Komijan County (Persian: شهرستان کمیجان) is a county in Markazi Province in Iran. The capital of the county is Komijan. At the 2006 census, the county's population was 45,296, in 11,539 families. The county is subdivided into two districts: the Central District and Milajerd District. The county has two cities: Komijan and Milajerd.
