| # | Flag | Country | Women who were first married by age 18 (% of women ages 20-24)Women who were first married by age 18 (% of women ages 20-24) | Year |
|---|---|---|---|---|
| 1 | Niger | 76.3% | 2012 | |
| 2 | Central African Republic | 67.9% | 2010 | |
| 3 | Chad | 66.9% | 2015 | |
| 4 | Bangladesh | 58.6% | 2014 | |
| 5 | Mozambique | 52.9% | 2015 | |
| 6 | Burkina Faso | 51.6% | 2010 | |
| 7 | South Sudan | 51.5% | 2010 | |
| 8 | Mali | 51.5% | 2015 | |
| 9 | Guinea | 51.2% | 2016 | |
| 10 | Somalia | 45.3% | 2006 | |
| 11 | Nigeria | 43.5% | 2017 | |
| 12 | Malawi | 42.1% | 2016 | |
| 13 | Madagascar | 41.2% | 2013 | |
| 14 | Eritrea | 40.7% | 2010 | |
| 15 | Ethiopia | 40.3% | 2016 | |
| 16 | Nepal | 39.5% | 2016 | |
| 17 | Sierra Leone | 38.9% | 2013 | |
| 18 | Democratic Republic Of Congo | 37.3% | 2014 | |
| 19 | Mauritania | 37% | 2015 | |
| 20 | Dominican Republic | 35.9% | 2014 | |
| 21 | Liberia | 35.9% | 2013 | |
| 22 | Brazil | 35.6% | 2006 | |
| 23 | Laos | 35.4% | 2012 | |
| 24 | São Tomé and Príncipe | 35.4% | 2014 | |
| 25 | Nicaragua | 35.2% | 2012 | |
| 26 | Afghanistan | 34.8% | 2015 | |
| 27 | Sudan | 34.2% | 2014 | |
| 28 | Uganda | 34% | 2016 | |
| 29 | Honduras | 33.6% | 2012 | |
| 30 | Zimbabwe | 32.4% | 2015 | |
| 31 | Yemen | 31.9% | 2013 | |
| 32 | Comoros | 31.6% | 2012 | |
| 33 | Zambia | 31.4% | 2014 | |
| 34 | Cameroon | 31% | 2014 | |
| 35 | Benin | 30.6% | 2018 | |
| 36 | Tanzania | 30.5% | 2016 | |
| 37 | Gambia | 30.4% | 2013 | |
| 38 | Angola | 30.3% | 2016 | |
| 39 | Guyana | 30.2% | 2014 | |
| 40 | Guatemala | 29.5% | 2015 | |
| 41 | Equatorial Guinea | 29.5% | 2011 | |
| 42 | Senegal | 28.8% | 2017 | |
| 43 | Republic of the Congo | 27.3% | 2015 | |
| 44 | Ivory Coast | 27% | 2016 | |
| 45 | Nauru | 26.8% | 2007 | |
| 46 | Panama | 26.4% | 2013 | |
| 47 | Marshall Islands | 26.3% | 2007 | |
| 48 | Mexico | 26.1% | 2015 | |
| 49 | Cuba | 26% | 2014 | |
| 50 | Belize | 25.9% | 2011 | |
| 51 | Bhutan | 25.8% | 2010 | |
| 52 | El Salvador | 25.5% | 2014 | |
| 53 | India | 25.3% | 2016 | |
| 54 | Uruguay | 24.6% | 2013 | |
| 55 | Guinea-Bissau | 24.4% | 2014 | |
| 56 | Iraq | 24.3% | 2011 | |
| 57 | Colombia | 23.4% | 2015 | |
| 58 | Kenya | 22.9% | 2014 | |
| 59 | Thailand | 22.5% | 2015 | |
| 60 | Ecuador | 22.2% | 2004 | |
| 61 | Gabon | 21.9% | 2012 | |
| 62 | Togo | 21.8% | 2014 | |
| 63 | Paraguay | 21.6% | 2016 | |
| 64 | Peru | 21.5% | 2015 | |
| 65 | Vanuatu | 21.4% | 2013 | |
| 66 | Papua New Guinea | 21.3% | 2006 | |
| 67 | Solomon Islands | 21.3% | 2015 | |
| 68 | Costa Rica | 21.2% | 2011 | |
| 69 | Ghana | 20.7% | 2014 | |
| 70 | Kiribati | 20.3% | 2009 | |
| 71 | Bolivia | 19.4% | 2015 | |
| 72 | Burundi | 19% | 2017 | |
| 73 | Suriname | 18.8% | 2010 | |
| 74 | Cambodia | 18.5% | 2014 | |
| 75 | Pakistan | 18.3% | 2018 | |
| 76 | Cape Verde | 18% | 2005 | |
| 77 | Egypt | 17.4% | 2014 | |
| 78 | Lesotho | 17.3% | 2014 | |
| 79 | Iran | 17% | 2011 | |
| 80 | Philippines | 16.5% | 2017 | |
| 81 | Myanmar | 16% | 2016 | |
| 82 | Morocco | 15.9% | 2004 | |
| 83 | Haiti | 14.9% | 2017 | |
| 84 | East Timor | 14.9% | 2016 | |
| 85 | Turkey | 14.7% | 2013 | |
| 86 | Georgia | 14% | 2010 | |
| 87 | Indonesia | 13.6% | 2013 | |
| 88 | Syria | 13.3% | 2006 | |
| 89 | Moldova | 12.2% | 2012 | |
| 90 | Sri Lanka | 11.8% | 2007 | |
| 91 | Albania | 11.8% | 2018 | |
| 92 | Kyrgyzstan | 11.6% | 2014 | |
| 93 | Trinidad and Tobago | 11.2% | 2011 | |
| 94 | Azerbaijan | 11% | 2011 | |
| 95 | Samoa | 10.8% | 2014 | |
| 96 | Barbados | 10.7% | 2012 | |
| 97 | Vietnam | 10.6% | 2014 | |
| 98 | Botswana | 10% | 1988 | |
| 99 | Tuvalu | 9.9% | 2007 | |
| 100 | Jordan | 9.7% | 2018 | |
| 101 | Ukraine | 9.1% | 2012 | |
| 102 | Tajikistan | 8.7% | 2017 | |
| 103 | Jamaica | 7.9% | 2011 | |
| 104 | Saint Lucia | 7.5% | 2012 | |
| 105 | Uzbekistan | 7.2% | 2006 | |
| 106 | Kazakhstan | 7% | 2015 | |
| 107 | Republic of Macedonia | 6.9% | 2011 | |
| 108 | Namibia | 6.9% | 2013 | |
| 109 | Rwanda | 6.8% | 2015 | |
| 110 | Lebanon | 6.1% | 2009 | |
| 111 | Turkmenistan | 5.7% | 2016 | |
| 112 | Tonga | 5.6% | 2012 | |
| 113 | Djibouti | 5.4% | 2006 | |
| 114 | Swaziland | 5.3% | 2014 | |
| 115 | Armenia | 5.3% | 2016 | |
| 116 | Mongolia | 5.2% | 2013 | |
| 117 | Montenegro | 4.5% | 2013 | |
| 118 | Qatar | 4.2% | 2012 | |
| 119 | South Africa | 3.6% | 2016 | |
| 120 | Bosnia and Herzegovina | 3.5% | 2012 | |
| 121 | Belarus | 3.2% | 2012 | |
| 122 | Serbia | 3.2% | 2014 | |
| 123 | Algeria | 2.5% | 2013 | |
| 124 | Maldives | 2.2% | 2017 | |
| 125 | Tunisia | 1.6% | 2012 |