The World: Population - Age 30-34 (2020) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 62. | Zimbabwe | 1,402,820 | 2020 | |
| 69. | Zambia | 1,148,603 | 2020 | |
| 48. | Yemen | 2,277,536 | 2020 | |
| 171. | Western Sahara | 47,526 | 2020 | |
| 140. | West Bank | 247,045 | 2020 | |
| 220. | Wallis and Futuna | 1,295 | 2020 | |
| 13. | Vietnam | 8,800,086 | 2020 | |
| 47. | Venezuela | 2,330,048 | 2020 | |
| 180. | Vanuatu | 22,222 | 2020 | |
| 36. | Uzbekistan | 2,994,874 | 2020 | |
| 141. | Uruguay | 242,415 | 2020 | |
| 3. | United States of America | 22,706,516 | 2020 | |
| 22. | United Kingdom | 4,549,283 | 2020 | |
| 74. | United Arab Emirates | 967,321 | 2020 | |
| 31. | Ukraine | 3,481,221 | 2020 | |
| 40. | Uganda | 2,853,366 | 2020 | |
| 199. | U.S. Virgin Islands | 6,299 | 2020 | |
| 222. | Tuvalu | 992 | 2020 | |
| 203. | Turks and Caicos Islands | 4,684 | 2020 | |
| 105. | Turkmenistan | 519,175 | 2020 | |
| 16. | Turkey | 6,772,442 | 2020 | |
| 79. | Tunisia | 867,198 | 2020 | |
| 157. | Trinidad and Tobago | 99,879 | 2020 | |
| 196. | Tonga | 6,932 | 2020 | |
| 94. | Togo | 629,590 | 2020 | |
| 147. | The Gambia | 169,544 | 2020 | |
| 178. | The Bahamas | 24,550 | 2020 | |
| 21. | Thailand | 4,777,497 | 2020 | |
| 27. | Tanzania | 3,829,086 | 2020 | |
| 84. | Tajikistan | 809,635 | 2020 | |
| 60. | Taiwan | 1,585,561 | 2020 | |
| 49. | Syria | 2,135,761 | 2020 | |
| 107. | Switzerland | 503,852 | 2020 | |
| 93. | Sweden | 642,603 | 2020 | |
| 152. | Swaziland | 132,375 | 2020 | |
| 169. | Suriname | 49,787 | 2020 | |
| 25. | Sudan | 3,922,245 | 2020 | |
| 59. | Sri Lanka | 1,590,394 | 2020 | |
| 35. | Spain | 3,037,298 | 2020 | |
| 34. | South Korea | 3,087,510 | 2020 | |
| 23. | South Africa | 4,476,773 | 2020 | |
| 86. | Somalia | 778,818 | 2020 | |
| 167. | Solomon Islands | 51,011 | 2020 | |
| 154. | Slovenia | 124,943 | 2020 | |
| 116. | Slovakia | 405,874 | 2020 | |
| 214. | Sint Maarten | 2,548 | 2020 | |
| 91. | Singapore | 652,438 | 2020 | |
| 112. | Sierra Leone | 453,117 | 2020 | |
| 194. | Seychelles | 7,899 | 2020 | |
| 110. | Serbia | 467,775 | 2020 | |
| 72. | Senegal | 1,089,082 | 2020 | |
| 33. | Saudi Arabia | 3,202,112 | 2020 | |
| 185. | Sao Tome and Principe | 13,792 | 2020 | |
| 217. | San Marino | 1,785 | 2020 | |
| 183. | Samoa | 15,081 | 2020 | |
| 195. | Saint Vincent and the Grenadines | 7,290 | 2020 | |
| 228. | Saint Pierre and Miquelon | 218 | 2020 | |
| 212. | Saint Martin | 3,286 | 2020 | |
| 187. | Saint Lucia | 11,584 | 2020 | |
| 208. | Saint Kitts and Nevis | 3,945 | 2020 | |
| 225. | Saint Helena | 447 | 2020 | |
| 224. | Saint Barthélemy | 477 | 2020 | |
| 73. | Rwanda | 1,054,704 | 2020 | |
| 9. | Russia | 11,446,098 | 2020 | |
| 56. | Romania | 1,685,171 | 2020 | |
| 120. | Republic of Congo | 350,907 | 2020 | |
| 117. | Qatar | 402,977 | 2020 | |
| 139. | Puerto Rico | 257,200 | 2020 | |
| 90. | Portugal | 656,217 | 2020 | |
| 41. | Poland | 2,782,786 | 2020 | |
| 12. | Philippines | 9,028,623 | 2020 | |
| 42. | Peru | 2,490,911 | 2020 | |
| 97. | Paraguay | 613,524 | 2020 | |
| 103. | Papua New Guinea | 522,889 | 2020 | |
| 133. | Panama | 287,180 | 2020 | |
| 218. | Palau | 1,767 | 2020 | |
| 5. | Pakistan | 18,063,044 | 2020 | |
| 118. | Oman | 368,810 | 2020 | |
| 130. | Norway | 305,484 | 2020 | |
| 211. | Northern Mariana Islands | 3,345 | 2020 | |
| 51. | North Korea | 1,886,883 | 2020 | |
| 8. | Nigeria | 13,441,009 | 2020 | |
| 68. | Niger | 1,266,994 | 2020 | |
| 104. | Nicaragua | 519,370 | 2020 | |
| 129. | New Zealand | 306,014 | 2020 | |
| 181. | New Caledonia | 22,082 | 2020 | |
| 188. | Netherlands Antilles | 10,853 | 2020 | |
| 71. | Netherlands | 1,094,210 | 2020 | |
| 38. | Nepal | 2,900,241 | 2020 | |
| 223. | Nauru | 977 | 2020 | |
| 142. | Namibia | 210,352 | 2020 | |
| 20. | Myanmar | 4,977,886 | 2020 | |
| 54. | Mozambique | 1,704,591 | 2020 | |
| 39. | Morocco | 2,877,649 | 2020 | |
| 227. | Montserrat | 378 | 2020 | |
| 170. | Montenegro | 48,653 | 2020 | |
| 124. | Mongolia | 338,551 | 2020 | |
| 219. | Monaco | 1,328 | 2020 | |
| 132. | Moldova | 292,662 | 2020 | |
| 10. | Mexico | 9,533,667 | 2020 |
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