The World: Population - Age 0-4 (2021) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 101. | Nicaragua | 519,174 | 2021 | |
| 102. | Belgium | 518,824 | 2021 | |
| 103. | United Arab Emirates | 509,942 | 2021 | |
| 104. | Sweden | 497,771 | 2021 | |
| 105. | Turkmenistan | 490,298 | 2021 | |
| 106. | Portugal | 484,517 | 2021 | |
| 107. | El Salvador | 479,319 | 2021 | |
| 108. | Greece | 444,325 | 2021 | |
| 109. | Hungary | 436,570 | 2021 | |
| 110. | Oman | 411,075 | 2021 | |
| 111. | Belarus | 410,663 | 2021 | |
| 112. | Czech Republic | 401,331 | 2021 | |
| 113. | Costa Rica | 377,486 | 2021 | |
| 114. | Switzerland | 366,666 | 2021 | |
| 115. | Austria | 365,893 | 2021 | |
| 116. | Ireland | 346,725 | 2021 | |
| 117. | Panama | 329,964 | 2021 | |
| 118. | West Bank | 320,828 | 2021 | |
| 119. | Serbia | 311,291 | 2021 | |
| 120. | Mongolia | 305,339 | 2021 | |
| 121. | Denmark | 301,709 | 2021 | |
| 122. | New Zealand | 297,510 | 2021 | |
| 123. | Gabon | 292,725 | 2021 | |
| 124. | Lebanon | 284,808 | 2021 | |
| 125. | Hong Kong | 280,215 | 2021 | |
| 126. | Singapore | 280,120 | 2021 | |
| 127. | Gaza Strip | 273,193 | 2021 | |
| 128. | Finland | 270,576 | 2021 | |
| 129. | The Gambia | 269,518 | 2021 | |
| 130. | Norway | 268,305 | 2021 | |
| 131. | Bulgaria | 267,582 | 2021 | |
| 132. | Kuwait | 265,574 | 2021 | |
| 133. | Guinea-Bissau | 263,516 | 2021 | |
| 134. | Jamaica | 259,945 | 2021 | |
| 135. | Slovakia | 257,749 | 2021 | |
| 136. | Botswana | 232,705 | 2021 | |
| 137. | Georgia | 219,546 | 2021 | |
| 138. | Uruguay | 216,313 | 2021 | |
| 139. | Puerto Rico | 210,475 | 2021 | |
| 140. | Lesotho | 209,850 | 2021 | |
| 141. | Croatia | 205,678 | 2021 | |
| 142. | Namibia | 200,967 | 2021 | |
| 143. | Albania | 197,010 | 2021 | |
| 144. | Bosnia and Herzegovina | 194,676 | 2021 | |
| 145. | Moldova | 185,749 | 2021 | |
| 146. | Armenia | 170,686 | 2021 | |
| 147. | Swaziland | 165,982 | 2021 | |
| 148. | Lithuania | 153,925 | 2021 | |
| 149. | East Timor | 148,955 | 2021 | |
| 150. | Kosovo | 146,914 | 2021 | |
| 151. | Equatorial Guinea | 117,856 | 2021 | |
| 152. | Macedonia | 116,822 | 2021 | |
| 153. | Qatar | 114,126 | 2021 | |
| 154. | Djibouti | 98,528 | 2021 | |
| 155. | Comoros | 96,147 | 2021 | |
| 156. | Bahrain | 94,967 | 2021 | |
| 157. | Latvia | 91,261 | 2021 | |
| 158. | Mauritius | 86,598 | 2021 | |
| 159. | Western Sahara | 85,616 | 2021 | |
| 160. | Fiji | 80,764 | 2021 | |
| 161. | Solomon Islands | 77,727 | 2021 | |
| 162. | Slovenia | 77,679 | 2021 | |
| 163. | Trinidad and Tobago | 70,061 | 2021 | |
| 164. | Cyprus | 69,144 | 2021 | |
| 165. | Bhutan | 62,548 | 2021 | |
| 166. | Estonia | 57,528 | 2021 | |
| 167. | Guyana | 56,191 | 2021 | |
| 168. | Cape Verde | 54,116 | 2021 | |
| 169. | Suriname | 45,053 | 2021 | |
| 170. | Belize | 42,372 | 2021 | |
| 171. | Brunei | 37,266 | 2021 | |
| 172. | Luxembourg | 33,454 | 2021 | |
| 173. | Montenegro | 30,922 | 2021 | |
| 174. | Maldives | 30,715 | 2021 | |
| 175. | Sao Tome and Principe | 28,785 | 2021 | |
| 176. | Macau | 25,736 | 2021 | |
| 177. | The Bahamas | 24,774 | 2021 | |
| 178. | Mayotte | 23,974 | 2021 | |
| 179. | Vanuatu | 22,041 | 2021 | |
| 180. | New Caledonia | 20,844 | 2021 | |
| 181. | Iceland | 20,785 | 2021 | |
| 182. | French Polynesia | 20,738 | 2021 | |
| 183. | Malta | 20,585 | 2021 | |
| 184. | Samoa | 19,447 | 2021 | |
| 185. | Barbados | 16,636 | 2021 | |
| 186. | Guam | 16,248 | 2021 | |
| 187. | Kiribati | 10,849 | 2021 | |
| 188. | Tonga | 10,797 | 2021 | |
| 189. | Saint Lucia | 10,300 | 2021 | |
| 190. | Netherlands Antilles | 10,021 | 2021 | |
| 191. | Federated States of Micronesia | 9,365 | 2021 | |
| 192. | Marshall Islands | 8,539 | 2021 | |
| 193. | Grenada | 8,349 | 2021 | |
| 194. | American Samoa | 7,720 | 2021 | |
| 195. | Antigua and Barbuda | 7,536 | 2021 | |
| 196. | Aruba | 7,150 | 2021 | |
| 197. | Saint Vincent and the Grenadines | 6,365 | 2021 | |
| 198. | Channel Islands | 6,272 | 2021 | |
| 199. | Seychelles | 6,023 | 2021 | |
| 200. | U.S. Virgin Islands | 5,814 | 2021 |
