According to the Article IV of the Treaty of Izmir, the Heads of State/Government of the Member States meet biennially or more often if considered necessary by the Member States. The Summit meetings review the objective conditions and progress in implementation of ECO programmes and projects in the highest-level forum possible exchanging views on regional and global issues of common interest to the ECO region.
Since ECO enlargement in 1992, 15 Summit meetings have been held. The last meeting, 15th ECO Summit, was held on November 28, 2021 in Ashgabat, Turkmanistan.
8th Summit (Dushanbe, 14 September, 2004)
The Eighth Summit meeting of the Economic Cooperation Organization (ECO), held on September 14, 2004
7th Summit (Istanbul, 14 October, 2002)
The 7th Summit of the Economic Cooperation Organization (ECO), held on October 14, 2002 in
6th Summit (Tehran, 10 June, 2000)
The Sixth Summit Meeting of the Economic Cooperation Organisation (ECO) was held in Tehran on
5th Summit (Almaty, 11 May, 1998)
The Fifth Summit Meeting of the Economic Cooperation Organisation (ECO) was held at Almaty on
Extraordinary Summit (Ashgabat, 13-14 May, 1997)
The Extraordinary Summit Meeting of the Economic Cooperation Organization (ECO) was held at Ashgabat on
4th Summit (Ashgabat, 14-15 May, 1996)
The Fourth Summit Meeting of the Economic Cooperation Organisation (ECO) was held at Ashgabat on
3rd Summit (Islamabad, 14-15 March, 1995)
The Third Summit Meeting of the Economic Cooperation Organization (ECO) was held in Islamabad on
2nd Summit (Istanbul, 6-7 July, 1993)
The Second Summit Meeting of the Economic Cooperation Organisation (ECO) was held in Istanbul on