At the 2006 National Census, its population was 31,852 in 8,779 households.[3] The following census in 2011 counted 37,470 people in 11,031 households.[4] The latest census in 2016 showed a population of 40,902 people in 12,612 households.[5]
The native population of Delijan speaks a dialect they call Delijani (or Diligoni in the native language). The native language of Delijan seems to be a version of the old-Persian language, which is similar to the language spoken in Abyaneh one of the oldest Persian village located about an hour away from Delijan.Шаблон:Cn
Sites of interest include the 15th Khordad dam and Chal Nakhjir cave as well as its hot spring resort.Шаблон:Cn
Delijan is an industrial city and is home to several popular carpet companies like the Mahestan, Setareh Talaii and Said companies. Also home of several companies producing a type of roof isolation called "Isogam". The area northeast of Delijan is populated by seven villages, this area is referred to as Jasb Rural District. Moreover, Chal-nakhjir Cave or Delijan Cave[6] is one of the natural touristic attractions of Delijan.[7]