| # | Flag | Country | Pupil-teacher ratio, preprimaryPupil-teacher ratio, preprimary | Year |
|---|---|---|---|---|
| 1 | Tanzania | 113 | 2017 | |
| 2 | United Kingdom | 73 | 2016 | |
| 3 | Gambia | 48 | 2018 | |
| 4 | Liberia | 47 | 2016 | |
| 5 | Central African Republic | 44 | 2011 | |
| 6 | Malawi | 42 | 2015 | |
| 7 | Papua New Guinea | 41 | 2016 | |
| 8 | Canada | 39 | 1996 | |
| 9 | Zimbabwe | 37 | 2013 | |
| 10 | Namibia | 37 | 2017 | |
| 11 | Cambodia | 34 | 2017 | |
| 12 | South Sudan | 34 | 2015 | |
| 13 | Philippines | 33 | 2016 | |
| 14 | Mongolia | 33 | 2017 | |
| 15 | Guinea | 33 | 2010 | |
| 16 | East Timor | 33 | 2017 | |
| 17 | Rwanda | 32 | 2017 | |
| 18 | Burundi | 32 | 2017 | |
| 19 | Bolivia | 32 | 2017 | |
| 20 | Angola | 31 | 2011 | |
| 21 | Chad | 31 | 2016 | |
| 22 | Gabon | 30 | 2001 | |
| 23 | Israel | 30 | 1990 | |
| 24 | Guam | 29 | 1984 | |
| 25 | United Arab Emirates | 29 | 2016 | |
| 26 | South Africa | 29 | 2014 | |
| 27 | Togo | 29 | 2017 | |
| 28 | Eritrea | 29 | 2017 | |
| 29 | Nigeria | 28 | 2008 | |
| 30 | Ghana | 28 | 2018 | |
| 31 | Niger | 28 | 2017 | |
| 32 | Kenya | 28 | 2016 | |
| 33 | Guinea-Bissau | 28 | 2010 | |
| 34 | Japan | 27 | 2016 | |
| 35 | El Salvador | 27 | 2017 | |
| 36 | Suriname | 27 | 2017 | |
| 37 | Ethiopia | 27 | 2011 | |
| 38 | Iran | 26 | 2005 | |
| 39 | Yemen | 26 | 2016 | |
| 40 | Uruguay | 26 | 2010 | |
| 41 | Mozambique | 26 | 1973 | |
| 42 | Solomon Islands | 26 | 2017 | |
| 43 | Kyrgyzstan | 26 | 2011 | |
| 44 | Egypt | 26 | 2017 | |
| 45 | Republic of the Congo | 25 | 2012 | |
| 46 | Mexico | 25 | 2017 | |
| 47 | Colombia | 25 | 2011 | |
| 48 | Algeria | 25 | 2011 | |
| 49 | Chile | 25 | 2017 | |
| 50 | Sudan | 25 | 2017 | |
| 51 | French Polynesia | 25 | 1996 | |
| 52 | New Caledonia | 24 | 1991 | |
| 53 | Paraguay | 24 | 2012 | |
| 54 | Democratic Republic Of Congo | 23 | 2015 | |
| 55 | Bangladesh | 23 | 2002 | |
| 56 | Republic of Ireland | 23 | 1997 | |
| 57 | Singapore | 23 | 1989 | |
| 58 | Cuba | 22 | 1997 | |
| 59 | Senegal | 22 | 2017 | |
| 60 | Ivory Coast | 22 | 2017 | |
| 61 | The Bahamas | 22 | 2016 | |
| 62 | Oman | 22 | 2017 | |
| 63 | Nauru | 22 | 2016 | |
| 64 | Uganda | 22 | 2017 | |
| 65 | Venezuela | 22 | 1997 | |
| 66 | Madagascar | 22 | 2017 | |
| 67 | American Samoa | 21 | 1992 | |
| 68 | Ecuador | 21 | 2016 | |
| 69 | Nicaragua | 21 | 2010 | |
| 70 | Hong Kong | 21 | 1996 | |
| 71 | Virgin Islands (US) | 21 | 1993 | |
| 72 | Haiti | 21 | 1985 | |
| 73 | India | 20 | 2015 | |
| 74 | Comoros | 20 | 2017 | |
| 75 | Thailand | 20 | 1993 | |
| 76 | Cameroon | 20 | 2017 | |
| 77 | France | 20 | 2013 | |
| 78 | Nepal | 20 | 2017 | |
| 79 | Mali | 20 | 2017 | |
| 80 | Dominican Republic | 19 | 2017 | |
| 81 | Argentina | 19 | 2008 | |
| 82 | Aruba | 19 | 2012 | |
| 83 | Benin | 19 | 2016 | |
| 84 | Fiji | 19 | 2006 | |
| 85 | Guatemala | 19 | 2012 | |
| 86 | Honduras | 19 | 2016 | |
| 87 | Monaco | 19 | 2017 | |
| 88 | Mauritania | 19 | 2015 | |
| 89 | Peru | 19 | 2018 | |
| 90 | Cape Verde | 18 | 2017 | |
| 91 | Lesotho | 18 | 2016 | |
| 92 | Laos | 18 | 2017 | |
| 93 | China | 18 | 2017 | |
| 94 | Myanmar | 18 | 2017 | |
| 95 | Morocco | 18 | 2012 | |
| 96 | Montenegro | 17 | 2011 | |
| 97 | Puerto Rico | 17 | 2016 | |
| 98 | Jordan | 17 | 2017 | |
| 99 | Palau | 17 | 2014 | |
| 100 | Vietnam | 17 | 2017 | |
| 101 | Burkina Faso | 17 | 2017 | |
| 102 | Albania | 17 | 2017 | |
| 103 | Turkey | 17 | 2015 | |
| 104 | Barbados | 16 | 2017 | |
| 105 | Brazil | 16 | 2016 | |
| 106 | Seychelles | 16 | 2017 | |
| 107 | Brunei | 16 | 2017 | |
| 108 | Equatorial Guinea | 16 | 2015 | |
| 109 | Belize | 16 | 2017 | |
| 110 | Portugal | 16 | 2016 | |
| 111 | Panama | 15 | 2016 | |
| 112 | Azerbaijan | 15 | 2017 | |
| 113 | Lebanon | 15 | 2017 | |
| 114 | Vanuatu | 15 | 2015 | |
| 115 | Iraq | 15 | 2007 | |
| 116 | Tunisia | 15 | 2016 | |
| 117 | Guyana | 15 | 2012 | |
| 118 | Maldives | 15 | 2017 | |
| 119 | Syria | 15 | 2013 | |
| 120 | Malaysia | 15 | 2017 | |
| 121 | Netherlands | 15 | 2016 | |
| 122 | Romania | 15 | 2016 | |
| 123 | Qatar | 14 | 2017 | |
| 124 | Bosnia and Herzegovina | 14 | 2017 | |
| 125 | Macao | 14 | 2017 | |
| 126 | Djibouti | 14 | 2018 | |
| 127 | Spain | 13 | 2016 | |
| 128 | São Tomé and Príncipe | 13 | 2015 | |
| 129 | Andorra | 13 | 2017 | |
| 130 | Sierra Leone | 13 | 2017 | |
| 131 | Bahrain | 13 | 2017 | |
| 132 | South Korea | 13 | 2016 | |
| 133 | Samoa | 13 | 2017 | |
| 134 | Moldova | 13 | 2017 | |
| 135 | Czech Republic | 13 | 2013 | |
| 136 | Trinidad and Tobago | 13 | 2007 | |
| 137 | United States | 13 | 2015 | |
| 138 | Italy | 12 | 2016 | |
| 139 | Indonesia | 12 | 2017 | |
| 140 | Croatia | 12 | 2016 | |
| 141 | Malta | 12 | 2016 | |
| 142 | Mauritius | 12 | 2016 | |
| 143 | Grenada | 12 | 2017 | |
| 144 | Cyprus | 12 | 2015 | |
| 145 | Poland | 12 | 2016 | |
| 146 | Slovakia | 12 | 2015 | |
| 147 | Swaziland | 12 | 2011 | |
| 148 | Bulgaria | 12 | 2016 | |
| 149 | Belgium | 12 | 2016 | |
| 150 | Switzerland | 11 | 2016 | |
| 151 | Costa Rica | 11 | 2016 | |
| 152 | Austria | 11 | 2017 | |
| 153 | Serbia | 11 | 2017 | |
| 154 | Dominica | 11 | 2016 | |
| 155 | Hungary | 11 | 2016 | |
| 156 | Botswana | 11 | 2013 | |
| 157 | Uzbekistan | 11 | 2017 | |
| 158 | Finland | 11 | 2016 | |
| 159 | Turks And Caicos Islands | 11 | 2003 | |
| 160 | Saudi Arabia | 11 | 2017 | |
| 161 | Tajikistan | 11 | 2017 | |
| 162 | Marshall Islands | 11 | 2002 | |
| 163 | Luxembourg | 10 | 2016 | |
| 164 | Greece | 10 | 2016 | |
| 165 | Tuvalu | 10 | 2016 | |
| 166 | Norway | 10 | 2016 | |
| 167 | Georgia | 10 | 2007 | |
| 168 | Saint Kitts And Nevis | 10 | 2015 | |
| 169 | Jamaica | 10 | 2016 | |
| 170 | Bhutan | 10 | 2017 | |
| 171 | Tonga | 10 | 2015 | |
| 172 | Latvia | 9 | 2016 | |
| 173 | Ukraine | 9 | 2012 | |
| 174 | Kazakhstan | 9 | 2014 | |
| 175 | Slovenia | 9 | 2016 | |
| 176 | Lithuania | 9 | 2016 | |
| 177 | Cayman Islands | 8 | 2012 | |
| 178 | Kuwait | 8 | 2017 | |
| 179 | Bermuda | 8 | 2014 | |
| 180 | Libya | 8 | 2006 | |
| 181 | Virgin Islands (British) | 8 | 2016 | |
| 182 | Liechtenstein | 8 | 2016 | |
| 183 | Russia | 8 | 1994 | |
| 184 | Armenia | 8 | 2017 | |
| 185 | Saint Vincent and the Grenadines | 7 | 2017 | |
| 186 | San Marino | 7 | 2012 | |
| 187 | Belarus | 7 | 2017 | |
| 188 | Germany | 7 | 2016 | |
| 189 | New Zealand | 7 | 2017 | |
| 190 | Republic of Macedonia | 7 | 2012 | |
| 191 | Antigua and Barbuda | 7 | 2015 | |
| 192 | Afghanistan | 7 | 2003 | |
| 193 | Estonia | 6 | 2012 | |
| 194 | Denmark | 5 | 2001 | |
| 195 | Sweden | 5 | 2016 | |
| 196 | Saint Lucia | 5 | 2016 | |
| 197 | Iceland | 4 | 2015 |