Supranational Organizations

Realms and Commonwealths

• Castilian Commonwealth of Nations
• Commonwealth of Nations
• Commonwealth of the Scandinavian Realm

Free markets and trading unions

• Andean Pact
• Chinese League
• CMAEC
• Lusoamerican Union
• OASSA

Military pacts

• Riga Pact

Cultural Organizations

• Aragonese League
• CELCAGOM (defunct)
• Silk Road League
• South Asian Nations

Other organizations

• Arab Community
• ATOE Transoceanic Alliance for the Exploration of Space
• Austronesian League
• Baltic League
• CICEP
• Community of Dalmatophone States
• East_Asian_Federation or TAR
• Hanseatic League
• Himalayan Confederacy
• League of Nations
  • Commission on Very Small States
  • International Postal Congress
• League of Noble Emigrees
• Mazandaran Ecotopic Association
• Organisation of American States
• Régiment de la Paix
• SpaceOrg
• Teutonic Order
• League of Ice