Last Answer : ASEAN' currently has 10 members. ASEAN was formed on August 8, 1986 with 10 countries in Southeast Asia. The member countries of this organization are- 1. Indonesia , II. Malaysia , 3. Runai , 4. Thailand , 5. Vietnam , 6. Cambodia , 6. Philippines , 6. Laos , 9. Myanmar , 10 , Singapore.