Qarah Bashlu Rural District () is in Chapeshlu District of Dargaz County, Razavi Khorasan province, Iran. It is administered from the city of Chapeshlu.
At the time of the 2006 National Census, the rural district's population was 5,118 in 1,212 households. There were 4,745 inhabitants in 1,413 households at the following census of 2011. The 2016 census measured the population of the rural district as 4,897 in 1,529 households. The most populous of its 34 villages was Besharat, with 502 people.