Hashatjin (Persian: هشتجين, also Romanized as Hashatjīn and Heshajeyn, Heshajīn, and Heshīīn; also known as Hīshen, Shain, and Shein) is a city in and the capital of the Khvor Rostam District, in Khalkhal County, Ardabil Province, Iran. At the 2006 census, its population was 4,518, in 1,199 families.