List of regional organizations by population

The following is a list of regional organizations by population.

List

Entities	Founded	Population	Pct of world pop	Members	Notes
World		7,789,985,000	100.00%		Population Clock
Asia Cooperation Dialogue	2002	4,317,290,284	55.42%	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
Shanghai Cooperation Organisation	2001	3,247,750,955	41.69%	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
BRICS	2008	3,040,000,000	39.02%	Brazil Russia India China South Africa	An association of five major emerging national economies
Asia-Pacific Economic Cooperation	1989	2,700,000,000	34.66%	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, 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	31.05%	Antigua and Barbuda Australia Bahamas Bangladesh Barbados Belize Botswana Brunei Cameroon Canada Cyprus Dominica 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 Swaziland Tanzania 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
Regional Comprehensive Economic Partnership	2015	2,041,590,650	26.21%	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) to be concluded by the end of 2015
South Asian Association for Regional Cooperation	1985	1,713,870,000	22.00%	Afghanistan Bangladesh Bhutan India Maldives Nepal Pakistan Sri Lanka	Membership overlap with Economic Cooperation Organization, Commonwealth of Nations
SAPCZ	1986	1,552,860,934	19.93%	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
Organization for Security and Co-operation in Europe	1975	1,276,751,497	16.39%	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
African Union	2002	1,275,920,972	16.38%	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
Organization of American States	1948	980,457,921	12.59%	Antigua and Barbuda Argentina Bahamas Barbados Belize Bolivia Brazil Canada 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 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
NATO	1949	880,978,798	11.31%	Albania Belgium Bulgaria Canada Croatia Czech Republic Denmark Estonia France Germany Greece Hungary Iceland Italy Latvia Lithuania Luxembourg Montenegro Netherlands Norway Poland Portugal Romania Slovakia Slovenia Spain Turkey United Kingdom United States	Membership overlap with Commonwealth of Nations, European Union, Asia-Pacific Economic Cooperation, North American Free Trade Agreement, Organization of American States)
Council of Europe	1949	820,000,000	10.53%	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 Russia San Marino Serbia Slovakia Slovenia Spain Sweden Switzerland Turkey Ukraine United Kingdom	Membership overlap with
Inter-American Treaty of Reciprocal Assistance	1948	754,901,942	9.69%	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
Community of Latin American and Caribbean States	2010	652,012,001	8.37%	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
ASEAN	1967	647,016,000	8.31%	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
Latin American Integration Association	1980	515,722,726	6.62%	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	6.61%	Austria Belgium Bulgaria Croatia Cyprus Czech Republic Denmark EU 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 and La Francophonie
European Union	1957	513,481,691	6.59%	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^[1]
North American Free Trade Agreement	1994	490,000,000	6.29%	Canada Mexico United States	Membership overlap with Commonwealth of Nations, NATO, Asia-Pacific Economic Cooperation, CAFTA-DR, Organization of American States
Economic Cooperation Organization	1985	488,405,949	6.27%	Afghanistan Azerbaijan Iran Kazakhstan Kyrgyzstan Pakistan Tajikistan Turkey Turkmenistan Uzbekistan	Membership overlap with South Asian Association for Regional Cooperation
Arab League	1945	423,000,000	5.43%	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, La Francophonie
OPEC	1960	369,814,472	4.75%	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
Organization of the Black Sea Economic Cooperation	1992	330,000,000^[2]	4.24%	Albania Armenia Azerbaijan Bulgaria Georgia Greece Moldova Romania Russia Serbia Turkey Ukraine	Membership overlap with
Council of the Baltic Sea States	1992	300,744,708	3.86%	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	3.57%	Azerbaijan Belarus Kazakhstan Kyrgyzstan Armenia Moldova Russia Tajikistan Uzbekistan	Membership overlap with Asia-Pacific Economic Cooperation
Mercosur/Mercosul	1991	265,212,435	3.40%	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	3.04%	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, 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	2.81%	Chile Colombia Mexico Peru	Membership overlap with Organization of American States
Collective Security Treaty Organisation	1994	210,000,000	2.70%	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	2.64%	Armenia Belarus Kazakhstan Kyrgyzstan Russia	Membership overlap with Commonwealth of Independent States and Shanghai Cooperation Organisation, Asia-Pacific Economic Cooperation
South-East European Cooperation Process	1996	150,492,458	1.93%	Albania Bosnia and Herzegovina Bulgaria Croatia Greece Kosovo Moldova Montenegro North Macedonia Romania Serbia Slovenia Turkey	Membership overlap with EU and Council of Europe.
British-Irish Council	1999	73,072,783	0.94%	Guernsey Ireland Isle of Man Jersey United Kingdom	Membership overlap with EU. The devolved institutions of Northern Ireland, Scotland and Wales are representated separately.
Visegrád Group	1991	64,320,833	0.83%	Czech Republic Hungary Poland Slovakia	Membership overlap with EU
GUAM Organization for Democracy and Economic Development	1999	62,140,327	0.80%	Azerbaijan Georgia Moldova Ukraine ^[3]	Membership overlap with EU
Central American Integration System	1993	51,152,936	0.66%	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
Union of South American Nations	2005	49,002,000	0.63%	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
Pacific Islands Forum	1971	40,054,000	0.51%	Australia Cook Islands Fiji French Polynesia Kiribati Marshall Islands F.S. Micronesia Nauru New Caledonia New Zealand Niue Palau Papua New Guinea Samoa Solomon Islands Tonga Tuvalu Vanuatu	Membership overlaps with APEC
Benelux	1948	29,300,000	0.38%	Belgium Luxembourg Netherlands	Membership overlap with EU
Nordic Council	1953	25,880,000	0.34%	Denmark Finland Iceland Norway Sweden	Membership overlap with EU
Central European Free Trade Agreement	1992	21,907,354	0.28%	Albania Bosnia and Herzegovina Kosovo (through UNMIK) Moldova Montenegro North Macedonia Serbia	Membership overlap with
CARICOM	1973	18,095,201	0.23%	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, 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	0.18%	Iceland Liechtenstein Norway Switzerland	Membership overlap with EEA.\|
Organisation of Eastern Caribbean States	1981	615,724	0.01%	Antigua and Barbuda Dominica Grenada Montserrat Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines	Membership overlap with CARICOM.