Climate : Temperate
OldName : Shalos
Chalus County (Persian: شهرستان چالوس) is a county in Mazandaran Province in Iran. The capital of the county is Chalus. At the 2006 census, the county's population was 119,559, in 33,193 families. The county is subdivided into two districts: the Central District and Kelardasht District. The county has three cities: Chalus, Kelardasht, and Marzanabad.