Tehran

Tehran is the largest city in the Middle East and is the 16th most populated city in the world with a population of around 7 million people. Most Iranian industries are headquartered in Tehran, including the manufacturing of automobiles, electrical equipment, military weaponry, textiles, sugar, cement, and chemical products. Tehran is also a leading center for the sale of carpets and furniture. There is an oil refinery located south of the city.

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- Tehran saw a drastic change in its ethno-social composition in early 1980s. Following the political, social and economic consequences of the Islamic Revolution of Iran in 1979 and onwards, many Iranian citizens, mostly Tehranis left Iran due to mounting political, social and most importantly religious pressure. Many Iranians fled to countries such as Canada, the United States, Japan, Australia, Sweden and other European countries. The highest Iranian emigration has been to the United States and Canada.