The World: Population - Age 30-34 (2018) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 47. | Afghanistan | 2,230,438 | 2018 | |
| 137. | Albania | 255,889 | 2018 | |
| 29. | Algeria | 3,624,430 | 2018 | |
| 202. | American Samoa | 5,013 | 2018 | |
| 205. | Andorra | 4,204 | 2018 | |
| 62. | Angola | 1,355,901 | 2018 | |
| 220. | Anguilla | 1,227 | 2018 | |
| 197. | Antigua and Barbuda | 6,789 | 2018 | |
| 32. | Argentina | 3,238,590 | 2018 | |
| 131. | Armenia | 295,509 | 2018 | |
| 191. | Aruba | 8,166 | 2018 | |
| 54. | Australia | 1,671,966 | 2018 | |
| 102. | Austria | 512,074 | 2018 | |
| 77. | Azerbaijan | 903,007 | 2018 | |
| 147. | Bahrain | 162,558 | 2018 | |
| 7. | Bangladesh | 13,025,889 | 2018 | |
| 182. | Barbados | 20,334 | 2018 | |
| 83. | Belarus | 811,222 | 2018 | |
| 92. | Belgium | 634,603 | 2018 | |
| 175. | Belize | 28,805 | 2018 | |
| 86. | Benin | 737,774 | 2018 | |
| 206. | Bermuda | 4,203 | 2018 | |
| 161. | Bhutan | 74,091 | 2018 | |
| 75. | Bolivia | 922,210 | 2018 | |
| 124. | Bosnia and Herzegovina | 325,464 | 2018 | |
| 143. | Botswana | 201,738 | 2018 | |
| 5. | Brazil | 16,934,970 | 2018 | |
| 212. | British Virgin Islands | 3,103 | 2018 | |
| 172. | Brunei | 43,899 | 2018 | |
| 110. | Bulgaria | 469,036 | 2018 | |
| 65. | Burkina Faso | 1,293,697 | 2018 | |
| 82. | Burundi | 811,917 | 2018 | |
| 59. | Cambodia | 1,520,953 | 2018 | |
| 55. | Cameroon | 1,669,384 | 2018 | |
| 43. | Canada | 2,382,491 | 2018 | |
| 170. | Cape Verde | 48,393 | 2018 | |
| 209. | Cayman Islands | 3,749 | 2018 | |
| 116. | Central African Republic | 410,814 | 2018 | |
| 79. | Chad | 819,530 | 2018 | |
| 194. | Channel Islands | 7,926 | 2018 | |
| 63. | Chile | 1,311,612 | 2018 | |
| 1. | China | 110,274,776 | 2018 | |
| 26. | Colombia | 3,748,757 | 2018 | |
| 163. | Comoros | 56,726 | 2018 | |
| 227. | Cook Islands | 434 | 2018 | |
| 113. | Costa Rica | 429,332 | 2018 | |
| 50. | Cote d'Ivoire | 1,866,092 | 2018 | |
| 130. | Croatia | 298,476 | 2018 | |
| 84. | Cuba | 782,536 | 2018 | |
| 157. | Cyprus | 106,153 | 2018 | |
| 90. | Czech Republic | 673,237 | 2018 | |
| 18. | Democratic Republic of the Congo | 5,713,202 | 2018 | |
| 128. | Denmark | 315,323 | 2018 | |
| 160. | Djibouti | 75,042 | 2018 | |
| 200. | Dominica | 5,556 | 2018 | |
| 80. | Dominican Republic | 819,458 | 2018 | |
| 155. | East Timor | 117,716 | 2018 | |
| 66. | Ecuador | 1,289,133 | 2018 | |
| 14. | Egypt | 7,740,300 | 2018 | |
| 112. | El Salvador | 467,078 | 2018 | |
| 165. | Equatorial Guinea | 52,980 | 2018 | |
| 111. | Eritrea | 468,545 | 2018 | |
| 158. | Estonia | 93,684 | 2018 | |
| 15. | Ethiopia | 7,109,834 | 2018 | |
| 213. | Faroe Islands | 2,882 | 2018 | |
| 192. | Federated States of Micronesia | 8,141 | 2018 | |
| 162. | Fiji | 72,927 | 2018 | |
| 127. | Finland | 320,975 | 2018 | |
| 24. | France | 4,136,442 | 2018 | |
| 178. | French Polynesia | 23,903 | 2018 | |
| 154. | Gabon | 120,255 | 2018 | |
| 150. | Gaza Strip | 136,710 | 2018 | |
| 120. | Georgia | 352,736 | 2018 | |
| 19. | Germany | 4,975,469 | 2018 | |
| 46. | Ghana | 2,261,832 | 2018 | |
| 215. | Gibraltar | 2,199 | 2018 | |
| 91. | Greece | 666,762 | 2018 | |
| 207. | Greenland | 3,994 | 2018 | |
| 189. | Grenada | 9,873 | 2018 | |
| 185. | Guam | 13,377 | 2018 | |
| 67. | Guatemala | 1,197,963 | 2018 | |
| 204. | Guernsey | 4,390 | 2018 | |
| 81. | Guinea | 818,164 | 2018 | |
| 152. | Guinea-Bissau | 128,830 | 2018 | |
| 168. | Guyana | 49,490 | 2018 | |
| 78. | Haiti | 825,919 | 2018 | |
| 87. | Honduras | 726,175 | 2018 | |
| 109. | Hong Kong | 471,506 | 2018 | |
| 94. | Hungary | 622,471 | 2018 | |
| 180. | Iceland | 21,416 | 2018 | |
| 2. | India | 100,604,808 | 2018 | |
| 4. | Indonesia | 19,960,100 | 2018 | |
| 11. | Iran | 8,962,429 | 2018 | |
| 39. | Iraq | 2,832,504 | 2018 | |
| 118. | Ireland | 361,418 | 2018 | |
| 203. | Isle of Man | 4,913 | 2018 | |
| 99. | Israel | 574,334 | 2018 | |
| 31. | Italy | 3,602,543 | 2018 | |
| 139. | Jamaica | 244,732 | 2018 | |
| 16. | Japan | 6,989,458 | 2018 |
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