The World: Population - Age 25-29 (2015) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 42. | Afghanistan | 2,575,224 | 2015 | |
| 136. | Albania | 280,401 | 2015 | |
| 29. | Algeria | 3,599,295 | 2015 | |
| 201. | American Samoa | 5,528 | 2015 | |
| 208. | Andorra | 3,859 | 2015 | |
| 62. | Angola | 1,481,883 | 2015 | |
| 221. | Anguilla | 1,212 | 2015 | |
| 197. | Antigua and Barbuda | 6,734 | 2015 | |
| 32. | Argentina | 3,309,142 | 2015 | |
| 130. | Armenia | 305,124 | 2015 | |
| 195. | Aruba | 7,468 | 2015 | |
| 58. | Australia | 1,622,142 | 2015 | |
| 107. | Austria | 505,153 | 2015 | |
| 75. | Azerbaijan | 949,237 | 2015 | |
| 153. | Bahrain | 139,885 | 2015 | |
| 8. | Bangladesh | 13,336,738 | 2015 | |
| 182. | Barbados | 20,172 | 2015 | |
| 87. | Belarus | 784,341 | 2015 | |
| 92. | Belgium | 638,585 | 2015 | |
| 175. | Belize | 31,210 | 2015 | |
| 86. | Benin | 796,141 | 2015 | |
| 206. | Bermuda | 4,173 | 2015 | |
| 161. | Bhutan | 77,030 | 2015 | |
| 74. | Bolivia | 963,621 | 2015 | |
| 123. | Bosnia and Herzegovina | 334,409 | 2015 | |
| 143. | Botswana | 219,471 | 2015 | |
| 6. | Brazil | 17,119,016 | 2015 | |
| 212. | British Virgin Islands | 2,859 | 2015 | |
| 173. | Brunei | 42,438 | 2015 | |
| 112. | Bulgaria | 464,225 | 2015 | |
| 64. | Burkina Faso | 1,425,033 | 2015 | |
| 80. | Burundi | 882,824 | 2015 | |
| 57. | Cambodia | 1,623,074 | 2015 | |
| 53. | Cameroon | 1,841,782 | 2015 | |
| 46. | Canada | 2,346,477 | 2015 | |
| 166. | Cape Verde | 52,321 | 2015 | |
| 210. | Cayman Islands | 3,428 | 2015 | |
| 113. | Central African Republic | 455,504 | 2015 | |
| 77. | Chad | 908,360 | 2015 | |
| 192. | Channel Islands | 8,672 | 2015 | |
| 65. | Chile | 1,390,938 | 2015 | |
| 1. | China | 122,571,896 | 2015 | |
| 27. | Colombia | 3,944,003 | 2015 | |
| 163. | Comoros | 59,510 | 2015 | |
| 224. | Cook Islands | 552 | 2015 | |
| 114. | Costa Rica | 434,958 | 2015 | |
| 50. | Cote d'Ivoire | 2,056,880 | 2015 | |
| 135. | Croatia | 283,014 | 2015 | |
| 83. | Cuba | 828,979 | 2015 | |
| 157. | Cyprus | 104,736 | 2015 | |
| 89. | Czech Republic | 656,044 | 2015 | |
| 18. | Democratic Republic of the Congo | 6,334,693 | 2015 | |
| 124. | Denmark | 332,238 | 2015 | |
| 160. | Djibouti | 81,338 | 2015 | |
| 200. | Dominica | 5,873 | 2015 | |
| 81. | Dominican Republic | 863,011 | 2015 | |
| 155. | East Timor | 124,806 | 2015 | |
| 66. | Ecuador | 1,339,092 | 2015 | |
| 15. | Egypt | 7,607,129 | 2015 | |
| 106. | El Salvador | 517,150 | 2015 | |
| 164. | Equatorial Guinea | 57,084 | 2015 | |
| 108. | Eritrea | 505,022 | 2015 | |
| 158. | Estonia | 97,321 | 2015 | |
| 14. | Ethiopia | 7,883,331 | 2015 | |
| 209. | Faroe Islands | 3,576 | 2015 | |
| 191. | Federated States of Micronesia | 8,750 | 2015 | |
| 162. | Fiji | 73,621 | 2015 | |
| 128. | Finland | 318,951 | 2015 | |
| 24. | France | 4,102,468 | 2015 | |
| 178. | French Polynesia | 24,330 | 2015 | |
| 152. | Gabon | 140,111 | 2015 | |
| 148. | Gaza Strip | 157,959 | 2015 | |
| 119. | Georgia | 362,607 | 2015 | |
| 19. | Germany | 5,048,066 | 2015 | |
| 44. | Ghana | 2,432,240 | 2015 | |
| 215. | Gibraltar | 2,313 | 2015 | |
| 98. | Greece | 604,786 | 2015 | |
| 204. | Greenland | 4,435 | 2015 | |
| 190. | Grenada | 9,876 | 2015 | |
| 185. | Guam | 14,235 | 2015 | |
| 67. | Guatemala | 1,333,350 | 2015 | |
| 203. | Guernsey | 4,436 | 2015 | |
| 79. | Guinea | 891,634 | 2015 | |
| 151. | Guinea-Bissau | 141,895 | 2015 | |
| 165. | Guyana | 56,213 | 2015 | |
| 78. | Haiti | 901,364 | 2015 | |
| 88. | Honduras | 782,727 | 2015 | |
| 115. | Hong Kong | 433,525 | 2015 | |
| 94. | Hungary | 624,728 | 2015 | |
| 180. | Iceland | 22,267 | 2015 | |
| 2. | India | 103,352,808 | 2015 | |
| 4. | Indonesia | 20,237,752 | 2015 | |
| 11. | Iran | 9,228,412 | 2015 | |
| 38. | Iraq | 2,920,266 | 2015 | |
| 127. | Ireland | 322,224 | 2015 | |
| 202. | Isle of Man | 4,944 | 2015 | |
| 100. | Israel | 577,470 | 2015 | |
| 31. | Italy | 3,366,256 | 2015 | |
| 137. | Jamaica | 277,331 | 2015 | |
| 17. | Japan | 6,542,587 | 2015 |
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