Zanjan is a city in the Central District of Zanjan County, Zanjan province, Iran, serving as capital of the province, the county, and the district.

Zanjan province, or Zangan province, is one of the 31 provinces of Iran, whose capital is the city of Zanjan. It is a mountainous province with close to 22,000 km2 of land placed in Iran's Region 3. Two-thirds of the people of the province live in the cities, mainly the capital and Abhar.