The World: Population - Age 25-29 (2018) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 101. | Jordan | 583,790 | 2018 | |
| 58. | Kazakhstan | 1,631,758 | 2018 | |
| 28. | Kenya | 3,975,899 | 2018 | |
| 189. | Kiribati | 10,215 | 2018 | |
| 147. | Kosovo | 170,440 | 2018 | |
| 122. | Kuwait | 335,932 | 2018 | |
| 103. | Kyrgyzstan | 575,658 | 2018 | |
| 90. | Laos | 671,026 | 2018 | |
| 148. | Latvia | 155,880 | 2018 | |
| 120. | Lebanon | 355,880 | 2018 | |
| 145. | Lesotho | 185,764 | 2018 | |
| 132. | Liberia | 302,862 | 2018 | |
| 99. | Libya | 602,412 | 2018 | |
| 216. | Liechtenstein | 2,364 | 2018 | |
| 140. | Lithuania | 257,149 | 2018 | |
| 174. | Luxembourg | 37,302 | 2018 | |
| 171. | Macau | 48,595 | 2018 | |
| 150. | Macedonia | 150,660 | 2018 | |
| 52. | Madagascar | 2,120,818 | 2018 | |
| 62. | Malawi | 1,553,682 | 2018 | |
| 47. | Malaysia | 2,433,853 | 2018 | |
| 169. | Maldives | 49,782 | 2018 | |
| 70. | Mali | 1,243,991 | 2018 | |
| 176. | Malta | 28,248 | 2018 | |
| 201. | Marshall Islands | 5,562 | 2018 | |
| 128. | Mauritania | 311,922 | 2018 | |
| 157. | Mauritius | 106,478 | 2018 | |
| 186. | Mayotte | 13,385 | 2018 | |
| 9. | Mexico | 9,967,335 | 2018 | |
| 138. | Moldova | 268,802 | 2018 | |
| 219. | Monaco | 1,441 | 2018 | |
| 125. | Mongolia | 322,703 | 2018 | |
| 173. | Montenegro | 41,213 | 2018 | |
| 227. | Montserrat | 353 | 2018 | |
| 40. | Morocco | 2,816,149 | 2018 | |
| 51. | Mozambique | 2,184,193 | 2018 | |
| 19. | Myanmar | 5,073,132 | 2018 | |
| 142. | Namibia | 235,050 | 2018 | |
| 223. | Nauru | 837 | 2018 | |
| 34. | Nepal | 3,231,241 | 2018 | |
| 72. | Netherlands | 1,101,066 | 2018 | |
| 188. | Netherlands Antilles | 10,905 | 2018 | |
| 180. | New Caledonia | 23,137 | 2018 | |
| 129. | New Zealand | 310,513 | 2018 | |
| 98. | Nicaragua | 610,245 | 2018 | |
| 66. | Niger | 1,442,689 | 2018 | |
| 7. | Nigeria | 15,068,488 | 2018 | |
| 53. | North Korea | 2,024,896 | 2018 | |
| 211. | Northern Mariana Islands | 3,413 | 2018 | |
| 126. | Norway | 322,330 | 2018 | |
| 118. | Oman | 366,556 | 2018 | |
| 5. | Pakistan | 19,658,780 | 2018 | |
| 217. | Palau | 1,840 | 2018 | |
| 134. | Panama | 297,593 | 2018 | |
| 102. | Papua New Guinea | 576,909 | 2018 | |
| 92. | Paraguay | 659,707 | 2018 | |
| 41. | Peru | 2,750,055 | 2018 | |
| 10. | Philippines | 9,523,590 | 2018 | |
| 44. | Poland | 2,568,346 | 2018 | |
| 95. | Portugal | 641,181 | 2018 | |
| 139. | Puerto Rico | 263,391 | 2018 | |
| 124. | Qatar | 326,050 | 2018 | |
| 115. | Republic of Congo | 409,712 | 2018 | |
| 67. | Romania | 1,413,484 | 2018 | |
| 11. | Russia | 9,378,806 | 2018 | |
| 73. | Rwanda | 1,094,213 | 2018 | |
| 225. | Saint Barthélemy | 509 | 2018 | |
| 226. | Saint Helena | 427 | 2018 | |
| 210. | Saint Kitts and Nevis | 3,919 | 2018 | |
| 187. | Saint Lucia | 11,828 | 2018 | |
| 214. | Saint Martin | 2,546 | 2018 | |
| 228. | Saint Pierre and Miquelon | 173 | 2018 | |
| 195. | Saint Vincent and the Grenadines | 7,592 | 2018 | |
| 183. | Samoa | 17,274 | 2018 | |
| 218. | San Marino | 1,747 | 2018 | |
| 185. | Sao Tome and Principe | 14,788 | 2018 | |
| 36. | Saudi Arabia | 3,048,325 | 2018 | |
| 71. | Senegal | 1,223,020 | 2018 | |
| 112. | Serbia | 443,310 | 2018 | |
| 196. | Seychelles | 7,121 | 2018 | |
| 110. | Sierra Leone | 491,215 | 2018 | |
| 94. | Singapore | 656,142 | 2018 | |
| 212. | Sint Maarten | 3,154 | 2018 | |
| 117. | Slovakia | 382,940 | 2018 | |
| 155. | Slovenia | 110,839 | 2018 | |
| 166. | Solomon Islands | 55,456 | 2018 | |
| 83. | Somalia | 868,038 | 2018 | |
| 21. | South Africa | 4,879,303 | 2018 | |
| 33. | South Korea | 3,263,887 | 2018 | |
| 42. | Spain | 2,682,410 | 2018 | |
| 59. | Sri Lanka | 1,624,133 | 2018 | |
| 24. | Sudan | 4,431,435 | 2018 | |
| 170. | Suriname | 49,150 | 2018 | |
| 151. | Swaziland | 149,632 | 2018 | |
| 91. | Sweden | 663,953 | 2018 | |
| 109. | Switzerland | 498,786 | 2018 | |
| 50. | Syria | 2,190,975 | 2018 | |
| 61. | Taiwan | 1,578,587 | 2018 | |
| 86. | Tajikistan | 825,194 | 2018 | |
| 25. | Tanzania | 4,351,066 | 2018 |
