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.

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.