The World: Population - Age 0-4 (2015) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 27. | Thailand | 4,207,088 | 2015 | |
| 178. | The Bahamas | 24,850 | 2015 | |
| 128. | The Gambia | 272,497 | 2015 | |
| 77. | Togo | 1,161,107 | 2015 | |
| 187. | Tonga | 12,242 | 2015 | |
| 161. | Trinidad and Tobago | 82,375 | 2015 | |
| 87. | Tunisia | 898,073 | 2015 | |
| 19. | Turkey | 6,802,043 | 2015 | |
| 106. | Turkmenistan | 474,984 | 2015 | |
| 205. | Turks and Caicos Islands | 4,040 | 2015 | |
| 219. | Tuvalu | 1,173 | 2015 | |
| 199. | U.S. Virgin Islands | 6,111 | 2015 | |
| 14. | Uganda | 8,004,013 | 2015 | |
| 57. | Ukraine | 2,107,683 | 2015 | |
| 109. | United Arab Emirates | 461,085 | 2015 | |
| 31. | United Kingdom | 3,863,751 | 2015 | |
| 4. | United States of America | 21,740,424 | 2015 | |
| 141. | Uruguay | 218,880 | 2015 | |
| 55. | Uzbekistan | 2,389,262 | 2015 | |
| 179. | Vanuatu | 22,170 | 2015 | |
| 51. | Venezuela | 2,731,028 | 2015 | |
| 16. | Vietnam | 7,489,812 | 2015 | |
| 222. | Wallis and Futuna | 1,081 | 2015 | |
| 120. | West Bank | 312,781 | 2015 | |
| 162. | Western Sahara | 78,728 | 2015 | |
| 33. | Yemen | 3,781,399 | 2015 | |
| 46. | Zambia | 2,883,073 | 2015 | |
| 59. | Zimbabwe | 2,011,204 | 2015 |
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