Pancrasweek is a civil parish and hamlet in the far west of Devon, England forming part of the local government district of Torridge and lying about three miles north west of the town of Holsworthy. It is bordered clockwise from the north by the Devon parishes of Bradworthy, Holsworthy Hamlets, a small part of Pyworthy, and Bridgerule. The parish consists of small scattered settlements with a population of 217 in 2001, down from 277 in 1901. It is bounded to the west by the River Tamar (in its upper course) which for much of its length delineates Cornwall's border with Devon; a small part of the parish of Pancrasweek (including the farms/hamlets of Hudson and Dexbeer) however extends across the river onto the west side.