Kilan is a city in the Central District of Damavand County, Tehran province, Iran. At the time of the 2006 National Census, the city's population w…Kilan is a city in the Central District of Damavand County, Tehran province, Iran. At the time of the 2006 National Census, the city's population was 3,038 in 913 households. The following census in 2011 counted 2,981 people in 902 households. The 2016 census measured the population of the city as 2,882 people in 927 households.