Calstock is situated in the Deanery and Hundred of East. It is separated on the North and East sides from the Devon parishes of Lamerton, Tavistock and Beer Ferris, by the River Tamar. It is bounded on the south by St Dominick, and on the West by Callington and Stoke Climsland. The village is mentioned in the Domesday Book of 1086 as Calestoch. Calstock town is situated on the banks of the Tamar. Besides Calstock town, the chief villages are Gunnislake (where there was a Chapel-of-ease), Albaston, Harrabear (now Harrowbarrow), Chilsworthy, Latchley and Metherell.