The history of Tehran province is correlated with the history of Rey. Rey has been an important town for many centuries. Tehran has been a hot domestic migration destination in recent decades and currently hosts diverse ethnicities from all around Iran.
Tehran province contains, Tehran, the capital of Iran. This province is surrounded by Mazandaran, Semnan, Qom Markazi, and Alborz provinces.
Alborz mountains in the north and Qom deserts in the south influence the climate of Tehran province.