Qarah Aqaj () is a village in Jargalan Rural District of Jargalan District in Raz and Jargalan County, North Khorasan province, Iran.
At the time of the 2006 National Census, the village's population was 722 in 177 households, when it was in the former Raz and Jargalan District of Bojnord County. The following census in 2011 counted 2,732 people in 643 households. The 2016 census measured the population of the village as 481 people in 119 households, by which time the district had been separated from the county in the establishment of Raz and Jargalan County. The rural district was transferred to the new Jargalan District.