Tehran is the capital and largest city of Iran. It serves as the administrative center for Tehran County and its Central District, while also functioning as the capital of Tehran province.
As the most populous city in both Iran and West Asia, Tehran has a population of approximately 9 million within the city limits and 16.8 million in its metropolitan area. This makes it the largest metropolitan area in the Middle East and ranks as the 24th-most-populous metropolitan area globally.
Greater Tehran encompasses several municipalities, including Eslamshahr, Shahriar, Qods, Malard, Golestan, Varamin, Pakdasht, Qarchak, Nasimshahr, Parand, Pardis, Andisheh, Fardis, Tajrish, and Rey.