[6] At the time of the 2006 National Census, the Zanjan County's population was 442,728 in 113,883 households.

[7] The following census in 2011 counted 486,495 people in 137,832 households.

[8] The 2016 census measured the population of the county as 521,302 in 159,020 households.

[2] Zanjan County's population history and administrative structure over three consecutive censuses are shown in the following table.

Media related to Zanjan County at Wikimedia Commons Iran portal