| Entities | Date formed | Population | %[1] | Notes |
| World | | 7,302,446,600 | 100% | Population clock |
| Asia-Pacific Economic Cooperation | 1989 | 2,700,000,000 | 40.95% | 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 | 1,921,974,000 | 29.15% | Membership overlap with European Union, European Economic Area, African, Caribbean and Pacific Group of States, African Union, Arab League, 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 |
| Shanghai Cooperation Organisation | 2001 | 1,519,750,955 | 23.05% | Membership overlap with CIS and Eurasian Economic Community, Asia-Pacific Economic Cooperation |
| South Asian Association for Regional Cooperation | 1985 | 1,467,255,669 | 22.25% | Membership overlap with Economic Cooperation Organization, Commonwealth of Nations |
| Organization of American States | 1908 | 910,720,588 | 13.81% | 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 | 13.36% | Membership overlap with Commonwealth of Nations, European Union, Asia-Pacific Economic Cooperation, North American Free Trade Agreement, Organization of American States) |
| African Union | 2002 | 850,000,000 | 12.89% | Membership overlap with Arab League, African, Caribbean and Pacific Group of States, Commonwealth of Nations, La Francophonie, Latin Union |
| Association of Southeast Asian Nations | 1967 | 558,812,200 | 8.47% | Membership overlap with Asia-Pacific Economic Cooperation, African, Caribbean and Pacific Group of States, Small Islands Developing States |
| European Union | 1957 | 500,900,000 | 7.6% | Membership overlap with NATO, Commonwealth of Nations, European Economic Area Eurostat data [2] |
| European Economic Area | 1994 | 500,017,119 | 7.58% | Membership overlap with European Union, European Free Trade Association, Commonwealth of Nations and La Francophonie |
| North American Free Trade Agreement | 1994 | 457,284,932 | 6.93% | Membership overlap with Mercosur/Mercosul, Commonwealth of Nations, NATO, Asia-Pacific Economic Cooperation, CAFTA-DR, Organization of American States |
| Economic Cooperation Organization | 1985 | 405,139,000 | 6.14% | Membership overlap with South Asian Association for Regional Cooperation |
| Union of South American Nations | 2005 | 379,782,748 | 5.76% | Membership overlap with Mercosur/Mercosul, Asia-Pacific Economic Cooperation, Latin Union, Community of Latin American and Caribbean States, RIO Group, Association of Caribbean States |
| OPEC | 1960 | 369,814,472 | 5.61% | 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 |
| Arab League | 1945 | 339,510,535 | 5.15% | Membership overlap with African Union, La Francophonie |
| Commonwealth of Independent States | 1991 | 277,983,490 | 4.22% | Membership overlap with Asia-Pacific Economic Cooperation |
| Mercosur/Mercosul | 1991 | 265,212,435 | 4.02% | 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 |
| Collective Security Treaty Organisation | 1994 | 210,000,000 | 3.18% | Membership overlap with Commonwealth of Independent States, Shanghai Cooperation Organisation, Asia-Pacific Economic Cooperation |
| Eurasian Economic Community | 2001 | 205,693,649 | 3.12% | Membership overlap with Commonwealth of Independent States and Shanghai Cooperation Organisation, Asia-Pacific Economic Cooperation |
| Central American Integration System | 1993 | 51,152,936 | 0.78% | 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 |
| Association of Caribbean States | 1994 | 237,000,000 | 0% | 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 |
| Caribbean Community | 1973 | 16,743,693 | 0% | 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 |
|
