Berastagi (meaning "rice store") is a town and subdistrict of Karo Regency situated on crossroads on the main route linking the Karo highlands of Northern Sumatra to the coastal city of Medan. The village rose to significance when Dutch settlers in Sumatra opened a boarding school there in the 1920s.
The main economic activities in Berastagi, centre on the colourful fruit and vegetable market and on tourism. Berastagi is famous for its passion fruit. The main attractions of the town are the two active volcanoes; Gunung Sibayak, with its hot springs, and Gunung Sinabung.
The town is also a stop on the way to Lake Toba. The dominant ethnic and linguisitic group is Karo Batak.
The population of Berastagi subdistrict is 46,686, as of 2009. It is the second-most populous subdistrict in Karo Regency, after Kabanjahe.
It borders Barusjahe and Tigapanah to the east, Simpang Empat, to the west, Deli Serdang Regency to the north, Kabanjahe to the soutth.
There are 9 desa in Berastagi subdistrict. It is the smallest (30.5 square kilometres), and most densely populated (1,530 persons/square kilometre) subdistrict of Karo Regency. Elevation is 1400 metres