ASEAN: membership history 1967–2026
ASEAN began in 1967 with 5 members. In 2026 it had 11 members. Membership changed in 6 years, including the 1967 founding.
Source: The groupings’ own member lists and histories, 10 Nov 20261967–2026
Brunei joined in 1984. Vietnam joined in 1995, Laos and Myanmar in 1997, and Cambodia in 1999. Timor-Leste joined in 2025.
Drafted with AI from cited sources and reviewed by the editor196719791991200220142026
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Membership, 2026
Joined that yearMemberLeft that yearFormer member
Not a member
Borders show who controls an area in practice, as drawn by Natural Earth. Disputed borders are dashed. Borders shown do not imply endorsement. How we treat borders
Timeline
| 1967 | Indonesia, Malaysia, Philippines, Singapore and Thailand | – | 5 | |
|---|---|---|---|---|
| 1984 | Brunei | – | 6 | |
| 1995 | Vietnam | – | 7 | |
| 1997 | Laos and Myanmar | – | 9 | |
| 1999 | Cambodia | – | 10 | |
| 2025 | Timor-Leste | – | 11 | Timor-Leste was admitted. |
Source: The groupings’ own member lists and histories, 10 Nov 20261967–2026
Every country that has been a member
| Indonesia | 1967 | 1967– |
|---|---|---|
| Malaysia | 1967 | 1967– |
| Philippines | 1967 | 1967– |
| Singapore | 1967 | 1967– |
| Thailand | 1967 | 1967– |
| Brunei | 1984 | 1984– |
| Vietnam | 1995 | 1995– |
| Laos | 1997 | 1997– |
| Myanmar | 1997 | 1997– |
| Cambodia | 1999 | 1999– |
| Timor-Leste | 2025 | 2025– |