Arsanjan County (Persian: شهرستان ارسنجان) is a county in Fars Province in Iran. The capital of the county is Arsanjan. At the 2006 census, the county's population was 40,916, in 9,800 families. The county has one district: the Central District. The county has one city: Arsanjan. It is at an altitude of 1,638 metres (5,374 ft).