Zabol About this sound pronunciation (Persian: زابل‎‎, also Romanized as Zābol) is a city in and the capital of Zabol County, Sistan and Baluchestan Province, Iran. Zabol lies on the border with Afghanistan. Referred to as Sistan until the late 1920s, the city was renamed Zabol by Reza Shah Pahlavi. At the 2006 census, its population was 130,642, in 27,867 families.Zabol is located near Lake Hamun and the region is irrigated by the Hirmand River.