 1981 | |
| 7. | Mexico | 2,391,676 | 1981 | |
| 8. | Turkey | 2,016,809 | 1981 | |
| 9. | Philippines | 1,815,249 | 1981 | |
| 10. | Argentina | 1,536,635 | 1981 | |
| 11. | Myanmar | 1,355,455 | 1981 | |
| 12. | Ethiopia | 1,342,613 | 1981 | |
| 13. | Democratic Republic of the Congo | 1,043,752 | 1981 | |
| 14. | Colombia | 973,827 | 1981 | |
| 15. | Peru | 680,878 | 1981 | |
| 16. | Nepal | 638,950 | 1981 | |
| 17. | Tanzania | 637,710 | 1981 | |
| 18. | Sri Lanka | 622,353 | 1981 | |
| 19. | Serbia | 597,783 | 1981 | |
| 20. | Malaysia | 519,052 | 1981 | |
| 21. | Afghanistan | 480,873 | 1981 | |
| 22. | Kenya | 468,945 | 1981 | |
| 23. | Mozambique | 442,159 | 1981 | |
| 24. | Uganda | 403,836 | 1981 | |
| 25. | Ghana | 397,150 | 1981 | |
| 26. | Madagascar | 311,624 | 1981 | |
| 27. | Cameroon | 307,084 | 1981 | |
| 28. | Cote d'Ivoire | 304,383 | 1981 | |
| 29. | Syria | 284,075 | 1981 | |
| 30. | Angola | 259,148 | 1981 | |
| 31. | Cambodia | 252,986 | 1981 | |
| 32. | Mali | 243,112 | 1981 | |
| 33. | Haiti | 221,786 | 1981 | |
| 34. | Burkina Faso | 221,501 | 1981 | |
| 35. | Guatemala | 216,475 | 1981 | |
| 36. | Niger | 216,156 | 1981 | |
| 37. | Malawi | 213,625 | 1981 | |
| 38. | Dominican Republic | 201,404 | 1981 | |
| 39. | Somalia | 191,404 | 1981 | |
| 40. | Senegal | 185,416 | 1981 | |
| 41. | Zambia | 177,590 | 1981 | |
| 42. | Guinea | 172,212 | 1981 | |
| 43. | Rwanda | 167,223 | 1981 | |
| 44. | Chad | 163,864 | 1981 | |
| 45. | Burundi | 143,691 | 1981 | |
| 46. | Sierra Leone | 139,956 | 1981 | |
| 47. | Benin | 111,260 | 1981 | |
| 48. | Lebanon | 111,200 | 1981 | |
| 49. | Libya | 110,302 | 1981 | |
| 50. | Paraguay | 110,154 | 1981 | |
| 51. | Honduras | 107,542 | 1981 | |
| 52. | Central African Republic | 107,245 | 1981 | |
| 53. | Papua New Guinea | 100,134 | 1981 | |
| 54. | Eritrea | 95,404 | 1981 | |
| 55. | Nicaragua | 88,283 | 1981 | |
| 56. | Togo | 86,363 | 1981 | |
| 57. | Jordan | 74,917 | 1981 | |
| 58. | Panama | 73,833 | 1981 | |
| 59. | Liberia | 71,219 | 1981 | |
| 60. | Republic of Congo | 63,328 | 1981 | |
| 61. | Kosovo | 62,860 | 1981 | |
| 62. | Mauritania | 58,339 | 1981 | |
| 63. | Lesotho | 54,514 | 1981 | |
| 64. | Trinidad and Tobago | 40,924 | 1981 | |
| 65. | Namibia | 36,497 | 1981 | |
| 66. | Gabon | 31,204 | 1981 | |
| 67. | Botswana | 29,364 | 1981 | |
| 68. | Guinea-Bissau | 28,246 | 1981 | |
| 69. | Guyana | 24,760 | 1981 | |
| 70. | Swaziland | 20,411 | 1981 | |
| 71. | Bhutan | 20,245 | 1981 | |
| 72. | Suriname | 14,142 | 1981 | |
| 73. | Bahrain | 13,492 | 1981 | |
| 74. | Djibouti | 12,833 | 1981 | |
| 75. | Comoros | 11,654 | 1981 | |
| 76. | Cape Verde | 10,909 | 1981 | |
| 77. | Barbados | 9,201 | 1981 | |
| 78. | The Bahamas | 8,110 | 1981 | |
| 79. | Solomon Islands | 7,806 | 1981 | |
| 80. | Brunei | 6,567 | 1981 | |
| 81. | Samoa | 5,187 | 1981 | |
| 82. | Western Sahara | 4,858 | 1981 | |
| 83. | Belize | 4,645 | 1981 | |
| 84. | Vanuatu | 3,882 | 1981 | |
| 85. | Sao Tome and Principe | 3,646 | 1981 | |
| 86. | Saint Lucia | 3,637 | 1981 | |
| 87. | Aruba | 3,338 | 1981 | |
| 88. | Grenada | 2,902 | 1981 | |
| 89. | Seychelles | 2,604 | 1981 | |
| 90. | Dominica | 2,314 | 1981 | |
| 91. | Saint Kitts and Nevis | 1,233 | 1981 | |
| 92. | Tuvalu | 329 | 1981 |
