# List of regional organizations by population

The following is a list of regional organizations by population.

## List

| Organization | Founded | Population | % of world | Members | Notes |
| World | | 8,134,955,000 | 100% | | Population Clock |
| Asia Cooperation Dialogue | 2002 | 4,736,401,222 | 58% | Afghanistan Bahrain Bangladesh Bhutan Brunei Cambodia China India Indonesia Iran Japan Kazakhstan South Korea Kuwait Kyrgyzstan Laos Malaysia Mongolia Myanmar Nepal Oman Pakistan Philippines Qatar Russia Saudi Arabia Singapore Sri Lanka Tajikistan Thailand Turkey United Arab Emirates Uzbekistan Vietnam | Membership overlap with ASEAN, SAARC, Commonwealth of Nations, CIS |
| Shanghai Cooperation Organisation | 2001 | 3,346,912,391 | 41% | China India Kazakhstan Kyrgyzstan Pakistan Russia Tajikistan Uzbekistan | Membership overlap with CIS and Eurasian Economic Community, Asia-Pacific Economic Cooperation, South Asian Association for Regional Cooperation, Commonwealth of Nations |
| BRICS | 2008 | 3,040,000,000 | 37% | Brazil Russia India China South Africa | An association of five major emerging national economies. Membership overlap with Commonwealth of Nations and CIS. |
| Asia-Pacific Economic Cooperation | 1989 | 2,700,000,000 | 33% | Australia Brunei Canada Chile China Hong Kong Indonesia Japan South Korea Malaysia Mexico New Zealand Papua New Guinea Peru Philippines Russia Singapore Taiwan Thailand United States Vietnam | Membership overlap with Association of Southeast Asian Nations, Commonwealth of Nations, Eurasian Economic Community, North American Free Trade Agreement, NATO, OPEC, Organisation internationale de la Francophonie, Shanghai Cooperation Organisation, Mercosur/Mercosul, Union of South American Nations, African, Caribbean and Pacific Group of States, |
| Commonwealth of Nations | 1931 | 2,418,964,000 | 30% | Antigua and Barbuda Australia Bahamas Bangladesh Barbados Belize Botswana Brunei Cameroon Canada Cyprus Dominica Eswatini Fiji Gabon Gambia Ghana Grenada Guyana India Jamaica Kenya Kiribati Lesotho Malawi Malaysia Maldives Malta Mauritius Mozambique Namibia Nauru New Zealand Nigeria Pakistan Papua New Guinea Rwanda Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Samoa Seychelles Sierra Leone Singapore Solomon Islands South Africa Sri Lanka Tanzania Togo Tonga Trinidad and Tobago Tuvalu Uganda United Kingdom Vanuatu Zambia | Membership overlap with European Union, European Economic Area, African, Caribbean and Pacific Group of States, African Union, South Asian Association for Regional Cooperation, Union of South American Nations, Caribbean Community, CARIFORUM, NATO, and Association of Southeast Asian Nations, Asia-Pacific Economic Cooperation, Small Island Developing States, Organisation internationale de la Francophonie |
| Regional Comprehensive Economic Partnership | 2020 | 2,041,590,650 | 25% | Australia Brunei Cambodia China Indonesia Japan South Korea Laos Malaysia Myanmar New Zealand Philippines Singapore Thailand Vietnam | A Free Trade Agreement (FTA) scheme of the 10 ASEAN Member States and its FTA Partners (Australia, China, Japan, Korea and New Zealand). |
| South Asian Association for Regional Cooperation | 1985 | 1,713,870,000 | 21% | Afghanistan Bangladesh Bhutan India Maldives Nepal Pakistan Sri Lanka | Membership overlap with Economic Cooperation Organization, Commonwealth of Nations. |
| South Atlantic Peace and Cooperation Zone | 1986 | 1,552,860,934 | 19% | Argentina Angola Benin Brazil Cape Verde Cameroon Congo DR Congo Equatorial Guinea Gabon Gambia Ghana Guinea Guinea-Bissau Ivory Coast Liberia Namibia Nigeria São Tomé and Príncipe Senegal Sierra Leone South Africa Togo Uruguay | Membership overlap with Commonwealth of Nations, Organisation internationale de la Francophonie |
| Organization for Security and Co-operation in Europe | 1975 | 1,276,751,497 | 16% | Albania Andorra Armenia Austria Azerbaijan Belarus Belgium Bosnia and Herzegovina Bulgaria Canada Croatia Cyprus Czech Republic Denmark Estonia Finland France Georgia Germany Greece Hungary Iceland Ireland Italy Kazakhstan Kyrgyzstan Latvia Liechtenstein Lithuania Luxembourg Malta Moldova Monaco Mongolia Montenegro Netherlands North Macedonia Norway Poland Portugal Romania Russia San Marino Serbia Slovakia Slovenia Spain Sweden Switzerland Tajikistan Turkey Turkmenistan Ukraine United Kingdom United States Uzbekistan Vatican City | Membership overlap with EU, NATO, Commonwealth of Nations, Organisation Internationale de la Francophonie |
| African Union | 2002 | 1,275,920,972 | 16% | Algeria Angola Benin Botswana Burkina Faso Burundi Cape Verde Cameroon Central African Republic Chad Comoros DR Congo Djibouti Egypt Equatorial Guinea Eritrea Eswatini Ethiopia Gabon Gambia Ghana Guinea Guinea-Bissau Ivory Coast Kenya Lesotho Liberia Libya Madagascar Malawi Mali Mauritania Mauritius Morocco Mozambique Namibia Niger Nigeria Congo Rwanda Sahrawi Arab Democratic Republic São Tomé and Príncipe Senegal Seychelles Sierra Leone Somalia South Africa South Sudan Sudan Tanzania Togo Tunisia Uganda Zambia Zimbabwe | Membership overlap with Commonwealth of Nations, Organisation internationale de la Francophonie |
| Organisation internationale de la Francophonie | 1970 | 1,000,000,000 | 12% | Albania Andorra Armenia Belgium ( French Community of Belgium) Benin Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada ( New Brunswick) ( Quebec) Cape Verde Central African Republic Chad Comoros Congo DR Congo Djibouti Dominica Equatorial Guinea Egypt France Gabon Greece Guinea Guinea-Bissau Haiti Ivory Coast Laos Lebanon Luxembourg Madagascar Mali Mauritania Mauritius Moldova Monaco Morocco North Macedonia Niger Romania Rwanda Saint Lucia São Tomé and Príncipe Senegal Seychelles Switzerland Togo Tunisia Vanuatu Vietnam | Membership overlap with North Atlantic Treaty Organization, European Economic Area, North American Free Trade Agreement, Arab League, Association of Caribbean States, Caribbean Community, Commonwealth of Nations |
| Organization of American States | 1948 | 980,457,921 | 12% | Antigua and Barbuda Argentina Bahamas Barbados Belize Bolivia Brazil Canada Chile Colombia Costa Rica Dominica Dominican Republic Ecuador El Salvador Grenada Guatemala Guyana Haiti Honduras Jamaica Mexico Nicaragua Panama Paraguay Peru Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Suriname Trinidad and Tobago United States Uruguay Venezuela | Membership overlap with NATO, North American Free Trade Agreement, Mercosur/Mercosul, Asia-Pacific Economic Cooperation, Union of South American States, CAFTA-DR, Community of Latin American and Caribbean States, RIO Group, Caribbean Community, Association of Caribbean States, Commonwealth of Nations, Organisation internationale de la Francophonie |
| North Atlantic Treaty Organization | 1949 | 880,978,798 | 11% | Albania Belgium Bulgaria Canada Croatia Czech Republic Denmark Estonia Finland France Germany Greece Hungary Iceland Italy Latvia Lithuania Luxembourg Montenegro Netherlands North Macedonia Norway Poland Portugal Romania Slovakia Slovenia Spain Sweden Turkey United Kingdom United States | Membership overlap with Commonwealth of Nations, European Union, Organisation internationale de la Francophonie, Asia-Pacific Economic Cooperation, North American Free Trade Agreement, Organization of American States) |
| Council of Europe | 1949 | 820,000,000 | 10% | Albania Andorra Armenia Austria Azerbaijan Belgium Bosnia and Herzegovina Bulgaria Croatia Cyprus Czech Republic Denmark Estonia Finland France Georgia Germany Greece Hungary Iceland Ireland Italy Latvia Liechtenstein Lithuania Luxembourg Malta Moldova Monaco Montenegro Netherlands North Macedonia Norway Poland Portugal Romania San Marino Serbia Slovakia Slovenia Spain Sweden Switzerland Turkey Ukraine United Kingdom | Membership overlap with Commonwealth of Nations, Organisation internationale de la Francophonie |
| Inter-American Treaty of Reciprocal Assistance | 1948 | 754,901,942 | 9.3% | Argentina Bahamas Brazil Chile Colombia Costa Rica Dominican Republic El Salvador Guatemala Haiti Honduras Panama Paraguay Peru Trinidad and Tobago United States Venezuela | Membership overlap with Organization of American States, Commonwealth of Nations, Organisation internationale de la Francophonie |
| Community of Latin American and Caribbean States | 2010 | 652,012,001 | 8.0% | Antigua and Barbuda Argentina Bahamas Barbados Belize Bolivia Chile Colombia Costa Rica Cuba Dominica Dominican Republic Ecuador El Salvador Grenada Guatemala Guyana Haiti Honduras Jamaica Mexico Nicaragua Panama Paraguay Peru Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Suriname Trinidad and Tobago Uruguay Venezuela | Membership overlap with Organization of American States, Commonwealth of Nations, Organisation internationale de la Francophonie |
| Association of Southeast Asian Nations | 1967 | 647,016,000 | 8.0% | Brunei Cambodia Indonesia Laos Malaysia Myanmar Philippines Singapore Thailand Vietnam | Membership overlap with Asia-Pacific Economic Cooperation, African, Caribbean and Pacific Group of States, Small Islands Developing States, Commonwealth of Nations, Organisation internationale de la Francophonie |
| Latin American Integration Association | 1980 | 515,722,726 | 6.3% | Argentina Bolivia Brazil Chile Colombia Cuba Ecuador Mexico Paraguay Panama Peru Uruguay Venezuela | Membership overlap with Organization of American States |
| European Economic Area | 1994 | 515,000,000 | 6.3% | Austria Belgium Bulgaria Croatia Cyprus Czech Republic Denmark European Union Estonia Finland France Germany Greece Hungary Iceland Ireland Italy Latvia Liechtenstein Lithuania Luxembourg Malta Netherlands Norway Poland Portugal Romania Slovakia Slovenia Spain Sweden Switzerland | Membership overlap with European Union, European Free Trade Association, Commonwealth of Nations, Organisation internationale de la Francophonie |
| United States–Mexico–Canada Agreement | 1994 | 490,000,000 | 6.0% | Canada Mexico United States | Membership overlap with Commonwealth of Nations, NATO, Organisation internationale de la Francophonie, Asia-Pacific Economic Cooperation, CAFTA-DR, Organization of American States |
| Economic Cooperation Organization | 1985 | 488,405,949 | 6.0% | Afghanistan Azerbaijan Iran Kazakhstan Kyrgyzstan Pakistan Tajikistan Turkey Turkmenistan Uzbekistan | Membership overlap with South Asian Association for Regional Cooperation, Commonwealth of Nations |
| European Union | 1957 | 447,700,000 | 5.5% | Austria Belgium Bulgaria Croatia Cyprus Czech Republic Denmark Estonia Finland France Germany Greece Hungary Ireland Italy Latvia Lithuania Luxembourg Malta Netherlands Poland Portugal Romania Slovakia Slovenia Spain Sweden | Membership overlap with NATO, Commonwealth of Nations, European Economic Area, Organisation internationale de la Francophonie |
| Arab League | 1945 | 423,000,000 | 5.2% | Algeria Bahrain Comoros Djibouti Egypt Iraq Jordan Kuwait Lebanon Libya Mauritania Morocco Oman Palestine Qatar Saudi Arabia Somalia Sudan Syria Tunisia United Arab Emirates Yemen | Membership overlap with African Union, Organisation internationale de la Francophonie |
| Forum for the Progress and Development of South America | 2019 | 391,130,443 | 4.8% | Argentina Brazil Chile Colombia Ecuador Guyana Paraguay Peru | Membership overlap with Commonwealth of Nations |
| OPEC | 1960 | 369,814,472 | 4.5% | Algeria Angola Congo Equatorial Guinea Gabon Iran Iraq Kuwait Libya Nigeria Saudi Arabia United Arab Emirates Venezuela | Membership overlap with Shanghai Cooperation Organisation, South Asian Association for Regional Cooperation, Organization of American States, African Union, Economic Cooperation Organization, Union of South American Nations, Arab League, Mercosur or Mercosul, Commonwealth of Nations, Organisation internationale de la Francophonie |
| Organization of the Black Sea Economic Cooperation | 1992 | 330,000,000 | 4.1% | Albania Armenia Azerbaijan Bulgaria Georgia Greece Moldova Romania Russia Serbia Turkey Ukraine | Membership overlap with CIS, Organisation internationale de la Francophonie |
| Council of the Baltic Sea States | 1992 | 300,744,708 | 3.7% | Denmark Estonia Finland Germany Iceland Latvia Lithuania Norway Poland Russia Sweden | Membership overlap with EU, CIS, Nordic Council, OBSEC. |
| Commonwealth of Independent States | 1991 | 277,983,490 | 3.4% | Azerbaijan Belarus Kazakhstan Kyrgyzstan Armenia Moldova Russia Tajikistan Uzbekistan | Membership overlap with Asia-Pacific Economic Cooperation |
| Mercosur/Mercosul | 1991 | 265,212,435 | 3.3% | Argentina Brazil Paraguay Uruguay | Membership overlap with Union of South American Nations, Asia-Pacific Economic Cooperation, Unions of South American Nations, Latin Union, Community of Latin American and Caribbean States, RIO Group, Organization of American States |
| Association of Caribbean States | 1994 | 237,000,000 | 2.9% | Antigua and Barbuda Bahamas Barbados Belize Colombia Costa Rica Cuba Dominica Dominican Republic El Salvador Grenada Guatemala Guyana Haiti Honduras Jamaica Mexico Nicaragua Panama Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Suriname Trinidad and Tobago Venezuela | An economic zone of Central American plus Caribbean states along with northern South America. Membership overlap with Latin Union, Commonwealth of Nations, Organisation internationale de la Francophonie, Community of Latin American and Caribbean States, Union of South American Nations, Caribbean Community, CARIFORUM, RIO Group, CAFTA-DR, Organization of American States |
| Pacific Alliance | 2012 | 218,536,683 | 2.7% | Chile Colombia Mexico Peru | Membership overlap with Organization of American States |
| Collective Security Treaty Organisation | 1994 | 210,000,000 | 2.6% | Armenia Belarus Kazakhstan Kyrgyzstan Russia Tajikistan | Membership overlap with Commonwealth of Independent States, Shanghai Cooperation Organisation, Asia-Pacific Economic Cooperation |
| Eurasian Economic Union | 2001 | 205,693,649 | 2.5% | Armenia Belarus Kazakhstan Kyrgyzstan Russia | Membership overlap with Commonwealth of Independent States and Shanghai Cooperation Organisation, Asia-Pacific Economic Cooperation |
| Organization of Turkic States | 2009 | 151,041,079 | 1.9% | Azerbaijan Kazakhstan Kyrgyzstan Turkey Uzbekistan | Membership overlap with Economic Cooperation Organization |
| South-East European Cooperation Process | 1996 | 150,492,458 | 1.8% | Albania Bosnia and Herzegovina Bulgaria Croatia Greece Kosovo Moldova Montenegro North Macedonia Romania Serbia Slovenia Turkey | Membership overlap with EU, Council of Europe and Organisation internationale de la Francophonie. |
| British-Irish Council | 1999 | 73,072,783 | 0.90% | Guernsey Ireland Isle of Man Jersey United Kingdom | Membership overlap with EU and Commonwealth of Nations. The devolved institutions of Northern Ireland, Scotland and Wales are represented separately. |
| Visegrád Group | 1991 | 65,162,145 | 0.80% | Czech Republic Hungary Poland Slovakia | Membership overlap with EU |
| GUAM Organization for Democracy and Economic Development | 1999 | 62,140,327 | 0.76% | Azerbaijan Georgia Moldova Ukraine | Membership overlap with EU |
| Central American Integration System | 1993 | 51,152,936 | 0.63% | Belize Costa Rica Dominican Republic El Salvador Guatemala Honduras Nicaragua Panama | An economic and political organization of eight Central American states Membership overlap with Latin Union, Community of Latin American and Caribbean States, Union of South American Nations, Association of Caribbean States, RIO Group, CAFTA-DR, Organization of American States, Commonwealth of Nations |
| Union of South American Nations | 2005 | 49,002,000 | 0.60% | Bolivia Guyana Suriname Uruguay Venezuela | Membership overlap with Mercosur/Mercosul, Asia-Pacific Economic Cooperation, Latin Union, Community of Latin American and Caribbean States, RIO Group, Association of Caribbean States, Commonwealth of Nations |
| Pacific Islands Forum | 1971 | 40,054,000 | 0.49% | Australia Cook Islands Fiji French Polynesia Kiribati Marshall Islands Micronesia Nauru New Caledonia New Zealand Niue Palau Papua New Guinea Samoa Solomon Islands Tonga Tuvalu Vanuatu | Membership overlaps with APEC, Commonwealth of Nations |
| Benelux | 1948 | 29,300,000 | 0.36% | Belgium Luxembourg Netherlands | Membership overlap with EU, Organisation internationale de la Francophonie |
| Nordic Council | 1953 | 25,880,000 | 0.32% | Denmark Finland Iceland Norway Sweden | Membership overlap with EU |
| Central European Free Trade Agreement | 1992 | 21,907,354 | 0.27% | Albania Bosnia and Herzegovina Kosovo (through UNMIK) Moldova Montenegro North Macedonia Serbia | Membership overlap with Organisation internationale de la Francophonie |
| Caribbean Community | 1973 | 18,095,201 | 0.22% | Antigua and Barbuda Bahamas Barbados Belize Dominica Grenada Guyana Haiti Jamaica Montserrat Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Suriname Trinidad and Tobago | An economic organization made up of fifteen full members, (fourteen independent countries + one British overseas territory.) Membership overlap with Commonwealth of Nations, Organisation internationale de la Francophonie, Small Islands Developing States, CARIFORUM, Community of Latin American and Caribbean States, Union of South American Nations, Association of Caribbean States, Organization of Eastern Caribbean States, RIO Group, Central American Integration System, Organization of American States |
| European Free Trade Association | 1960 | 14,050,000 | 0.17% | Iceland Liechtenstein Norway Switzerland | Membership overlap with EEA, Organisation internationale de la Francophonie. |
| Organisation of Eastern Caribbean States | 1981 | 608,872 | 0.0075% | Antigua and Barbuda Dominica Grenada Montserrat Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines | Membership overlap with CARICOM, Commonwealth of Nations and Organisation internationale de la Francophonie. |