The World: Population - Age 20-24 (2021) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 178. | Mayotte | 23,335 | 2021 | |
| 154. | Mauritius | 97,305 | 2021 | |
| 116. | Mauritania | 379,105 | 2021 | |
| 196. | Marshall Islands | 7,242 | 2021 | |
| 179. | Malta | 23,268 | 2021 | |
| 59. | Mali | 1,707,173 | 2021 | |
| 172. | Maldives | 35,942 | 2021 | |
| 44. | Malaysia | 2,648,623 | 2021 | |
| 55. | Malawi | 2,004,480 | 2021 | |
| 45. | Madagascar | 2,647,511 | 2021 | |
| 151. | Macedonia | 138,570 | 2021 | |
| 174. | Macau | 31,389 | 2021 | |
| 173. | Luxembourg | 35,874 | 2021 | |
| 148. | Lithuania | 172,715 | 2021 | |
| 214. | Liechtenstein | 2,334 | 2021 | |
| 92. | Libya | 651,869 | 2021 | |
| 108. | Liberia | 480,092 | 2021 | |
| 145. | Lesotho | 183,965 | 2021 | |
| 124. | Lebanon | 305,591 | 2021 | |
| 157. | Latvia | 87,388 | 2021 | |
| 85. | Laos | 767,326 | 2021 | |
| 106. | Kyrgyzstan | 490,384 | 2021 | |
| 132. | Kuwait | 260,495 | 2021 | |
| 149. | Kosovo | 165,362 | 2021 | |
| 187. | Kiribati | 11,711 | 2021 | |
| 22. | Kenya | 4,647,753 | 2021 | |
| 74. | Kazakhstan | 1,190,738 | 2021 | |
| 94. | Jordan | 637,752 | 2021 | |
| 17. | Japan | 6,081,054 | 2021 | |
| 125. | Jamaica | 305,450 | 2021 | |
| 36. | Italy | 3,041,512 | 2021 | |
| 91. | Israel | 662,560 | 2021 | |
| 201. | Isle of Man | 5,070 | 2021 | |
| 122. | Ireland | 308,777 | 2021 | |
| 32. | Iraq | 3,521,064 | 2021 | |
| 18. | Iran | 5,968,120 | 2021 | |
| 3. | Indonesia | 22,281,752 | 2021 | |
| 1. | India | 115,727,616 | 2021 | |
| 181. | Iceland | 21,942 | 2021 | |
| 105. | Hungary | 508,479 | 2021 | |
| 121. | Hong Kong | 309,881 | 2021 | |
| 82. | Honduras | 962,239 | 2021 | |
| 77. | Haiti | 1,119,167 | 2021 | |
| 159. | Guyana | 82,405 | 2021 | |
| 146. | Guinea-Bissau | 183,504 | 2021 | |
| 73. | Guinea | 1,269,531 | 2021 | |
| 207. | Guernsey | 3,789 | 2021 | |
| 61. | Guatemala | 1,666,405 | 2021 | |
| 186. | Guam | 17,106 | 2021 | |
| 193. | Grenada | 7,529 | 2021 | |
| 205. | Greenland | 4,170 | 2021 | |
| 104. | Greece | 525,459 | 2021 | |
| 216. | Gibraltar | 1,948 | 2021 | |
| 43. | Ghana | 2,707,409 | 2021 | |
| 26. | Germany | 4,160,707 | 2021 | |
| 138. | Georgia | 238,760 | 2021 | |
| 141. | Gaza Strip | 201,254 | 2021 | |
| 144. | Gabon | 184,440 | 2021 | |
| 182. | French Polynesia | 21,648 | 2021 | |
| 28. | France | 4,040,128 | 2021 | |
| 128. | Finland | 294,742 | 2021 | |
| 162. | Fiji | 70,058 | 2021 | |
| 191. | Federated States of Micronesia | 8,932 | 2021 | |
| 210. | Faroe Islands | 3,572 | 2021 | |
| 9. | Ethiopia | 11,100,503 | 2021 | |
| 167. | Estonia | 55,334 | 2021 | |
| 87. | Eritrea | 737,539 | 2021 | |
| 161. | Equatorial Guinea | 79,643 | 2021 | |
| 98. | El Salvador | 589,164 | 2021 | |
| 13. | Egypt | 8,120,208 | 2021 | |
| 66. | Ecuador | 1,512,550 | 2021 | |
| 153. | East Timor | 126,162 | 2021 | |
| 81. | Dominican Republic | 976,581 | 2021 | |
| 202. | Dominica | 4,764 | 2021 | |
| 155. | Djibouti | 97,303 | 2021 | |
| 117. | Denmark | 367,443 | 2021 | |
| 12. | Democratic Republic of the Congo | 9,153,337 | 2021 | |
| 109. | Czech Republic | 459,634 | 2021 | |
| 158. | Cyprus | 85,459 | 2021 | |
| 89. | Cuba | 698,461 | 2021 | |
| 136. | Croatia | 250,018 | 2021 | |
| 46. | Cote d'Ivoire | 2,595,866 | 2021 | |
| 114. | Costa Rica | 398,602 | 2021 | |
| 225. | Cook Islands | 601 | 2021 | |
| 160. | Comoros | 80,814 | 2021 | |
| 27. | Colombia | 4,058,231 | 2021 | |
| 2. | China | 82,135,672 | 2021 | |
| 70. | Chile | 1,313,931 | 2021 | |
| 197. | Channel Islands | 7,209 | 2021 | |
| 71. | Chad | 1,311,197 | 2021 | |
| 100. | Central African Republic | 570,136 | 2021 | |
| 208. | Cayman Islands | 3,779 | 2021 | |
| 169. | Cape Verde | 53,950 | 2021 | |
| 53. | Canada | 2,085,494 | 2021 | |
| 50. | Cameroon | 2,290,079 | 2021 | |
| 68. | Cambodia | 1,410,579 | 2021 | |
| 72. | Burundi | 1,284,491 | 2021 | |
| 54. | Burkina Faso | 2,084,058 | 2021 | |
| 127. | Bulgaria | 299,461 | 2021 | |
| 170. | Brunei | 40,031 | 2021 |
