The Central District of Sareyn County (Persian: بخش مرکزی شهرستان سرعین) is a district (bakhsh) in Sareyn County, Ardabil Province, Iran. At the 2006 census, its population was 7,844, in 1,718 families, excluding the capital, Sareyn, and 12,322, in 2,853 families including Sareyn. The District has one city: Sareyn.