The World: Population - Age 20-24 (2021) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 228. | Saint Pierre and Miquelon | 212 | 2021 | |
| 227. | Saint Barthélemy | 320 | 2021 | |
| 226. | Saint Helena | 483 | 2021 | |
| 225. | Cook Islands | 601 | 2021 | |
| 224. | Nauru | 794 | 2021 | |
| 223. | Montserrat | 813 | 2021 | |
| 222. | Tuvalu | 1,017 | 2021 | |
| 221. | Wallis and Futuna | 1,118 | 2021 | |
| 220. | Anguilla | 1,273 | 2021 | |
| 219. | Monaco | 1,471 | 2021 | |
| 218. | Palau | 1,597 | 2021 | |
| 217. | Saint Martin | 1,715 | 2021 | |
| 216. | Gibraltar | 1,948 | 2021 | |
| 215. | San Marino | 2,066 | 2021 | |
| 214. | Liechtenstein | 2,334 | 2021 | |
| 213. | British Virgin Islands | 2,583 | 2021 | |
| 212. | Northern Mariana Islands | 2,736 | 2021 | |
| 211. | Sint Maarten | 3,113 | 2021 | |
| 210. | Faroe Islands | 3,572 | 2021 | |
| 209. | Saint Kitts and Nevis | 3,753 | 2021 | |
| 208. | Cayman Islands | 3,779 | 2021 | |
| 207. | Guernsey | 3,789 | 2021 | |
| 206. | Turks and Caicos Islands | 3,832 | 2021 | |
| 205. | Greenland | 4,170 | 2021 | |
| 204. | Andorra | 4,289 | 2021 | |
| 203. | Bermuda | 4,293 | 2021 | |
| 202. | Dominica | 4,764 | 2021 | |
| 201. | Isle of Man | 5,070 | 2021 | |
| 200. | U.S. Virgin Islands | 5,549 | 2021 | |
| 199. | Seychelles | 5,886 | 2021 | |
| 198. | American Samoa | 6,494 | 2021 | |
| 197. | Channel Islands | 7,209 | 2021 | |
| 196. | Marshall Islands | 7,242 | 2021 | |
| 195. | Saint Vincent and the Grenadines | 7,410 | 2021 | |
| 194. | Aruba | 7,439 | 2021 | |
| 193. | Grenada | 7,529 | 2021 | |
| 192. | Antigua and Barbuda | 8,265 | 2021 | |
| 191. | Federated States of Micronesia | 8,932 | 2021 | |
| 190. | Tonga | 9,832 | 2021 | |
| 189. | Netherlands Antilles | 9,925 | 2021 | |
| 188. | Saint Lucia | 11,335 | 2021 | |
| 187. | Kiribati | 11,711 | 2021 | |
| 186. | Guam | 17,106 | 2021 | |
| 185. | Barbados | 18,190 | 2021 | |
| 184. | Samoa | 19,074 | 2021 | |
| 183. | Sao Tome and Principe | 21,187 | 2021 | |
| 182. | French Polynesia | 21,648 | 2021 | |
| 181. | Iceland | 21,942 | 2021 | |
| 180. | Vanuatu | 21,953 | 2021 | |
| 179. | Malta | 23,268 | 2021 | |
| 178. | Mayotte | 23,335 | 2021 | |
| 177. | New Caledonia | 23,527 | 2021 | |
| 176. | The Bahamas | 26,623 | 2021 | |
| 175. | Montenegro | 29,054 | 2021 | |
| 174. | Macau | 31,389 | 2021 | |
| 173. | Luxembourg | 35,874 | 2021 | |
| 172. | Maldives | 35,942 | 2021 | |
| 171. | Belize | 37,510 | 2021 | |
| 170. | Brunei | 40,031 | 2021 | |
| 169. | Cape Verde | 53,950 | 2021 | |
| 168. | Suriname | 54,291 | 2021 | |
| 167. | Estonia | 55,334 | 2021 | |
| 166. | Western Sahara | 61,523 | 2021 | |
| 165. | Trinidad and Tobago | 66,178 | 2021 | |
| 164. | Solomon Islands | 66,374 | 2021 | |
| 163. | Bhutan | 70,001 | 2021 | |
| 162. | Fiji | 70,058 | 2021 | |
| 161. | Equatorial Guinea | 79,643 | 2021 | |
| 160. | Comoros | 80,814 | 2021 | |
| 159. | Guyana | 82,405 | 2021 | |
| 158. | Cyprus | 85,459 | 2021 | |
| 157. | Latvia | 87,388 | 2021 | |
| 156. | Slovenia | 90,442 | 2021 | |
| 155. | Djibouti | 97,303 | 2021 | |
| 154. | Mauritius | 97,305 | 2021 | |
| 153. | East Timor | 126,162 | 2021 | |
| 152. | Bahrain | 127,438 | 2021 | |
| 151. | Macedonia | 138,570 | 2021 | |
| 150. | Swaziland | 163,219 | 2021 | |
| 149. | Kosovo | 165,362 | 2021 | |
| 148. | Lithuania | 172,715 | 2021 | |
| 147. | Armenia | 176,947 | 2021 | |
| 146. | Guinea-Bissau | 183,504 | 2021 | |
| 145. | Lesotho | 183,965 | 2021 | |
| 144. | Gabon | 184,440 | 2021 | |
| 143. | Moldova | 185,238 | 2021 | |
| 142. | Qatar | 189,780 | 2021 | |
| 141. | Gaza Strip | 201,254 | 2021 | |
| 140. | The Gambia | 211,798 | 2021 | |
| 139. | Botswana | 238,280 | 2021 | |
| 138. | Georgia | 238,760 | 2021 | |
| 137. | Albania | 248,321 | 2021 | |
| 136. | Croatia | 250,018 | 2021 | |
| 135. | Bosnia and Herzegovina | 250,611 | 2021 | |
| 134. | Puerto Rico | 255,576 | 2021 | |
| 133. | Namibia | 256,001 | 2021 | |
| 132. | Kuwait | 260,495 | 2021 | |
| 131. | Uruguay | 262,195 | 2021 | |
| 130. | Mongolia | 276,529 | 2021 | |
| 129. | Slovakia | 284,766 | 2021 |
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