The World: Population - Age 25-29 (2018) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 128. | Mauritania | 311,922 | 2018 | |
| 127. | Bosnia and Herzegovina | 318,363 | 2018 | |
| 126. | Norway | 322,330 | 2018 | |
| 125. | Mongolia | 322,703 | 2018 | |
| 124. | Qatar | 326,050 | 2018 | |
| 123. | Finland | 331,444 | 2018 | |
| 122. | Kuwait | 335,932 | 2018 | |
| 121. | Georgia | 346,892 | 2018 | |
| 120. | Lebanon | 355,880 | 2018 | |
| 119. | Denmark | 363,375 | 2018 | |
| 118. | Oman | 366,556 | 2018 | |
| 117. | Slovakia | 382,940 | 2018 | |
| 116. | Bulgaria | 401,890 | 2018 | |
| 115. | Republic of Congo | 409,712 | 2018 | |
| 114. | Hong Kong | 426,965 | 2018 | |
| 113. | Costa Rica | 430,502 | 2018 | |
| 112. | Serbia | 443,310 | 2018 | |
| 111. | Central African Republic | 483,622 | 2018 | |
| 110. | Sierra Leone | 491,215 | 2018 | |
| 109. | Switzerland | 498,786 | 2018 | |
| 108. | Austria | 515,410 | 2018 | |
| 107. | Turkmenistan | 532,740 | 2018 | |
| 106. | El Salvador | 549,837 | 2018 | |
| 105. | Eritrea | 561,253 | 2018 | |
| 104. | Greece | 572,565 | 2018 | |
| 103. | Kyrgyzstan | 575,658 | 2018 | |
| 102. | Papua New Guinea | 576,909 | 2018 | |
| 101. | Jordan | 583,790 | 2018 | |
| 100. | Israel | 593,917 | 2018 | |
| 99. | Libya | 602,412 | 2018 | |
| 98. | Nicaragua | 610,245 | 2018 | |
| 97. | Hungary | 621,182 | 2018 | |
| 96. | Czech Republic | 638,660 | 2018 | |
| 95. | Portugal | 641,181 | 2018 | |
| 94. | Singapore | 656,142 | 2018 | |
| 93. | Belgium | 656,929 | 2018 | |
| 92. | Paraguay | 659,707 | 2018 | |
| 91. | Sweden | 663,953 | 2018 | |
| 90. | Laos | 671,026 | 2018 | |
| 89. | Belarus | 680,725 | 2018 | |
| 88. | Togo | 681,322 | 2018 | |
| 87. | Cuba | 801,584 | 2018 | |
| 86. | Tajikistan | 825,194 | 2018 | |
| 85. | Honduras | 831,104 | 2018 | |
| 84. | Tunisia | 864,480 | 2018 | |
| 83. | Somalia | 868,038 | 2018 | |
| 82. | Benin | 875,446 | 2018 | |
| 81. | United Arab Emirates | 895,099 | 2018 | |
| 80. | Dominican Republic | 896,014 | 2018 | |
| 79. | Burundi | 949,556 | 2018 | |
| 78. | Haiti | 965,413 | 2018 | |
| 77. | Guinea | 969,712 | 2018 | |
| 76. | Chad | 969,804 | 2018 | |
| 75. | Azerbaijan | 972,155 | 2018 | |
| 74. | Bolivia | 996,126 | 2018 | |
| 73. | Rwanda | 1,094,213 | 2018 | |
| 72. | Netherlands | 1,101,066 | 2018 | |
| 71. | Senegal | 1,223,020 | 2018 | |
| 70. | Mali | 1,243,991 | 2018 | |
| 69. | Zambia | 1,301,227 | 2018 | |
| 68. | Ecuador | 1,379,317 | 2018 | |
| 67. | Romania | 1,413,484 | 2018 | |
| 66. | Niger | 1,442,689 | 2018 | |
| 65. | Chile | 1,454,817 | 2018 | |
| 64. | Guatemala | 1,462,521 | 2018 | |
| 63. | Zimbabwe | 1,471,610 | 2018 | |
| 62. | Malawi | 1,553,682 | 2018 | |
| 61. | Taiwan | 1,578,587 | 2018 | |
| 60. | Burkina Faso | 1,584,724 | 2018 | |
| 59. | Sri Lanka | 1,624,133 | 2018 | |
| 58. | Kazakhstan | 1,631,758 | 2018 | |
| 57. | Angola | 1,635,284 | 2018 | |
| 56. | Australia | 1,690,376 | 2018 | |
| 55. | Cambodia | 1,691,774 | 2018 | |
| 54. | Cameroon | 1,952,221 | 2018 | |
| 53. | North Korea | 2,024,896 | 2018 | |
| 52. | Madagascar | 2,120,818 | 2018 | |
| 51. | Mozambique | 2,184,193 | 2018 | |
| 50. | Syria | 2,190,975 | 2018 | |
| 49. | Cote d'Ivoire | 2,192,384 | 2018 | |
| 48. | Canada | 2,427,946 | 2018 | |
| 47. | Malaysia | 2,433,853 | 2018 | |
| 46. | Yemen | 2,475,794 | 2018 | |
| 45. | Ghana | 2,558,181 | 2018 | |
| 44. | Poland | 2,568,346 | 2018 | |
| 43. | Venezuela | 2,584,205 | 2018 | |
| 42. | Spain | 2,682,410 | 2018 | |
| 41. | Peru | 2,750,055 | 2018 | |
| 40. | Morocco | 2,816,149 | 2018 | |
| 39. | Iraq | 2,939,056 | 2018 | |
| 38. | Afghanistan | 2,942,985 | 2018 | |
| 37. | Ukraine | 3,035,343 | 2018 | |
| 36. | Saudi Arabia | 3,048,325 | 2018 | |
| 35. | Uzbekistan | 3,102,156 | 2018 | |
| 34. | Nepal | 3,231,241 | 2018 | |
| 33. | South Korea | 3,263,887 | 2018 | |
| 32. | Argentina | 3,365,923 | 2018 | |
| 31. | Italy | 3,373,951 | 2018 | |
| 30. | Uganda | 3,399,103 | 2018 | |
| 29. | Algeria | 3,549,978 | 2018 |
