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ASEAN has 11 members. Timor-Leste became the 11th on 26 October 2025, the first new member since Cambodia in 1999.
Every country in Southeast Asia is now in. The five founders spell MIST-P: Malaysia, Indonesia, Singapore, Thailand, the Philippines.
Signed the Bangkok Declaration establishing ASEAN.
Brunei in 1984, Vietnam in 1995, Laos and Myanmar in 1997, Cambodia in 1999.
First expansion in 26 years; admitted 2025 after over a decade as an observer/applicant.
Can you name them all?
Test yourselfASEAN has 11 members. Timor-Leste became the 11th on 26 October 2025, the first new member since Cambodia in 1999.
Indonesia, Malaysia, Philippines, Singapore, Thailand, Brunei, Vietnam, Laos, Myanmar, Cambodia and Timor-Leste.
Every country in Southeast Asia is now in. The five founders spell MIST-P: Malaysia, Indonesia, Singapore, Thailand, the Philippines.
No. Papua New Guinea has special observer status, not membership.
Each name checked against at least two sources, one of them ASEAN Main Portal, on 28 September 2026. Next review by 28 September 2027.
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