The World: Population - Age 0-4 (2020) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 57. | Zimbabwe | 2,266,129 | 2020 | |
| 41. | Zambia | 3,164,323 | 2020 | |
| 35. | Yemen | 3,705,139 | 2020 | |
| 159. | Western Sahara | 84,590 | 2020 | |
| 118. | West Bank | 319,767 | 2020 | |
| 222. | Wallis and Futuna | 1,043 | 2020 | |
| 16. | Vietnam | 7,230,008 | 2020 | |
| 49. | Venezuela | 2,769,205 | 2020 | |
| 179. | Vanuatu | 22,091 | 2020 | |
| 54. | Uzbekistan | 2,426,573 | 2020 | |
| 138. | Uruguay | 216,310 | 2020 | |
| 4. | United States of America | 22,396,952 | 2020 | |
| 31. | United Kingdom | 3,899,509 | 2020 | |
| 103. | United Arab Emirates | 503,263 | 2020 | |
| 64. | Ukraine | 1,909,435 | 2020 | |
| 14. | Uganda | 9,420,091 | 2020 | |
| 200. | U.S. Virgin Islands | 5,874 | 2020 | |
| 219. | Tuvalu | 1,242 | 2020 | |
| 204. | Turks and Caicos Islands | 4,012 | 2020 | |
| 105. | Turkmenistan | 490,729 | 2020 | |
| 18. | Turkey | 6,553,729 | 2020 | |
| 89. | Tunisia | 873,880 | 2020 | |
| 163. | Trinidad and Tobago | 72,653 | 2020 | |
| 187. | Tonga | 11,012 | 2020 | |
| 75. | Togo | 1,265,616 | 2020 | |
| 130. | The Gambia | 270,620 | 2020 | |
| 177. | The Bahamas | 24,815 | 2020 | |
| 30. | Thailand | 4,104,737 | 2020 | |
| 20. | Tanzania | 6,101,818 | 2020 | |
| 83. | Tajikistan | 945,359 | 2020 | |
| 81. | Taiwan | 972,195 | 2020 | |
| 53. | Syria | 2,441,951 | 2020 | |
| 114. | Switzerland | 366,622 | 2020 | |
| 104. | Sweden | 494,577 | 2020 | |
| 147. | Swaziland | 166,492 | 2020 | |
| 169. | Suriname | 45,374 | 2020 | |
| 15. | Sudan | 8,174,724 | 2020 | |
| 71. | Sri Lanka | 1,666,985 | 2020 | |
| 56. | Spain | 2,282,517 | 2020 | |
| 61. | South Korea | 1,999,847 | 2020 | |
| 28. | South Africa | 4,262,619 | 2020 | |
| 62. | Somalia | 1,915,790 | 2020 | |
| 162. | Solomon Islands | 77,570 | 2020 | |
| 161. | Slovenia | 79,254 | 2020 | |
| 133. | Slovakia | 262,326 | 2020 | |
| 212. | Sint Maarten | 2,750 | 2020 | |
| 128. | Singapore | 272,104 | 2020 | |
| 79. | Sierra Leone | 1,033,694 | 2020 | |
| 199. | Seychelles | 6,103 | 2020 | |
| 119. | Serbia | 314,810 | 2020 | |
| 55. | Senegal | 2,304,875 | 2020 | |
| 52. | Saudi Arabia | 2,610,407 | 2020 | |
| 175. | Sao Tome and Principe | 29,074 | 2020 | |
| 217. | San Marino | 1,545 | 2020 | |
| 184. | Samoa | 19,550 | 2020 | |
| 197. | Saint Vincent and the Grenadines | 6,464 | 2020 | |
| 228. | Saint Pierre and Miquelon | 201 | 2020 | |
| 213. | Saint Martin | 2,638 | 2020 | |
| 189. | Saint Lucia | 10,455 | 2020 | |
| 209. | Saint Kitts and Nevis | 3,480 | 2020 | |
| 225. | Saint Helena | 367 | 2020 | |
| 226. | Saint Barthélemy | 338 | 2020 | |
| 60. | Rwanda | 2,046,759 | 2020 | |
| 19. | Russia | 6,544,341 | 2020 | |
| 85. | Romania | 936,303 | 2020 | |
| 87. | Republic of Congo | 876,975 | 2020 | |
| 153. | Qatar | 113,194 | 2020 | |
| 140. | Puerto Rico | 212,276 | 2020 | |
| 106. | Portugal | 489,390 | 2020 | |
| 69. | Poland | 1,753,632 | 2020 | |
| 10. | Philippines | 12,941,147 | 2020 | |
| 50. | Peru | 2,691,803 | 2020 | |
| 98. | Paraguay | 566,849 | 2020 | |
| 92. | Papua New Guinea | 783,951 | 2020 | |
| 117. | Panama | 330,452 | 2020 | |
| 220. | Palau | 1,190 | 2020 | |
| 5. | Pakistan | 21,070,694 | 2020 | |
| 111. | Oman | 407,986 | 2020 | |
| 132. | Norway | 266,033 | 2020 | |
| 207. | Northern Mariana Islands | 3,687 | 2020 | |
| 68. | North Korea | 1,799,113 | 2020 | |
| 3. | Nigeria | 32,986,308 | 2020 | |
| 27. | Niger | 4,381,067 | 2020 | |
| 102. | Nicaragua | 519,489 | 2020 | |
| 122. | New Zealand | 297,035 | 2020 | |
| 181. | New Caledonia | 20,805 | 2020 | |
| 190. | Netherlands Antilles | 10,047 | 2020 | |
| 86. | Netherlands | 932,505 | 2020 | |
| 40. | Nepal | 3,198,784 | 2020 | |
| 221. | Nauru | 1,049 | 2020 | |
| 142. | Namibia | 202,804 | 2020 | |
| 23. | Myanmar | 4,925,631 | 2020 | |
| 25. | Mozambique | 4,725,784 | 2020 | |
| 47. | Morocco | 2,911,773 | 2020 | |
| 227. | Montserrat | 290 | 2020 | |
| 173. | Montenegro | 31,469 | 2020 | |
| 120. | Mongolia | 308,343 | 2020 | |
| 223. | Monaco | 887 | 2020 | |
| 145. | Moldova | 192,206 | 2020 | |
| 12. | Mexico | 10,410,948 | 2020 |
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