- کشور: ایران
- شهر: Qazvin
- جمعیت: 600,000 نفر
- مساحت: 64,132 کیلومترمربع
شهردار: Mahdi Sabbaghi
Qazvin , also Romanized as Qazvīn, Qazwin, Kazvin, Kasvin, Caspin, Casbin, Casbeen, or Ghazvin) is a city in the Central District of Qazvin County, Qazvin province, Iran, and serves as the capital of the district, county, and province. It is the largest city in Qazvin province.
Qazvin was a capital of the Safavid dynasty for over forty years (1555–1598) and nowadays is known as the calligraphy capital of Iran. It is famous for its traditional confectioneries (like baghlava), carpet patterns, poets, political newspaper and Pahlavi influence on its accent.
At the 2006 census, its population was 349,821 in 96,420 households. The following census in 2011 counted 381,598 people in 114,662 households. The 2016 census showed a population of 402,748 people in 127,154 households.
Located in 150 km (93 mi) northwest of Tehran, in the Qazvin Province, it is at an altitude of about 1,800 m (5,900 ft) above sea level. Due to its position at the south of the rugged Alborz range called KTS Atabakiyam, its climate is cold but dry.