The World: Population - Age 30-34 (2021) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 65. | Zimbabwe | 1,388,610 | 2021 | |
| 69. | Zambia | 1,172,011 | 2021 | |
| 48. | Yemen | 2,333,090 | 2021 | |
| 169. | Western Sahara | 48,886 | 2021 | |
| 139. | West Bank | 258,725 | 2021 | |
| 220. | Wallis and Futuna | 1,289 | 2021 | |
| 13. | Vietnam | 8,846,421 | 2021 | |
| 46. | Venezuela | 2,412,723 | 2021 | |
| 181. | Vanuatu | 22,425 | 2021 | |
| 35. | Uzbekistan | 3,023,305 | 2021 | |
| 141. | Uruguay | 245,844 | 2021 | |
| 3. | United States of America | 23,022,782 | 2021 | |
| 22. | United Kingdom | 4,576,482 | 2021 | |
| 74. | United Arab Emirates | 981,900 | 2021 | |
| 31. | Ukraine | 3,329,674 | 2021 | |
| 38. | Uganda | 2,973,363 | 2021 | |
| 198. | U.S. Virgin Islands | 6,348 | 2021 | |
| 222. | Tuvalu | 1,026 | 2021 | |
| 203. | Turks and Caicos Islands | 4,648 | 2021 | |
| 105. | Turkmenistan | 520,632 | 2021 | |
| 16. | Turkey | 6,771,918 | 2021 | |
| 82. | Tunisia | 845,490 | 2021 | |
| 158. | Trinidad and Tobago | 91,106 | 2021 | |
| 197. | Tonga | 6,847 | 2021 | |
| 94. | Togo | 645,139 | 2021 | |
| 146. | The Gambia | 174,235 | 2021 | |
| 177. | The Bahamas | 25,423 | 2021 | |
| 21. | Thailand | 4,802,863 | 2021 | |
| 27. | Tanzania | 3,935,980 | 2021 | |
| 83. | Tajikistan | 826,306 | 2021 | |
| 59. | Taiwan | 1,579,498 | 2021 | |
| 49. | Syria | 2,164,145 | 2021 | |
| 108. | Switzerland | 507,792 | 2021 | |
| 90. | Sweden | 658,972 | 2021 | |
| 152. | Swaziland | 134,903 | 2021 | |
| 170. | Suriname | 48,499 | 2021 | |
| 25. | Sudan | 4,054,200 | 2021 | |
| 60. | Sri Lanka | 1,576,412 | 2021 | |
| 37. | Spain | 3,001,403 | 2021 | |
| 34. | South Korea | 3,101,913 | 2021 | |
| 23. | South Africa | 4,487,584 | 2021 | |
| 85. | Somalia | 813,478 | 2021 | |
| 167. | Solomon Islands | 52,324 | 2021 | |
| 155. | Slovenia | 121,143 | 2021 | |
| 117. | Slovakia | 396,954 | 2021 | |
| 214. | Sint Maarten | 2,868 | 2021 | |
| 89. | Singapore | 666,053 | 2021 | |
| 110. | Sierra Leone | 463,716 | 2021 | |
| 194. | Seychelles | 7,821 | 2021 | |
| 111. | Serbia | 459,865 | 2021 | |
| 71. | Senegal | 1,120,128 | 2021 | |
| 33. | Saudi Arabia | 3,232,558 | 2021 | |
| 185. | Sao Tome and Principe | 13,864 | 2021 | |
| 218. | San Marino | 1,812 | 2021 | |
| 183. | Samoa | 15,652 | 2021 | |
| 195. | Saint Vincent and the Grenadines | 7,186 | 2021 | |
| 228. | Saint Pierre and Miquelon | 185 | 2021 | |
| 213. | Saint Martin | 3,224 | 2021 | |
| 187. | Saint Lucia | 11,302 | 2021 | |
| 208. | Saint Kitts and Nevis | 3,969 | 2021 | |
| 226. | Saint Helena | 430 | 2021 | |
| 224. | Saint Barthélemy | 480 | 2021 | |
| 73. | Rwanda | 1,066,342 | 2021 | |
| 9. | Russia | 10,960,419 | 2021 | |
| 58. | Romania | 1,609,252 | 2021 | |
| 119. | Republic of Congo | 364,490 | 2021 | |
| 116. | Qatar | 401,697 | 2021 | |
| 140. | Puerto Rico | 258,032 | 2021 | |
| 93. | Portugal | 650,747 | 2021 | |
| 41. | Poland | 2,681,961 | 2021 | |
| 12. | Philippines | 9,139,266 | 2021 | |
| 43. | Peru | 2,555,916 | 2021 | |
| 95. | Paraguay | 630,357 | 2021 | |
| 103. | Papua New Guinea | 536,816 | 2021 | |
| 133. | Panama | 290,250 | 2021 | |
| 217. | Palau | 1,825 | 2021 | |
| 5. | Pakistan | 18,556,972 | 2021 | |
| 118. | Oman | 373,920 | 2021 | |
| 129. | Norway | 314,713 | 2021 | |
| 211. | Northern Mariana Islands | 3,516 | 2021 | |
| 52. | North Korea | 1,925,603 | 2021 | |
| 8. | Nigeria | 13,784,769 | 2021 | |
| 68. | Niger | 1,312,148 | 2021 | |
| 102. | Nicaragua | 538,954 | 2021 | |
| 130. | New Zealand | 313,371 | 2021 | |
| 180. | New Caledonia | 22,807 | 2021 | |
| 188. | Netherlands Antilles | 10,732 | 2021 | |
| 72. | Netherlands | 1,110,195 | 2021 | |
| 36. | Nepal | 3,011,802 | 2021 | |
| 223. | Nauru | 942 | 2021 | |
| 142. | Namibia | 212,725 | 2021 | |
| 20. | Myanmar | 4,989,984 | 2021 | |
| 53. | Mozambique | 1,818,676 | 2021 | |
| 40. | Morocco | 2,833,042 | 2021 | |
| 227. | Montserrat | 361 | 2021 | |
| 171. | Montenegro | 46,154 | 2021 | |
| 124. | Mongolia | 340,166 | 2021 | |
| 219. | Monaco | 1,359 | 2021 | |
| 135. | Moldova | 279,283 | 2021 | |
| 10. | Mexico | 9,626,193 | 2021 |
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