The Qazvin Province (, Ostān-e Qazvīn) is one of the 31 provinces of Iran. It is in the north-west of the country, and its center is the city of Qazvin. The province was created in 1993 out of part of Tehran Province and includes 20 cities: Qazvin, Takestan, Abyek, Buin-Zahra, Eqhbalieh, Mohammadieh, Alvand, Esfarvarin, Mahmood Abad Nemooneh, Khoram Dasht, Ziä Abad, Avaj, Shäl, Danesfahan, Abgarm, Ardägh, Moallem Keläyeh, Razmian Kouhin and Bidestan in the form of four townships (chief cities) contains 18 sections, 44 rural districts, and 1543 villages.
The province was put as part of Region 1 upon the division of the provinces into 5 regions solely for coordination and development purposes on June 22nd, 2014.
The province had a population of 1.2 million people by the 2011 census, of which 68.05% lived in cities and 31.95% in villages. The ratio of men to women is 50.7 to 49.3%. 99.61% of the province population were Muslims and 0.39% of the rest came from other religions. The literacy rate is over 82%, ranking 7th in Iran.