Farahan County (Persian: Ŝahrestāne Farāhān) is a county in Markazi Province in Iran. The capital of the county is Farmahin. At the 2006 census, the county's population was 31,152, in 8,900 families. The county has three districts: the Central District, Khenejin District, and Saruq District. The county has three cities: Farmahin, Khenejin and Saruq.