After the 2006 National Census,
Zaboli District was separated from
Saravan County, and
Ashar District from
Sarbaz County, in the establishment of Zaboli County, which was divided into two districts of two rural districts each, with
Zaboli as its capital and only city at the time. After the 2016 census,
Dehi Rural District was created in the
Central District and
Birk Rural District was separated from it in the formation of
Birk District, including the new
Birk-e Sharqi Rural District. The village of
Ashar was elevated to the status of a city. ==Demographics==