Greater Tehran is the metropolitan urban area in Tehran Province that covers the contiguous cities of Tehran, Ray, Karaj, Islamshahr, Hesarak, Shemiran, Varamin, and other areas. Tehran province has been the seat of Irans capital, Tehran, since 1778. ... Tehran (IPA: ; Persian: تهران, also transliterated as Teheran or Tehrān), population 7,160,094 (metropolitan: 14,000,000), and a land area of 658 square kilometers, is the capital city of Iran and the center of Tehran Province. ... Ray, is one of the oldest cities of Iran. ... Karaj Country Iran Province Tehran Population 2,549,719 (2005) Area 2,452 km² Coordinates Lat. ... Shemiran (sometimes Shemiranat) is the name of the northern part of the city of Tehran, capital of Iran. ... Varamin is a city located in the south of Tehran Province, Iran. ...

According to some estimates, Greater Tehran hosts a population of close to 15 million residents.