Buin-Zahra County is a county in Qazvin Province in Iran. The capital of the county is Buin Zahra. At the 2006 census, the county's population was 153,873, in 38,377 families. The county consists of four districts: Ramand District, Shal District, the Central District, and Dashtabi District. The county has five cities: Buin Zahra, Ardak, Danesfahan, Sagezabad, and Shal. Most people of Buin Zahra County are Tat and they speak Tati.