Kaj (Persian: كاج)[a] is a city in the Central District of Ardal County, Chaharmahal and Bakhtiari province, Iran.

[4] At the time of the 2006 National Census, Kaj's population was 3,774 in 800 households, when it was a village in Poshtkuh Rural District.

[5] The following census in 2011 counted 4,027 people in 982 households.

[6] The 2016 census measured the population as 4,227 people in 1,167 households,[2] by which time Kaj had been elevated to the status of a city.

This Ardal County location article is a stub.