The World: Population - Age 30-34 (2018) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 61. | Zimbabwe | 1,432,255 | 2018 | |
| 69. | Zambia | 1,106,272 | 2018 | |
| 48. | Yemen | 2,161,641 | 2018 | |
| 171. | Western Sahara | 44,755 | 2018 | |
| 141. | West Bank | 223,879 | 2018 | |
| 219. | Wallis and Futuna | 1,305 | 2018 | |
| 12. | Vietnam | 8,840,187 | 2018 | |
| 45. | Venezuela | 2,274,019 | 2018 | |
| 179. | Vanuatu | 21,612 | 2018 | |
| 38. | Uzbekistan | 2,905,176 | 2018 | |
| 140. | Uruguay | 229,006 | 2018 | |
| 3. | United States of America | 22,073,272 | 2018 | |
| 22. | United Kingdom | 4,444,180 | 2018 | |
| 74. | United Arab Emirates | 932,965 | 2018 | |
| 27. | Ukraine | 3,680,441 | 2018 | |
| 41. | Uganda | 2,609,703 | 2018 | |
| 199. | U.S. Virgin Islands | 6,416 | 2018 | |
| 223. | Tuvalu | 908 | 2018 | |
| 201. | Turks and Caicos Islands | 5,037 | 2018 | |
| 104. | Turkmenistan | 500,865 | 2018 | |
| 17. | Turkey | 6,818,722 | 2018 | |
| 76. | Tunisia | 907,801 | 2018 | |
| 156. | Trinidad and Tobago | 112,937 | 2018 | |
| 196. | Tonga | 7,078 | 2018 | |
| 97. | Togo | 592,728 | 2018 | |
| 148. | The Gambia | 160,556 | 2018 | |
| 177. | The Bahamas | 23,931 | 2018 | |
| 21. | Thailand | 4,902,478 | 2018 | |
| 30. | Tanzania | 3,606,381 | 2018 | |
| 85. | Tajikistan | 781,948 | 2018 | |
| 53. | Taiwan | 1,677,338 | 2018 | |
| 49. | Syria | 2,046,381 | 2018 | |
| 105. | Switzerland | 498,872 | 2018 | |
| 96. | Sweden | 600,190 | 2018 | |
| 153. | Swaziland | 126,259 | 2018 | |
| 166. | Suriname | 52,882 | 2018 | |
| 28. | Sudan | 3,674,447 | 2018 | |
| 57. | Sri Lanka | 1,648,101 | 2018 | |
| 34. | Spain | 3,146,060 | 2018 | |
| 33. | South Korea | 3,205,275 | 2018 | |
| 23. | South Africa | 4,350,732 | 2018 | |
| 88. | Somalia | 703,724 | 2018 | |
| 169. | Solomon Islands | 48,553 | 2018 | |
| 151. | Slovenia | 131,198 | 2018 | |
| 115. | Slovakia | 424,921 | 2018 | |
| 216. | Sint Maarten | 1,984 | 2018 | |
| 93. | Singapore | 622,520 | 2018 | |
| 114. | Sierra Leone | 426,412 | 2018 | |
| 193. | Seychelles | 8,128 | 2018 | |
| 108. | Serbia | 489,256 | 2018 | |
| 72. | Senegal | 1,025,012 | 2018 | |
| 35. | Saudi Arabia | 3,119,066 | 2018 | |
| 184. | Sao Tome and Principe | 13,490 | 2018 | |
| 217. | San Marino | 1,792 | 2018 | |
| 183. | Samoa | 13,810 | 2018 | |
| 195. | Saint Vincent and the Grenadines | 7,426 | 2018 | |
| 228. | Saint Pierre and Miquelon | 279 | 2018 | |
| 211. | Saint Martin | 3,384 | 2018 | |
| 187. | Saint Lucia | 12,489 | 2018 | |
| 208. | Saint Kitts and Nevis | 3,973 | 2018 | |
| 224. | Saint Helena | 494 | 2018 | |
| 225. | Saint Barthélemy | 480 | 2018 | |
| 73. | Rwanda | 1,023,415 | 2018 | |
| 9. | Russia | 11,908,242 | 2018 | |
| 56. | Romania | 1,664,875 | 2018 | |
| 125. | Republic of Congo | 324,618 | 2018 | |
| 117. | Qatar | 400,775 | 2018 | |
| 138. | Puerto Rico | 255,225 | 2018 | |
| 89. | Portugal | 680,923 | 2018 | |
| 36. | Poland | 3,055,667 | 2018 | |
| 13. | Philippines | 8,808,139 | 2018 | |
| 44. | Peru | 2,361,789 | 2018 | |
| 98. | Paraguay | 576,344 | 2018 | |
| 106. | Papua New Guinea | 496,827 | 2018 | |
| 134. | Panama | 280,407 | 2018 | |
| 218. | Palau | 1,678 | 2018 | |
| 6. | Pakistan | 16,904,220 | 2018 | |
| 119. | Oman | 360,328 | 2018 | |
| 133. | Norway | 287,438 | 2018 | |
| 210. | Northern Mariana Islands | 3,423 | 2018 | |
| 51. | North Korea | 1,807,777 | 2018 | |
| 8. | Nigeria | 12,811,239 | 2018 | |
| 68. | Niger | 1,185,117 | 2018 | |
| 107. | Nicaragua | 496,368 | 2018 | |
| 132. | New Zealand | 292,759 | 2018 | |
| 181. | New Caledonia | 21,306 | 2018 | |
| 188. | Netherlands Antilles | 10,676 | 2018 | |
| 70. | Netherlands | 1,060,104 | 2018 | |
| 40. | Nepal | 2,671,605 | 2018 | |
| 222. | Nauru | 986 | 2018 | |
| 142. | Namibia | 204,976 | 2018 | |
| 20. | Myanmar | 4,936,967 | 2018 | |
| 60. | Mozambique | 1,518,981 | 2018 | |
| 37. | Morocco | 2,917,778 | 2018 | |
| 226. | Montserrat | 453 | 2018 | |
| 167. | Montenegro | 52,247 | 2018 | |
| 126. | Mongolia | 323,208 | 2018 | |
| 221. | Monaco | 1,205 | 2018 | |
| 129. | Moldova | 305,187 | 2018 | |
| 10. | Mexico | 9,321,861 | 2018 |
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