The Association of Southeast Asian Nations, or ASEAN, was established on 8 August 1967 in Bangkok, Thailand, with the signing of the ASEAN Declaration (Bangkok Declaration) by the Founding Fathers of ASEAN, namely Indonesia, Malaysia, Philippines, Singapore and Thailand.

The ASEAN Secretariat was set up in February 1976 by the Foreign Ministers of ASEAN. It was then housed at the Department of Foreign Affairs of Indonesia in Jakarta. The existing ASEAN Secretariat at 70A Jalan Sisingamangaraja, Jakarta was established and officiated in 1981 by the then President of Indonesia, H.E. Soeharto.

The ASEAN Secretariat’s basic function is to provide for greater efficiency in the coordination of ASEAN organs and for more effective implementation of ASEAN projects and activities

Brunei Darussalam then joined on 7 January 1984, Viet Nam on 28 July 1995, Lao PDR and Myanmar on 23 July 1997, and Cambodia on 30 April 1999, making up what is today the ten Member States of ASEAN.