Qasr-e-Shirin County (Persian: شهرستان قصر شیرین‎) is a county in Kermanshah Province in Iran, part of what is unofficially referred to as Iranian Kurdistan. The capital of the county is Qasr-e Shirin. At the 2006 census, the county's population was 25,000, in 4,999 families. The county is subdivided into two districts: the Central District and Sumar District.