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ASEAN: Association of Southeast Asian Nations

Ten founding members. Now eleven. ASEAN is the region’s oldest and most important regional bloc, and it keeps growing.

India’s own foreign policy leans heavily on its ties with Southeast Asia. Knowing ASEAN’s members, history, and structure is a recurring exam theme.

Map showing the eleven member states of ASEAN across Southeast Asia
Map of ASEAN’s member states, coloured by year of accession, including Timor-Leste’s 2025 addition. Hariboneagle927/Cmglee, Public Domain, via Wikimedia Commons.
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ASEAN’s total membership after Timor-Leste joined on 26 October 2025, its first expansion since 1999.
Founded
8 August 1967
Bangkok Declaration, signed by 5 founding members
Headquarters
Jakarta
Home to the ASEAN Secretariat
Newest Member
Timor-Leste
Joined 26 October 2025, the 11th member
India Link
Act East Policy
India’s strategic framework for ASEAN engagement
The exam angle: exams frequently test the founding members, the year of a member’s accession, and the most recent addition. Timor-Leste’s 2025 entry is now a high-yield fact.

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📑 Contents
🏛️ Must Know
Founding and Members
  • Full Name ASEAN stands for the Association of Southeast Asian Nations.NCERT 12
  • Founded ASEAN was founded on 8 August 1967 in Bangkok, through the Bangkok Declaration.NCERT 12
  • Founding Members The five founding members were Indonesia, Malaysia, the Philippines, Singapore, and Thailand.NCERT 12
  • Later Members Brunei joined in 1984, Vietnam in 1995, Laos and Myanmar in 1997, and Cambodia in 1999.NCERT 12
  • Newest Member Timor-Leste became ASEAN's 11th member on 26 October 2025, at the 47th ASEAN Summit in Kuala Lumpur.NCERT 12
📘 Good to Know
Structure and India's Ties
  • Headquarters The ASEAN Secretariat is based in Jakarta, Indonesia.NCERT 12
  • Original Goals ASEAN was formed to promote economic, social, and cultural cooperation, and to foster regional peace and stability.NCERT 12
  • The ASEAN Way ASEAN decisions are traditionally made through consensus and non-interference in members' internal affairs, an approach often called "the ASEAN Way."NCERT 12
  • India's Act East Policy India's Act East Policy, launched in 2014, builds on deeper economic and strategic engagement with ASEAN and the wider Indo-Pacific.NCERT 12
  • India-ASEAN Summit India holds an annual India-ASEAN Summit, alongside separate strategic and defence dialogues with the bloc.NCERT 12

Test Yourself

1. In which year was ASEAN founded, through the signing of the Bangkok Declaration?

 

🌟 Great to Know
Timor-Leste's Accession
  • First Expansion Since 1999 Timor-Leste's admission marked ASEAN's first expansion in over two decades, growing the bloc from ten members to eleven.NCERT 12
  • Long Road Timor-Leste first applied for ASEAN membership in 2011. It was granted observer status years later, before finally being admitted in 2025.NCERT 12
  • Roadmap to Membership In 2022, ASEAN leaders agreed in principle to admit Timor-Leste, and adopted a formal roadmap for its full membership in 2023.NCERT 12
  • Not to Confuse Vietnam, Brunei, and Cambodia are all long-standing ASEAN members, not new entrants. Timor-Leste alone is the 2025 addition.NCERT 12
📝 Exam Point of View
NDA & NA (I) 2026 GAT — ASEAN's Newest Member
  • Question NDA & NA (I) 2026, General Ability Test, Q146: which country became the 11th member of ASEAN in 2025? The correct answer is Timor-Leste.
    Why Timor-Leste joined ASEAN on 26 October 2025 at the 47th ASEAN Summit, the bloc's first expansion since Cambodia joined in 1999. Vietnam, Brunei, and Cambodia are all long-standing members, not new entrants.
    Link See the full question, NDA & NA (I) 2026 GAT, Q146.NCERT 12

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