| # | Flag | Country | Pupil-teacher ratio, primaryPupil-teacher ratio, primary | Year |
|---|---|---|---|---|
| 1 | Central African Republic | 83 | 2016 | |
| 2 | Malawi | 69 | 2015 | |
| 3 | Rwanda | 57 | 2017 | |
| 4 | Chad | 56 | 2016 | |
| 5 | Ethiopia | 55 | 2011 | |
| 6 | Mozambique | 52 | 2017 | |
| 7 | Guinea-Bissau | 51 | 2010 | |
| 8 | Angola | 50 | 2015 | |
| 9 | Burundi | 49 | 2017 | |
| 10 | Guinea | 47 | 2016 | |
| 11 | Tanzania | 47 | 2017 | |
| 12 | South Sudan | 46 | 2015 | |
| 13 | Republic of the Congo | 44 | 2012 | |
| 14 | Pakistan | 44 | 2017 | |
| 15 | Cameroon | 44 | 2017 | |
| 16 | Afghanistan | 44 | 2017 | |
| 17 | Benin | 43 | 2017 | |
| 18 | Ivory Coast | 42 | 2017 | |
| 19 | Uganda | 42 | 2017 | |
| 20 | Zambia | 42 | 2017 | |
| 21 | Cambodia | 41 | 2017 | |
| 22 | Burkina Faso | 40 | 2017 | |
| 23 | Nauru | 40 | 2016 | |
| 24 | Togo | 40 | 2017 | |
| 25 | Madagascar | 40 | 2016 | |
| 26 | Eritrea | 39 | 2017 | |
| 27 | Sierra Leone | 39 | 2017 | |
| 28 | Mali | 38 | 2017 | |
| 29 | Nigeria | 37 | 2010 | |
| 30 | Zimbabwe | 36 | 2013 | |
| 31 | Gambia | 36 | 2018 | |
| 32 | Niger | 36 | 2017 | |
| 33 | Mauritania | 36 | 2016 | |
| 34 | Papua New Guinea | 35 | 2016 | |
| 35 | India | 35 | 2016 | |
| 36 | Bhutan | 34 | 2017 | |
| 37 | Haiti | 33 | 1998 | |
| 38 | Democratic Republic Of Congo | 33 | 2015 | |
| 39 | Lesotho | 32 | 2017 | |
| 40 | Senegal | 32 | 2017 | |
| 41 | São Tomé and Príncipe | 31 | 2017 | |
| 42 | East Timor | 31 | 2011 | |
| 43 | Kenya | 30 | 2015 | |
| 44 | Nicaragua | 30 | 2010 | |
| 45 | Bangladesh | 30 | 2017 | |
| 46 | Mongolia | 30 | 2017 | |
| 47 | South Africa | 30 | 2015 | |
| 48 | Samoa | 30 | 2010 | |
| 49 | Djibouti | 29 | 2018 | |
| 50 | Namibia | 29 | 2010 | |
| 51 | Morocco | 28 | 2017 | |
| 52 | Iran | 28 | 2017 | |
| 53 | Philippines | 28 | 2016 | |
| 54 | El Salvador | 28 | 2017 | |
| 55 | Liberia | 27 | 2016 | |
| 56 | Swaziland | 27 | 2016 | |
| 57 | Ghana | 27 | 2018 | |
| 58 | Mexico | 26 | 2017 | |
| 59 | Vanuatu | 26 | 2015 | |
| 60 | Yemen | 26 | 2016 | |
| 61 | Kiribati | 25 | 2017 | |
| 62 | Venezuela | 25 | 1987 | |
| 63 | Syria | 25 | 2002 | |
| 64 | Solomon Islands | 25 | 2017 | |
| 65 | Ecuador | 25 | 2016 | |
| 66 | Honduras | 25 | 2017 | |
| 67 | Gabon | 24 | 2011 | |
| 68 | Paraguay | 24 | 2012 | |
| 69 | Kyrgyzstan | 24 | 2017 | |
| 70 | Algeria | 24 | 2017 | |
| 71 | United Arab Emirates | 24 | 2016 | |
| 72 | Colombia | 23 | 2017 | |
| 73 | Equatorial Guinea | 23 | 2015 | |
| 74 | Egypt | 23 | 2017 | |
| 75 | Guyana | 23 | 2012 | |
| 76 | Myanmar | 23 | 2017 | |
| 77 | Jamaica | 22 | 2017 | |
| 78 | Tajikistan | 22 | 2017 | |
| 79 | Sri Lanka | 22 | 2017 | |
| 80 | Laos | 22 | 2017 | |
| 81 | Botswana | 22 | 2013 | |
| 82 | Tonga | 21 | 2015 | |
| 83 | Cape Verde | 21 | 2017 | |
| 84 | Panama | 21 | 2016 | |
| 85 | Uzbekistan | 21 | 2017 | |
| 86 | Jordan | 21 | 2017 | |
| 87 | Guatemala | 20 | 2017 | |
| 88 | New Caledonia | 20 | 1991 | |
| 89 | Russia | 20 | 2016 | |
| 90 | Guam | 20 | 1989 | |
| 91 | Brazil | 20 | 2016 | |
| 92 | North Korea | 20 | 2018 | |
| 93 | Nepal | 20 | 2017 | |
| 94 | The Bahamas | 19 | 2016 | |
| 95 | Armenia | 19 | 2007 | |
| 96 | Belize | 19 | 2017 | |
| 97 | Fiji | 19 | 2016 | |
| 98 | Federated States of Micronesia | 19 | 2015 | |
| 99 | Kazakhstan | 19 | 2018 | |
| 100 | Romania | 19 | 2016 | |
| 101 | Vietnam | 19 | 2017 | |
| 102 | France | 18 | 2013 | |
| 103 | Comoros | 18 | 2017 | |
| 104 | Bolivia | 18 | 2017 | |
| 105 | Czech Republic | 18 | 2013 | |
| 106 | Belarus | 18 | 2017 | |
| 107 | Dominican Republic | 18 | 2017 | |
| 108 | Turkey | 18 | 2015 | |
| 109 | Australia | 17 | 1999 | |
| 110 | Tuvalu | 17 | 2016 | |
| 111 | Trinidad and Tobago | 17 | 2009 | |
| 112 | Bulgaria | 17 | 2016 | |
| 113 | Chile | 17 | 2017 | |
| 114 | Moldova | 17 | 2017 | |
| 115 | Canada | 17 | 2000 | |
| 116 | Mauritius | 17 | 2017 | |
| 117 | Albania | 17 | 2017 | |
| 118 | Argentina | 17 | 2008 | |
| 119 | Peru | 17 | 2018 | |
| 120 | Bosnia and Herzegovina | 17 | 2017 | |
| 121 | Tunisia | 16 | 2016 | |
| 122 | Indonesia | 16 | 2017 | |
| 123 | Thailand | 16 | 2017 | |
| 124 | Marshall Islands | 16 | 2002 | |
| 125 | South Korea | 16 | 2016 | |
| 126 | China | 16 | 2017 | |
| 127 | Grenada | 16 | 2017 | |
| 128 | Iraq | 16 | 2007 | |
| 129 | Libya | 16 | 1983 | |
| 130 | Republic of Ireland | 16 | 2012 | |
| 131 | Singapore | 15 | 2016 | |
| 132 | Saint Lucia | 15 | 2017 | |
| 133 | United Kingdom | 15 | 2016 | |
| 134 | Azerbaijan | 15 | 2017 | |
| 135 | Palau | 15 | 2000 | |
| 136 | American Samoa | 15 | 1992 | |
| 137 | Japan | 15 | 2016 | |
| 138 | Slovakia | 15 | 2015 | |
| 139 | Cayman Islands | 15 | 2018 | |
| 140 | Aruba | 14 | 2012 | |
| 141 | Republic of Macedonia | 14 | 2015 | |
| 142 | French Polynesia | 14 | 1996 | |
| 143 | Seychelles | 14 | 2017 | |
| 144 | Serbia | 14 | 2017 | |
| 145 | United States | 14 | 2015 | |
| 146 | Saint Vincent and the Grenadines | 14 | 2017 | |
| 147 | Barbados | 14 | 2017 | |
| 148 | Virgin Islands (US) | 14 | 1993 | |
| 149 | New Zealand | 14 | 2017 | |
| 150 | Hong Kong | 13 | 2017 | |
| 151 | Croatia | 13 | 2016 | |
| 152 | Malta | 13 | 2016 | |
| 153 | Dominica | 13 | 2016 | |
| 154 | Puerto Rico | 13 | 2016 | |
| 155 | Macao | 13 | 2017 | |
| 156 | Lithuania | 13 | 2016 | |
| 157 | Slovenia | 13 | 2016 | |
| 158 | Saint Kitts And Nevis | 13 | 2016 | |
| 159 | Finland | 13 | 2016 | |
| 160 | Sweden | 12 | 2016 | |
| 161 | Germany | 12 | 2016 | |
| 162 | Portugal | 12 | 2016 | |
| 163 | Lebanon | 12 | 2017 | |
| 164 | Ukraine | 12 | 2017 | |
| 165 | Spain | 12 | 2016 | |
| 166 | Suriname | 12 | 2017 | |
| 167 | Bahrain | 12 | 2017 | |
| 168 | Israel | 12 | 2016 | |
| 169 | Antigua and Barbuda | 12 | 2017 | |
| 170 | Estonia | 11 | 2016 | |
| 171 | Latvia | 11 | 2016 | |
| 172 | Italy | 11 | 2016 | |
| 173 | Malaysia | 11 | 2017 | |
| 174 | Netherlands | 11 | 2016 | |
| 175 | Qatar | 11 | 2017 | |
| 176 | Cyprus | 11 | 2015 | |
| 177 | Saudi Arabia | 11 | 2016 | |
| 178 | Costa Rica | 11 | 2016 | |
| 179 | Belgium | 11 | 2016 | |
| 180 | Uruguay | 11 | 2016 | |
| 181 | Virgin Islands (British) | 11 | 2017 | |
| 182 | Sint Maarten | 11 | 2012 | |
| 183 | Andorra | 10 | 2017 | |
| 184 | Austria | 10 | 2017 | |
| 185 | Hungary | 10 | 2016 | |
| 186 | Maldives | 10 | 2017 | |
| 187 | Brunei | 10 | 2017 | |
| 188 | Poland | 10 | 2016 | |
| 189 | Denmark | 10 | 2014 | |
| 190 | Oman | 10 | 2017 | |
| 191 | Bermuda | 10 | 2015 | |
| 192 | Iceland | 10 | 2015 | |
| 193 | Switzerland | 10 | 2016 | |
| 194 | Monaco | 10 | 2017 | |
| 195 | Turks And Caicos Islands | 9 | 2014 | |
| 196 | Norway | 9 | 2016 | |
| 197 | Georgia | 9 | 2017 | |
| 198 | Greece | 9 | 2016 | |
| 199 | Luxembourg | 8 | 2016 | |
| 200 | Kuwait | 8 | 2017 | |
| 201 | Cuba | 8 | 2017 | |
| 202 | Liechtenstein | 7 | 2016 | |
| 203 | San Marino | 6 | 2012 |