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Organization of American States Member Countries – Full List & Details

The Organization of American States Member Countries page provides a complete overview of the nations that form the OAS. Established in 1948, the Organization of American States promotes regional solidarity, democratic governance, human rights, and economic cooperation across the Americas. The OAS serves as a platform for dialogue among countries in North America, Central America, South America, and the Caribbean. This guide explains which countries are members, how OAS membership works, and why the organization remains important in hemispheric cooperation.

What is the Organization of American States (OAS)?

The Organization of American States, commonly known as the OAS, is a regional organization that promotes cooperation among countries in the Americas.

The OAS focuses on:

  • Democratic governance
  • Human rights protection
  • Regional security
  • Economic development
  • Electoral observation missions
  • Conflict resolution

The OAS headquarters is located in Washington, D.C., United States.

How Many Members Are in the OAS?

The Organization of American States has 35 member states, representing all independent countries of the Americas.

Membership is open to sovereign states in the Western Hemisphere that accept the principles of the OAS Charter.

Complete List of OAS Member Countries

Below is the full list of OAS member countries:

  1. Antigua and Barbuda
  2. Argentina
  3. Bahamas
  4. Barbados
  5. Belize
  6. Bolivia
  7. Brazil
  8. Canada
  9. Chile
  10. Colombia
  11. Costa Rica
  12. Cuba
  13. Dominica
  14. Dominican Republic
  15. Ecuador
  16. El Salvador
  17. Grenada
  18. Guatemala
  19. Guyana
  20. Haiti
  21. Honduras
  22. Jamaica
  23. Mexico
  24. Nicaragua
  25. Panama
  26. Paraguay
  27. Peru
  28. Saint Kitts and Nevis
  29. Saint Lucia
  30. Saint Vincent and the Grenadines
  31. Suriname
  32. Trinidad and Tobago
  33. United States
  34. Uruguay
  35. Venezuela

Each member country maintains sovereignty while participating in collective hemispheric initiatives.

You can explore each national flag in our Countries of the Americas Flags section for more details.

Historical Background of OAS Membership

The OAS was officially founded on 30 April 1948 with the signing of the OAS Charter in Bogotá, Colombia.

The organization evolved from earlier Pan-American conferences and was designed to promote unity across the Americas.

Over time, membership expanded to include all independent nations in the Western Hemisphere.

Why OAS Membership Matters

Membership in the OAS provides several benefits:

Democratic Support

The OAS monitors elections and promotes democratic institutions.

Human Rights Protection

The Inter-American Commission on Human Rights operates within the OAS system.

Regional Security

Members cooperate on security challenges and crisis prevention.

Economic Development

Programs support development and technical cooperation.

Diplomatic Dialogue

The OAS serves as a forum for addressing regional disputes peacefully.

Governance Structure of the OAS

The OAS operates through:

  • General Assembly
  • Permanent Council
  • Inter-American Commission on Human Rights
  • General Secretariat
  • Specialized agencies

Decisions are generally made through consultation and voting procedures.

Role of the OAS Flag

The Flag of Organization of American States symbolizes unity among nations of the Americas.

It features the flags of member states arranged within a circular design, representing hemispheric cooperation.

The flag is displayed at:

  • OAS headquarters
  • Diplomatic conferences
  • Election observation missions
  • Regional summits

Relationship with National Sovereignty

OAS membership does not override national independence.

Each country:

  • Maintains its own constitution
  • Controls domestic governance
  • Preserves national identity and symbols

The organization promotes cooperation rather than political integration.

Regional Influence of OAS Members

Together, OAS member countries represent:

  • All independent states in the Americas
  • Major global economies
  • Diverse political systems
  • Strong regional trade networks

The organization remains central to hemispheric dialogue.

Interesting Facts About OAS Members

  • Founded in 1948
  • Includes 35 member states
  • Headquarters in Washington, D.C.
  • Promotes democracy and human rights
  • Covers North, Central, and South America

Questions About Organization of American States Member Countries

How many countries are members of the OAS?

There are 35 member states.

When was the OAS established?

It was founded in 1948.

What is the purpose of the OAS?

To promote democracy, human rights, and regional cooperation.

Does OAS membership replace national governments?

No, countries remain sovereign.

Where is the OAS headquarters located?

It is located in Washington, D.C., United States.

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