The World: Population - Age 20-24 (2018) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 93. | Jordan | 643,002 | 2018 | |
| 70. | Kazakhstan | 1,358,477 | 2018 | |
| 25. | Kenya | 4,201,870 | 2018 | |
| 189. | Kiribati | 11,190 | 2018 | |
| 150. | Kosovo | 156,545 | 2018 | |
| 137. | Kuwait | 259,073 | 2018 | |
| 105. | Kyrgyzstan | 522,951 | 2018 | |
| 87. | Laos | 718,548 | 2018 | |
| 155. | Latvia | 96,674 | 2018 | |
| 120. | Lebanon | 329,161 | 2018 | |
| 146. | Lesotho | 183,337 | 2018 | |
| 115. | Liberia | 394,227 | 2018 | |
| 97. | Libya | 599,435 | 2018 | |
| 214. | Liechtenstein | 2,269 | 2018 | |
| 143. | Lithuania | 194,058 | 2018 | |
| 174. | Luxembourg | 35,403 | 2018 | |
| 172. | Macau | 38,773 | 2018 | |
| 151. | Macedonia | 146,663 | 2018 | |
| 46. | Madagascar | 2,464,305 | 2018 | |
| 58. | Malawi | 1,830,407 | 2018 | |
| 45. | Malaysia | 2,570,504 | 2018 | |
| 170. | Maldives | 43,565 | 2018 | |
| 64. | Mali | 1,522,950 | 2018 | |
| 177. | Malta | 24,915 | 2018 | |
| 199. | Marshall Islands | 6,336 | 2018 | |
| 118. | Mauritania | 357,074 | 2018 | |
| 154. | Mauritius | 100,388 | 2018 | |
| 182. | Mayotte | 20,169 | 2018 | |
| 10. | Mexico | 10,306,384 | 2018 | |
| 140. | Moldova | 220,264 | 2018 | |
| 219. | Monaco | 1,457 | 2018 | |
| 130. | Mongolia | 288,229 | 2018 | |
| 175. | Montenegro | 30,399 | 2018 | |
| 226. | Montserrat | 344 | 2018 | |
| 38. | Morocco | 2,880,359 | 2018 | |
| 43. | Mozambique | 2,726,686 | 2018 | |
| 22. | Myanmar | 5,038,158 | 2018 | |
| 138. | Namibia | 255,897 | 2018 | |
| 223. | Nauru | 756 | 2018 | |
| 31. | Nepal | 3,644,525 | 2018 | |
| 79. | Netherlands | 1,036,140 | 2018 | |
| 188. | Netherlands Antilles | 11,307 | 2018 | |
| 178. | New Caledonia | 23,143 | 2018 | |
| 128. | New Zealand | 302,204 | 2018 | |
| 92. | Nicaragua | 646,469 | 2018 | |
| 57. | Niger | 1,839,813 | 2018 | |
| 6. | Nigeria | 17,726,668 | 2018 | |
| 55. | North Korea | 2,004,938 | 2018 | |
| 212. | Northern Mariana Islands | 2,916 | 2018 | |
| 122. | Norway | 318,508 | 2018 | |
| 119. | Oman | 336,976 | 2018 | |
| 5. | Pakistan | 21,406,384 | 2018 | |
| 217. | Palau | 1,818 | 2018 | |
| 123. | Panama | 318,240 | 2018 | |
| 91. | Papua New Guinea | 667,397 | 2018 | |
| 89. | Paraguay | 699,049 | 2018 | |
| 37. | Peru | 2,902,969 | 2018 | |
| 9. | Philippines | 10,392,007 | 2018 | |
| 53. | Poland | 2,119,105 | 2018 | |
| 96. | Portugal | 610,883 | 2018 | |
| 135. | Puerto Rico | 269,348 | 2018 | |
| 144. | Qatar | 192,816 | 2018 | |
| 108. | Republic of Congo | 495,530 | 2018 | |
| 75. | Romania | 1,147,811 | 2018 | |
| 17. | Russia | 6,575,167 | 2018 | |
| 73. | Rwanda | 1,163,275 | 2018 | |
| 227. | Saint Barthélemy | 311 | 2018 | |
| 225. | Saint Helena | 480 | 2018 | |
| 209. | Saint Kitts and Nevis | 3,731 | 2018 | |
| 187. | Saint Lucia | 12,935 | 2018 | |
| 218. | Saint Martin | 1,713 | 2018 | |
| 228. | Saint Pierre and Miquelon | 213 | 2018 | |
| 194. | Saint Vincent and the Grenadines | 7,912 | 2018 | |
| 183. | Samoa | 19,094 | 2018 | |
| 216. | San Marino | 1,928 | 2018 | |
| 184. | Sao Tome and Principe | 18,960 | 2018 | |
| 41. | Saudi Arabia | 2,794,979 | 2018 | |
| 68. | Senegal | 1,418,981 | 2018 | |
| 113. | Serbia | 413,302 | 2018 | |
| 198. | Seychelles | 6,362 | 2018 | |
| 101. | Sierra Leone | 541,147 | 2018 | |
| 99. | Singapore | 576,661 | 2018 | |
| 211. | Sint Maarten | 3,243 | 2018 | |
| 125. | Slovakia | 310,482 | 2018 | |
| 157. | Slovenia | 95,081 | 2018 | |
| 165. | Solomon Islands | 62,772 | 2018 | |
| 81. | Somalia | 959,546 | 2018 | |
| 23. | South Africa | 4,680,902 | 2018 | |
| 32. | South Korea | 3,365,570 | 2018 | |
| 48. | Spain | 2,356,115 | 2018 | |
| 60. | Sri Lanka | 1,608,886 | 2018 | |
| 19. | Sudan | 5,128,805 | 2018 | |
| 169. | Suriname | 50,225 | 2018 | |
| 149. | Swaziland | 158,920 | 2018 | |
| 102. | Sweden | 540,427 | 2018 | |
| 112. | Switzerland | 455,372 | 2018 | |
| 50. | Syria | 2,278,806 | 2018 | |
| 61. | Taiwan | 1,573,081 | 2018 | |
| 85. | Tajikistan | 769,826 | 2018 | |
| 21. | Tanzania | 5,062,319 | 2018 |
