"La provincia de Teherán (persa: ) es una de las 30 provincias de Irán, tiene más de 12 millones de habitantes y es la provincia más densamente poblada de Irán. Tiene una extensión de alrededor de 18.637 km² y se encuentra al norte de la meseta central iraní. La provincia de Teherán limita con las provincias de Mazandarán al norte, Qom al sur, Semnán al este y Qazvín al oeste. La ciudad de Teherán es la capital tanto de la provincia como del país, siendo el distrito central de la provincia. Otros distritos son: Shemiranat, Rey, Islam Shahr, la ciudad de Ray, Kara, arud, Lar, y Rud Shur. La provincia alcanzó su importancia cuando Teherán sustituyó, como capital, a Ghajar en 1778 con la dinastía Kayar. Hoy en día (2004) Teherán se encuentra entre las 20 ciudades más grandes del mundo."
"Tehran Province (Persian: Ostn-e Tehrn) is one of the 31 provinces of Iran. It covers an area of 18,909 square kilometres (7,301 sq mi) and is located to the north of the central plateau of Iran. The province was put as part of First Region with its secretariat located in its capital city, Tehran, upon the division of the provinces into 5 regions solely for coordination and development purposes on June 22, 2014. Tehran Province borders Mzandarn Province in the north, Qom Province in the south, Semnn Province in the east, and Alborz Province in the west. The metropolis of Tehran is the capital city of the province and of Iran. As of June 2005, this province includes 13 townships, 43 municipalities, and 1358 villages. Tehran Province is the richest province of Iran as it contributes approximately 29% of the country's GDP. Furthermore, it houses approximately 18% of the country's population. Tehran Province is the most industrialized province in Iran; 86.5% of its population resides in urban areas and 13.5% of its population resides in rural areas. The province gained importance when Tehran was claimed the capital by the Qajar dynasty in 1778. Today, Tehran, with a population of more than 7 million, is ranked amongst the 20 most populous metropolitan cities of the world."