| # | Flag | Country | Pupil-teacher ratio, lower secondaryPupil-teacher ratio, lower secondary | Year |
|---|---|---|---|---|
| 1 | Burundi | 54 | 2017 | |
| 2 | South Sudan | 46 | 2015 | |
| 3 | Mozambique | 43 | 2013 | |
| 4 | Afghanistan | 43 | 2015 | |
| 5 | Ethiopia | 43 | 2011 | |
| 6 | Eritrea | 40 | 2017 | |
| 7 | Mauritania | 38 | 2016 | |
| 8 | Guinea | 37 | 2011 | |
| 9 | Bangladesh | 36 | 2017 | |
| 10 | Chad | 35 | 2016 | |
| 11 | Niger | 34 | 2017 | |
| 12 | Ivory Coast | 34 | 1999 | |
| 13 | Nepal | 34 | 2017 | |
| 14 | Senegal | 34 | 2008 | |
| 15 | Togo | 33 | 2011 | |
| 16 | Nigeria | 31 | 2010 | |
| 17 | Kenya | 30 | 2015 | |
| 18 | Nicaragua | 29 | 2010 | |
| 19 | Djibouti | 28 | 2018 | |
| 20 | Myanmar | 28 | 2017 | |
| 21 | Angola | 28 | 2016 | |
| 22 | El Salvador | 28 | 2017 | |
| 23 | Colombia | 26 | 2017 | |
| 24 | Nauru | 26 | 2016 | |
| 25 | Yemen | 26 | 2016 | |
| 26 | Fiji | 26 | 2012 | |
| 27 | Namibia | 25 | 2017 | |
| 28 | India | 25 | 2017 | |
| 29 | East Timor | 25 | 2011 | |
| 30 | Thailand | 25 | 2015 | |
| 31 | Bolivia | 24 | 1999 | |
| 32 | Cameroon | 24 | 2016 | |
| 33 | Morocco | 23 | 2017 | |
| 34 | Burkina Faso | 23 | 2017 | |
| 35 | Rwanda | 23 | 2017 | |
| 36 | Samoa | 23 | 2010 | |
| 37 | Ecuador | 23 | 2016 | |
| 38 | Philippines | 23 | 2016 | |
| 39 | Papua New Guinea | 22 | 2016 | |
| 40 | Mongolia | 21 | 2007 | |
| 41 | Barbados | 21 | 2017 | |
| 42 | Iran | 21 | 2017 | |
| 43 | Dominican Republic | 21 | 2015 | |
| 44 | Tajikistan | 21 | 2003 | |
| 45 | Zambia | 21 | 2014 | |
| 46 | Sierra Leone | 21 | 2017 | |
| 47 | Peru | 21 | 1999 | |
| 48 | United Kingdom | 21 | 2016 | |
| 49 | Singapore | 21 | 1996 | |
| 50 | Madagascar | 20 | 2017 | |
| 51 | Cambodia | 20 | 2017 | |
| 52 | Mali | 20 | 2017 | |
| 53 | Puerto Rico | 19 | 2016 | |
| 54 | Federated States of Micronesia | 19 | 2015 | |
| 55 | Paraguay | 19 | 2012 | |
| 56 | São Tomé and Príncipe | 19 | 2017 | |
| 57 | Republic of the Congo | 19 | 2012 | |
| 58 | Gambia | 19 | 2018 | |
| 59 | Canada | 19 | 1996 | |
| 60 | Guyana | 19 | 2012 | |
| 61 | Swaziland | 19 | 2003 | |
| 62 | Mexico | 19 | 2017 | |
| 63 | Jamaica | 19 | 2002 | |
| 64 | North Korea | 19 | 2015 | |
| 65 | Iraq | 18 | 2004 | |
| 66 | Honduras | 18 | 2017 | |
| 67 | Chile | 18 | 2017 | |
| 68 | Vanuatu | 18 | 2015 | |
| 69 | Malaysia | 17 | 2004 | |
| 70 | Brazil | 17 | 2016 | |
| 71 | Egypt | 17 | 2017 | |
| 72 | Saint Vincent and the Grenadines | 17 | 2010 | |
| 73 | Laos | 17 | 2017 | |
| 74 | Hong Kong | 17 | 2005 | |
| 75 | Algeria | 17 | 1997 | |
| 76 | Turkey | 17 | 2015 | |
| 77 | Sri Lanka | 17 | 2017 | |
| 78 | Belize | 17 | 2017 | |
| 79 | Guinea-Bissau | 17 | 2000 | |
| 80 | Syria | 16 | 1996 | |
| 81 | Vietnam | 16 | 2017 | |
| 82 | Solomon Islands | 16 | 2017 | |
| 83 | Argentina | 16 | 2008 | |
| 84 | Equatorial Guinea | 16 | 2015 | |
| 85 | Palau | 15 | 2000 | |
| 86 | Cape Verde | 15 | 2017 | |
| 87 | Indonesia | 15 | 2017 | |
| 88 | Israel | 15 | 2016 | |
| 89 | New Zealand | 15 | 2017 | |
| 90 | Pakistan | 15 | 2017 | |
| 91 | Tunisia | 15 | 2010 | |
| 92 | Tonga | 14 | 2015 | |
| 93 | Liberia | 14 | 2016 | |
| 94 | Panama | 14 | 2016 | |
| 95 | France | 14 | 2013 | |
| 96 | South Korea | 14 | 2016 | |
| 97 | United States | 14 | 2015 | |
| 98 | Kiribati | 14 | 2017 | |
| 99 | Marshall Islands | 14 | 2003 | |
| 100 | Seychelles | 14 | 1999 | |
| 101 | Trinidad and Tobago | 13 | 2009 | |
| 102 | Netherlands | 13 | 2016 | |
| 103 | Suriname | 13 | 2017 | |
| 104 | United Arab Emirates | 13 | 2016 | |
| 105 | The Bahamas | 13 | 2016 | |
| 106 | Ghana | 13 | 2018 | |
| 107 | Dominica | 13 | 2014 | |
| 108 | Bulgaria | 12 | 2016 | |
| 109 | Costa Rica | 12 | 2016 | |
| 110 | Japan | 12 | 2016 | |
| 111 | Jordan | 12 | 2017 | |
| 112 | Guatemala | 12 | 2017 | |
| 113 | Bhutan | 12 | 2017 | |
| 114 | China | 12 | 2017 | |
| 115 | Spain | 11 | 2016 | |
| 116 | South Africa | 11 | 2010 | |
| 117 | Czech Republic | 11 | 2013 | |
| 118 | Grenada | 11 | 2017 | |
| 119 | Qatar | 11 | 2017 | |
| 120 | Romania | 11 | 2016 | |
| 121 | Sweden | 11 | 2016 | |
| 122 | Saint Lucia | 11 | 2017 | |
| 123 | Cayman Islands | 11 | 2018 | |
| 124 | Benin | 11 | 2014 | |
| 125 | Saudi Arabia | 10 | 2014 | |
| 126 | Cyprus | 10 | 2015 | |
| 127 | Denmark | 10 | 2014 | |
| 128 | Italy | 10 | 2016 | |
| 129 | Macao | 10 | 2017 | |
| 130 | Germany | 10 | 2016 | |
| 131 | Uruguay | 10 | 2010 | |
| 132 | Bahrain | 10 | 2017 | |
| 133 | Monaco | 10 | 2017 | |
| 134 | Antigua and Barbuda | 10 | 2012 | |
| 135 | Oman | 10 | 2017 | |
| 136 | Albania | 10 | 2017 | |
| 137 | Brunei | 10 | 2017 | |
| 138 | Luxembourg | 10 | 2016 | |
| 139 | Slovakia | 10 | 2015 | |
| 140 | Hungary | 9 | 2016 | |
| 141 | Saint Kitts And Nevis | 9 | 2012 | |
| 142 | Moldova | 9 | 2017 | |
| 143 | Iceland | 9 | 2015 | |
| 144 | Portugal | 9 | 2016 | |
| 145 | Cuba | 9 | 2017 | |
| 146 | Tuvalu | 9 | 2016 | |
| 147 | Bosnia and Herzegovina | 8 | 2017 | |
| 148 | Belarus | 8 | 2017 | |
| 149 | Estonia | 8 | 2016 | |
| 150 | Finland | 8 | 2016 | |
| 151 | Norway | 8 | 2016 | |
| 152 | Kuwait | 8 | 2012 | |
| 153 | Republic of Macedonia | 8 | 2015 | |
| 154 | Switzerland | 8 | 2016 | |
| 155 | Uzbekistan | 8 | 2017 | |
| 156 | Belgium | 8 | 2016 | |
| 157 | Virgin Islands (British) | 8 | 2011 | |
| 158 | Poland | 8 | 2016 | |
| 159 | Turks And Caicos Islands | 8 | 2002 | |
| 160 | Austria | 7 | 2017 | |
| 161 | Latvia | 7 | 2016 | |
| 162 | Lithuania | 7 | 2016 | |
| 163 | Georgia | 7 | 2017 | |
| 164 | Greece | 7 | 2016 | |
| 165 | Croatia | 7 | 2016 | |
| 166 | Lebanon | 7 | 2017 | |
| 167 | Serbia | 7 | 2017 | |
| 168 | Andorra | 7 | 2012 | |
| 169 | San Marino | 6 | 2004 | |
| 170 | Bermuda | 6 | 2015 | |
| 171 | Malta | 6 | 2016 | |
| 172 | Comoros | 6 | 2017 | |
| 173 | Azerbaijan | 6 | 2017 | |
| 174 | Liechtenstein | 5 | 2016 | |
| 175 | Maldives | 5 | 2017 | |
| 176 | Slovenia | 5 | 2016 |