Kaj, Chaharmahal and Bakhtiari

Kaj is a city in the Central District of Ardal County, Chaharmahal and Bakhtiari province, Iran.

Ethnicity
The city is populated by Lurs.

Population
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. The following census in 2011 counted 4,027 people in 982 households. The 2016 census measured the population as 4,227 people in 1,167 households, by which time Kaj had been elevated to the status of a city.