Grishk (), also spelled Girishk or Gereshk, is a town in Grishk District in Helmand province on the Helmand River in Afghanistan, some northwest of Kandahar, at altitude. Upstream lies the Kajaki Dam which diverts water to the Boghra Irrigation Canal, an essential infrastructure for the region's crops. Grishk Dam is also nearby. Grishk was originally built around a fort on the east bank of the river but was later rebuilt on the west. The fort was twice captured by the British: first in the First Anglo-Afghan War and again in 1879. In both cases the fort was later abandoned. Grishk has a population of about 48,546 and has a hospital and a school of engineering which was built back in 1957.