Delijan (Persian: دليجان)[a] is a city in the Central District of Delijan County, Markazi province, Iran, serving as capital of both the county and the district.

[citation needed] At the time of the 2006 National Census, the city's population was 31,852 in 8,779 households.

[6] The 2016 census measured the population of the city as 40,902 people in 12,612 households.

[2] Sites of interest include the 15th Khordad dam and Chal Nakhjir cave as well as its hot spring resort.

Also home of several companies producing a type of roof isolation called "Isogam".