The Economic Cooperation Organization or ECO is an Eurasian political and economic intergovernmental organization that was founded in 1985 in Tehran by the leaders of Iran, Pakistan, and Turkey. It provides a platform to discuss ways to improve development and promote trade and investment opportunities. The ECO is an ad hoc organisation under the United Nations Charter. The objective is to establish a single market for goods and services, much like the European Union. After the dissolution of the Soviet Union, the ECO expanded to include Afghanistan, Azerbaijan, Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan in 1992.

Iran, also known as Persia and officially the Islamic Republic of Iran (IRI), is a country in West Asia. It is bordered by Iraq to the west and Turkey to the northwest, Azerbaijan, Armenia, the Caspian Sea and Turkmenistan to the north, Afghanistan to the east, Pakistan to the southeast, the Gulf of Oman and the Persian Gulf to the south. With a mostly Persian-ethnic population of almost 90 million in an area of 1,648,195 km2, Iran ranks 17th globally in both geographic size and population. It is the sixth-largest country entirely in Asia, the second-largest in West Asia, and one of the world's most mountainous countries. Officially an Islamic republic, Iran has a Muslim-majority population. The country is divided into five regions with 31 provinces. The nation's capital and most populous city is Tehran, with around 16 million people in its metropolitan area. Other major cities include Mashhad, Isfahan, Karaj, and Shiraz.