The GEF has 186 member countries. In the Instrument, GEF member countries are referred to as participants. In general terms there are developed and developing participants in the GEF. They are represented on the GEF Council by 32 constituencies (14 for developed countries, 16 for developing countries, and 2 for economies in transition) each one having a Council member and an alternate Council member. Representatives of all member countries meet every four years during the GEF Assembly.
| Participants | Date of Participation |
|---|---|
| A | |
| Afghanistan | 04/07/1994 |
| Albania | 05/06/1994 |
| Algeria | 05/13/1994 |
| Angola | 10/29/2009 |
| Antigua and Barbuda | 03/29/1994 |
| Argentina | 05/12/1994 |
| Armenia | 06/16/1994 |
| Australia | 06/27/1994 |
| Austria | 06/21/1994 |
| Azerbaijan | 07/24/1995 |
| B | |
| Bahamas | 04/19/1994 |
| Bahrain | 03/11/2020 |
| Bangladesh | 06/22/1994 |
| Barbados | 05/13/1994 |
| Belarus | 03/30/1994 |
| Belgium | 01/30/1995 |
| Belize | 04/29/1994 |
| Benin | 06/29/1994 |
| Bhutan | 12/12/1995 |
| Bolivia | 06/17/1994 |
| Bosnia and Herzegovina | 10/29/2001 |
| Botswana | 07/12/1994 |
| Brazil | 06/13/1994 |
| Bulgaria | 03/22/1994 |
| Burkina Faso | 08/24/1994 |
| Burundi | 03/30/1998 |
| C | |
| Cambodia | 01/31/1995 |
| Cameroon | 10/31/1994 |
| Canada | 07/06/1994 |
| Cabo Verde | 07/18/1994 |
| Central African Republic | 03/23/1995 |
| Chad | 07/27/1994 |
| Chile | 07/01/1994 |
| China | 05/16/1994 |
| Colombia | 06/28/1994 |
| Comoros | 09/05/1995 |
| Congo, Dem. Republic of | 02/06/1997 |
| Congo, Republic of | 09/22/1995 |
| Cook Islands | 05/06/1994 |
| Costa Rica | 05/19/1994 |
| Côte d'Ivoire | 06/24/1994 |
| Croatia | 03/04/1994 |
| Cuba | 04/04/1994 |
| Czechia | 06/30/1994 |
| D | |
| Denmark | 06/09/1994 |
| Djibouti | 05/24/1994 |
| Dominica | 06/08/1994 |
| Dominican Republic | 04/21/1994 |
| E | |
| Ecuador | 06/23/1994 |
| Egypt | 06/08/1994 |
| El Salvador | 05/20/1994 |
| Equatorial Guinea | 06/12/2003 |
| Eritrea | 12/27/1995 |
| Estonia | 05/12/1994 |
| Eswatini | 5/16/1994 |
| Ethiopia | 10/27/1994 |
| F | |
| Fiji | 05/10/1994 |
| Finland | 06/09/1994 |
| France | 06/20/1994 |
| G | |
| Gabon | 03/20/1998 |
| Gambia | 08/16/1994 |
| Georgia | 07/08/1994 |
| Germany | 06/23/1994 |
| Ghana | 01/16/1997 |
| Greece | 05/11/1994 |
| Grenada | 04/20/1994 |
| Guatemala | 05/20/1994 |
| Guinea | 10/17/1994 |
| Guinea-Bissau | 05/02/1995 |
| Guyana | 05/12/1994 |
| H | |
| Haiti | 05/10/1994 |
| Honduras | 09/06/1994 |
| Hungary | 06/22/1994 |
| I | |
| India | 05/12/1994 |
| Indonesia | 06/29/1994 |
| Iran, Islamic Republic of | 05/25/1994 |
| Iraq | 02/03/2010 |
| Ireland | 06/14/1994 |
| Israel | 03/19/1995 |
| Italy | 06/28/1994 |
| J | |
| Jamaica | 06/29/1994 |
| Japan | 06/27/1994 |
| Jordan | 05/10/1994 |
| K | |
| Kazakhstan | 03/30/1998 |
| Kenya | 05/25/1994 |
| Kiribati | 05/10/1994 |
| Korea, Dem. People's Republic of | 05/06/1994 |
| Korea, Republic of | 05/03/1994 |
| Kosovo | 03/11/2010 |
| Kuwait | 06/05/2010 |
| Kyrgyz Republic | 01/09/1997 |
| L | |
| Lao PDR | 08/02/1994 |
| Latvia | 06/27/1994 |
| Lebanon | 07/21/1994 |
| Lesotho | 06/29/1994 |
| Liberia | 12/05/2000 |
| Libya | 12/13/1994 |
| Lithuania | 05/13/1994 |
| Luxembourg | 04/28/1995 |
| M | |
| Madagascar | 07/14/1994 |
| Malawi | 02/23/1996 |
| Malaysia | 05/04/1994 |
| Maldives | 08/25/1994 |
| Mali | 07/04/1994 |
| Malta | 07/27/1994 |
| Marshall Islands | 04/15/1994 |
| Mauritania | 05/08/1994 |
| Mauritius | 07/04/1994 |
| Mexico | 05/17/1994 |
| Micronesia, Federated States of | 04/26/1994 |
| Moldova | 10/27/1995 |
| Mongolia | 04/14/1994 |
| Montenegro | 08/25/2006 |
| Morocco | 06/29/1994 |
| Mozambique | 12/27/1995 |
| Myanmar | 05/13/1994 |
| N | |
| Namibia | 04/30/2001 |
| Nauru | 05/05/1994 |
| Nepal | 08/10/1994 |
| Netherlands | 06/20/1994 |
| New Zealand | 05/18/1994 |
| Nicaragua | 05/19/1994 |
| Niger | 08/23/1994 |
| Nigeria | 07/12/1994 |
| Niue | 05/04/1994 |
| North Macedonia | 07/07/1994 |
| Norway | 07/01/1994 |
| P | |
| Pakistan | 04/08/1994 |
| Palau | 10/12/1998 |
| Palestine | 12/18/2015 |
| Panama | 04/07/1994 |
| Papua New Guinea | 05/06/1994 |
| Paraguay | 02/15/1995 |
| Peru | 06/14/1994 |
| Philippines | 06/16/1994 |
| Poland | 04/18/1994 |
| Portugal | 06/17/1994 |
| Q | |
| Qatar | 04/27/2022 |
| R | |
| Romania | 07/29/1994 |
| Russian Federation | 06/23/1994 |
| Rwanda | 06/11/2002 |
| S | |
| Saint Lucia | 03/31/1994 |
| Saint Vincent and the Grenadines | 05/04/1994 |
| Samoa | 03/28/1994 |
| Sao Tome and Principe | 06/07/2002 |
| Senegal | 04/07/1994 |
| Serbia | 09/16/2001 |
| Seychelles | 09/20/2001 |
| Sierra Leone | 09/06/1994 |
| Slovak Republic | 11/01/1994 |
| Slovenia | 07/12/1994 |
| Solomon Islands | 04/16/1994 |
| South Africa | 07/06/1994 |
| South Sudan | 04/25/2013 |
| Somalia | 04/11/2007 |
| Spain | 06/09/1994 |
| Sri Lanka | 05/26/1994 |
| St. Kitts and Nevis | 07/25/1994 |
| Sudan | 06/14/1994 |
| Suriname | 05/12/1994 |
| Sweden | 06/28/1994 |
| Switzerland | 07/01/1994 |
| Syria | 04/15/1996 |
| T | |
| Tajikistan | 10/01/1999 |
| Tanzania | 03/26/1996 |
| Thailand | 06/30/1994 |
| Timor-Leste (Democratic Republic of) | 10/06/2003 |
| Togo | 07/21/1994 |
| Tonga | 05/04/1994 |
| Trinidad and Tobago | 05/19/1994 |
| Tunisia | 05/13/1994 |
| Türkiye | 07/06/1994 |
| Turkmenistan | 05/29/1997 |
| Tuvalu | 05/03/1994 |
| U | |
| Uganda | 06/28/1994 |
| Ukraine | 06/15/1994 |
| United Kingdom | 06/13/1994 |
| United States | 06/24/1994 |
| Uruguay | 04/22/1994 |
| Uzbekistan | 04/05/1995 |
| V | |
| Vanuatu | 05/19/1994 |
| Venezuela, Republica Bolivariana de | 07/01/1994 |
| Vietnam | 05/12/1994 |
| Y | |
| Yemen | 03/30/1994 |
| Z | |
| Zambia | 06/13/1994 |
| Zimbabwe | 07/07/1994 |