The World: Population - Age 30-34 (2021) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 42. | Afghanistan | 2,617,215 | 2021 | |
| 134. | Albania | 279,699 | 2021 | |
| 29. | Algeria | 3,536,187 | 2021 | |
| 200. | American Samoa | 5,740 | 2021 | |
| 209. | Andorra | 3,823 | 2021 | |
| 61. | Angola | 1,485,676 | 2021 | |
| 221. | Anguilla | 1,278 | 2021 | |
| 196. | Antigua and Barbuda | 7,008 | 2021 | |
| 32. | Argentina | 3,329,617 | 2021 | |
| 131. | Armenia | 305,335 | 2021 | |
| 192. | Aruba | 8,038 | 2021 | |
| 55. | Australia | 1,721,317 | 2021 | |
| 106. | Austria | 514,670 | 2021 | |
| 75. | Azerbaijan | 960,430 | 2021 | |
| 149. | Bahrain | 165,345 | 2021 | |
| 7. | Bangladesh | 14,005,106 | 2021 | |
| 182. | Barbados | 20,158 | 2021 | |
| 88. | Belarus | 747,827 | 2021 | |
| 92. | Belgium | 657,057 | 2021 | |
| 175. | Belize | 31,138 | 2021 | |
| 86. | Benin | 804,586 | 2021 | |
| 206. | Bermuda | 4,243 | 2021 | |
| 161. | Bhutan | 76,952 | 2021 | |
| 76. | Bolivia | 959,797 | 2021 | |
| 126. | Bosnia and Herzegovina | 333,896 | 2021 | |
| 143. | Botswana | 207,110 | 2021 | |
| 6. | Brazil | 16,678,329 | 2021 | |
| 212. | British Virgin Islands | 3,406 | 2021 | |
| 172. | Brunei | 44,833 | 2021 | |
| 114. | Bulgaria | 433,851 | 2021 | |
| 62. | Burkina Faso | 1,432,911 | 2021 | |
| 79. | Burundi | 888,409 | 2021 | |
| 57. | Cambodia | 1,629,330 | 2021 | |
| 54. | Cameroon | 1,801,406 | 2021 | |
| 44. | Canada | 2,444,977 | 2021 | |
| 168. | Cape Verde | 51,639 | 2021 | |
| 207. | Cayman Islands | 4,137 | 2021 | |
| 112. | Central African Republic | 447,972 | 2021 | |
| 80. | Chad | 871,247 | 2021 | |
| 191. | Channel Islands | 8,694 | 2021 | |
| 63. | Chile | 1,422,352 | 2021 | |
| 1. | China | 121,723,480 | 2021 | |
| 26. | Colombia | 3,968,227 | 2021 | |
| 163. | Comoros | 58,451 | 2021 | |
| 225. | Cook Islands | 454 | 2021 | |
| 115. | Costa Rica | 433,271 | 2021 | |
| 50. | Cote d'Ivoire | 2,045,729 | 2021 | |
| 136. | Croatia | 278,829 | 2021 | |
| 84. | Cuba | 818,326 | 2021 | |
| 156. | Cyprus | 107,908 | 2021 | |
| 91. | Czech Republic | 657,490 | 2021 | |
| 17. | Democratic Republic of the Congo | 6,414,681 | 2021 | |
| 123. | Denmark | 345,297 | 2021 | |
| 160. | Djibouti | 86,884 | 2021 | |
| 201. | Dominica | 5,498 | 2021 | |
| 81. | Dominican Republic | 856,754 | 2021 | |
| 154. | East Timor | 125,883 | 2021 | |
| 67. | Ecuador | 1,342,873 | 2021 | |
| 15. | Egypt | 7,499,356 | 2021 | |
| 109. | El Salvador | 499,073 | 2021 | |
| 164. | Equatorial Guinea | 58,165 | 2021 | |
| 107. | Eritrea | 509,493 | 2021 | |
| 159. | Estonia | 90,531 | 2021 | |
| 14. | Ethiopia | 7,885,786 | 2021 | |
| 210. | Faroe Islands | 3,817 | 2021 | |
| 193. | Federated States of Micronesia | 7,934 | 2021 | |
| 162. | Fiji | 71,164 | 2021 | |
| 127. | Finland | 322,440 | 2021 | |
| 24. | France | 4,159,865 | 2021 | |
| 178. | French Polynesia | 24,907 | 2021 | |
| 153. | Gabon | 128,267 | 2021 | |
| 148. | Gaza Strip | 167,172 | 2021 | |
| 120. | Georgia | 350,948 | 2021 | |
| 19. | Germany | 5,113,733 | 2021 | |
| 45. | Ghana | 2,434,767 | 2021 | |
| 216. | Gibraltar | 2,320 | 2021 | |
| 98. | Greece | 612,028 | 2021 | |
| 205. | Greenland | 4,441 | 2021 | |
| 190. | Grenada | 9,193 | 2021 | |
| 184. | Guam | 14,554 | 2021 | |
| 66. | Guatemala | 1,346,688 | 2021 | |
| 204. | Guernsey | 4,517 | 2021 | |
| 77. | Guinea | 893,456 | 2021 | |
| 151. | Guinea-Bissau | 137,884 | 2021 | |
| 165. | Guyana | 55,867 | 2021 | |
| 78. | Haiti | 891,296 | 2021 | |
| 87. | Honduras | 776,596 | 2021 | |
| 113. | Hong Kong | 443,145 | 2021 | |
| 96. | Hungary | 624,817 | 2021 | |
| 179. | Iceland | 23,043 | 2021 | |
| 2. | India | 103,345,104 | 2021 | |
| 4. | Indonesia | 20,010,960 | 2021 | |
| 11. | Iran | 9,219,812 | 2021 | |
| 39. | Iraq | 2,904,501 | 2021 | |
| 125. | Ireland | 334,481 | 2021 | |
| 202. | Isle of Man | 5,263 | 2021 | |
| 100. | Israel | 584,514 | 2021 | |
| 30. | Italy | 3,532,437 | 2021 | |
| 138. | Jamaica | 266,328 | 2021 | |
| 18. | Japan | 6,358,749 | 2021 |
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