Qarah Bolagh () is a village in Shirang Rural District of Kamalan District in Aliabad-e Katul County, Golestan province, Iran.
At the time of the 2006 National Census, the village's population was 2,446 in 523 households. The following census in 2011 counted 2,980 people in 773 households. The 2016 census measured the population of the village as 3,308 people in 796 households. It was the most populous village in its rural district.