| # | Flag | Country | Population ages 0-14 (% of total)Population ages 0-14 (% of total) | Year |
|---|---|---|---|---|
| 1 | Niger | 50.12% | 2018 | |
| 2 | Mali | 47.53% | 2018 | |
| 3 | Uganda | 47.41% | 2018 | |
| 4 | Chad | 46.86% | 2018 | |
| 5 | Angola | 46.62% | 2018 | |
| 6 | Somalia | 46.33% | 2018 | |
| 7 | Democratic Republic Of Congo | 46.16% | 2018 | |
| 8 | Burundi | 45.09% | 2018 | |
| 9 | Gambia | 45.07% | 2018 | |
| 10 | Burkina Faso | 44.95% | 2018 | |
| 11 | Tanzania | 44.69% | 2018 | |
| 12 | Mozambique | 44.52% | 2018 | |
| 13 | Zambia | 44.46% | 2018 | |
| 14 | Nigeria | 43.84% | 2018 | |
| 15 | Malawi | 43.74% | 2018 | |
| 16 | East Timor | 43.52% | 2018 | |
| 17 | Central African Republic | 42.84% | 2018 | |
| 18 | Senegal | 42.72% | 2018 | |
| 19 | Afghanistan | 42.64% | 2018 | |
| 20 | Cameroon | 42.5% | 2018 | |
| 21 | Benin | 42.45% | 2018 | |
| 22 | São Tomé and Príncipe | 42.44% | 2018 | |
| 23 | Ivory Coast | 42.28% | 2018 | |
| 24 | Republic of the Congo | 42.11% | 2018 | |
| 25 | Guinea | 42.03% | 2018 | |
| 26 | Eritrea | 41.8% | 2011 | |
| 27 | Sierra Leone | 41.75% | 2018 | |
| 28 | Liberia | 41.49% | 2018 | |
| 29 | South Sudan | 41.46% | 2018 | |
| 30 | Guinea-Bissau | 41.34% | 2018 | |
| 31 | Togo | 41.3% | 2018 | |
| 32 | Zimbabwe | 40.97% | 2018 | |
| 33 | Madagascar | 40.66% | 2018 | |
| 34 | Sudan | 40.47% | 2018 | |
| 35 | Iraq | 40.25% | 2018 | |
| 36 | Kenya | 40.06% | 2018 | |
| 37 | Ethiopia | 40% | 2018 | |
| 38 | Rwanda | 39.78% | 2018 | |
| 39 | Mauritania | 39.72% | 2018 | |
| 40 | Yemen | 39.56% | 2018 | |
| 41 | Comoros | 39.54% | 2018 | |
| 42 | Solomon Islands | 38.47% | 2018 | |
| 43 | Ghana | 38.34% | 2018 | |
| 44 | Equatorial Guinea | 37.03% | 2018 | |
| 45 | Swaziland | 37% | 2018 | |
| 46 | Namibia | 36.47% | 2018 | |
| 47 | Samoa | 36.35% | 2018 | |
| 48 | Gabon | 35.89% | 2018 | |
| 49 | Vanuatu | 35.77% | 2018 | |
| 50 | Syria | 35.75% | 2018 | |
| 51 | Papua New Guinea | 35.6% | 2018 | |
| 52 | Tonga | 35.36% | 2018 | |
| 53 | Tajikistan | 35.35% | 2018 | |
| 54 | Kiribati | 35.31% | 2018 | |
| 55 | Lesotho | 35.25% | 2018 | |
| 56 | Jordan | 35.19% | 2018 | |
| 57 | Pakistan | 34.67% | 2018 | |
| 58 | Guatemala | 34.43% | 2018 | |
| 59 | Egypt | 33.33% | 2018 | |
| 60 | Federated States of Micronesia | 32.74% | 2018 | |
| 61 | Haiti | 32.62% | 2018 | |
| 62 | Laos | 32.53% | 2018 | |
| 63 | Kyrgyzstan | 32.11% | 2018 | |
| 64 | Philippines | 31.48% | 2018 | |
| 65 | Bolivia | 31.26% | 2018 | |
| 66 | Cambodia | 31.21% | 2018 | |
| 67 | Botswana | 31.16% | 2018 | |
| 68 | Honduras | 31.02% | 2018 | |
| 69 | Belize | 30.89% | 2018 | |
| 70 | Turkmenistan | 30.82% | 2018 | |
| 71 | Djibouti | 30.59% | 2018 | |
| 72 | Nepal | 30.17% | 2018 | |
| 73 | Mongolia | 29.92% | 2018 | |
| 74 | Cape Verde | 29.8% | 2018 | |
| 75 | Algeria | 29.49% | 2018 | |
| 76 | Paraguay | 29.14% | 2018 | |
| 77 | Dominican Republic | 28.95% | 2018 | |
| 78 | South Africa | 28.78% | 2018 | |
| 79 | Guyana | 28.6% | 2018 | |
| 80 | Nicaragua | 28.59% | 2018 | |
| 81 | Kazakhstan | 28.34% | 2018 | |
| 82 | Fiji | 28.34% | 2018 | |
| 83 | Ecuador | 28.17% | 2018 | |
| 84 | Uzbekistan | 28.02% | 2018 | |
| 85 | Libya | 27.86% | 2018 | |
| 86 | Bangladesh | 27.84% | 2018 | |
| 87 | Israel | 27.76% | 2018 | |
| 88 | India | 27.4% | 2018 | |
| 89 | Venezuela | 27.29% | 2018 | |
| 90 | Morocco | 27.16% | 2018 | |
| 91 | Panama | 27.13% | 2018 | |
| 92 | Peru | 27.1% | 2018 | |
| 93 | El Salvador | 27.06% | 2018 | |
| 94 | Indonesia | 27.01% | 2018 | |
| 95 | Grenada | 26.34% | 2018 | |
| 96 | Myanmar | 26.27% | 2018 | |
| 97 | Mexico | 26.25% | 2018 | |
| 98 | Bhutan | 26.22% | 2018 | |
| 99 | Suriname | 26.18% | 2018 | |
| 100 | Saudi Arabia | 24.86% | 2018 | |
| 101 | Argentina | 24.69% | 2018 | |
| 102 | Turkey | 24.57% | 2018 | |
| 103 | Guam | 24.38% | 2018 | |
| 104 | Tunisia | 24.04% | 2018 | |
| 105 | Malaysia | 24.04% | 2018 | |
| 106 | Sri Lanka | 23.73% | 2018 | |
| 107 | Iran | 23.65% | 2018 | |
| 108 | Antigua and Barbuda | 23.58% | 2018 | |
| 109 | Saint Vincent and the Grenadines | 23.53% | 2018 | |
| 110 | Maldives | 23.36% | 2018 | |
| 111 | Azerbaijan | 23.3% | 2018 | |
| 112 | Colombia | 23.07% | 2018 | |
| 113 | Vietnam | 23.03% | 2018 | |
| 114 | French Polynesia | 22.91% | 2018 | |
| 115 | Brunei | 22.64% | 2018 | |
| 116 | Jamaica | 22.64% | 2018 | |
| 117 | Lebanon | 22.56% | 2018 | |
| 118 | Seychelles | 22.38% | 2018 | |
| 119 | New Caledonia | 22.32% | 2018 | |
| 120 | Oman | 21.6% | 2018 | |
| 121 | Republic of Ireland | 21.53% | 2018 | |
| 122 | Costa Rica | 21.4% | 2018 | |
| 123 | Brazil | 21.36% | 2018 | |
| 124 | Kuwait | 21.22% | 2018 | |
| 125 | Uruguay | 20.9% | 2018 | |
| 126 | Trinidad and Tobago | 20.54% | 2018 | |
| 127 | The Bahamas | 20.49% | 2018 | |
| 128 | North Korea | 20.37% | 2018 | |
| 129 | Chile | 20.1% | 2018 | |
| 130 | Armenia | 20.07% | 2018 | |
| 131 | Iceland | 20.04% | 2018 | |
| 132 | Virgin Islands (US) | 20.04% | 2018 | |
| 133 | New Zealand | 19.75% | 2018 | |
| 134 | Georgia | 19.42% | 2018 | |
| 135 | Bahrain | 19.18% | 2018 | |
| 136 | Australia | 19.14% | 2018 | |
| 137 | Barbados | 18.92% | 2018 | |
| 138 | United States | 18.83% | 2018 | |
| 139 | Curacao | 18.54% | 2018 | |
| 140 | Saint Lucia | 18.47% | 2018 | |
| 141 | Montenegro | 17.99% | 2018 | |
| 142 | France | 17.99% | 2018 | |
| 143 | Mauritius | 17.86% | 2018 | |
| 144 | United Kingdom | 17.83% | 2018 | |
| 145 | Russia | 17.82% | 2018 | |
| 146 | Norway | 17.76% | 2018 | |
| 147 | Sweden | 17.66% | 2018 | |
| 148 | Aruba | 17.66% | 2018 | |
| 149 | Puerto Rico | 17.64% | 2018 | |
| 150 | China | 17.62% | 2018 | |
| 151 | Belgium | 17.17% | 2018 | |
| 152 | Albania | 17.11% | 2018 | |
| 153 | Belarus | 17% | 2018 | |
| 154 | Thailand | 16.99% | 2018 | |
| 155 | Cyprus | 16.78% | 2018 | |
| 156 | Republic of Macedonia | 16.58% | 2018 | |
| 157 | Estonia | 16.57% | 2018 | |
| 158 | Finland | 16.47% | 2018 | |
| 159 | Luxembourg | 16.46% | 2018 | |
| 160 | Denmark | 16.45% | 2018 | |
| 161 | Serbia | 16.33% | 2018 | |
| 162 | Netherlands | 16.23% | 2018 | |
| 163 | Canada | 16.1% | 2018 | |
| 164 | Cuba | 15.89% | 2018 | |
| 165 | Ukraine | 15.79% | 2018 | |
| 166 | Moldova | 15.77% | 2018 | |
| 167 | Latvia | 15.58% | 2018 | |
| 168 | Czech Republic | 15.53% | 2018 | |
| 169 | Slovakia | 15.46% | 2018 | |
| 170 | Romania | 15.24% | 2018 | |
| 171 | Slovenia | 15.11% | 2018 | |
| 172 | Lithuania | 14.99% | 2018 | |
| 173 | Switzerland | 14.92% | 2018 | |
| 174 | Poland | 14.87% | 2018 | |
| 175 | Singapore | 14.74% | 2018 | |
| 176 | Croatia | 14.74% | 2018 | |
| 177 | Spain | 14.6% | 2018 | |
| 178 | Malta | 14.47% | 2018 | |
| 179 | Bulgaria | 14.39% | 2018 | |
| 180 | Hungary | 14.3% | 2018 | |
| 181 | Bosnia and Herzegovina | 14.15% | 2018 | |
| 182 | Greece | 14.11% | 2018 | |
| 183 | Austria | 14.1% | 2018 | |
| 184 | United Arab Emirates | 13.89% | 2018 | |
| 185 | Qatar | 13.89% | 2018 | |
| 186 | Macao | 13.77% | 2018 | |
| 187 | Italy | 13.44% | 2018 | |
| 188 | Portugal | 13.4% | 2018 | |
| 189 | South Korea | 13.36% | 2018 | |
| 190 | Germany | 13.08% | 2018 | |
| 191 | Japan | 12.84% | 2018 | |
| 192 | Hong Kong | 11.91% | 2018 |