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.
12th Summit and 20th COM
The 12th Summit Meeting of the Economic Cooperation Organization (ECO) was held in Baku, Republic
10th ECO Summit (Tehran, 11 March, 2009)
The 10th Summit Meeting of the Economic Cooperation Organization (ECO) was held in Tehran, the
8th Summit (Dushanbe, 14 September, 2004)
The Eighth Summit meeting of the Economic Cooperation Organization (ECO), held on September 14, 2004
1st Summit (Tehran, 16-17 February, 1992)
The First Summit Meeting of the Economic Cooperation Organization was held in Tehran on 16-17

15TH ECO SUMMIT, November 28, 2021 Ashgabat, Turkmenistan
15TH ECO SUMMIT,November 28, 2021Ashgabat, Turkmenistan

The 14Th ECO Summit (Virtual, March 4, 2021)
The Republic of Turkey organized the 14th ECO Summit virtually on March 4, 2021 under

13th ECO Summit (Islamabad, March 2017)
The 13th Summit Meeting of the Economic Cooperation Organization (ECO) was held on 1st March

12th Summit and 20th COM
The 12th Summit Meeting of the Economic Cooperation Organization (ECO) was held in Baku, Republic