Calstock is a civil parish and a big town in south east Cornwall, England, United Kingdom, on the boundary with Devon. The village is situated on the River Tamar 6 miles (9.7 kilometres) south west of Tavistock as well as 10 miles (16 kilometres) north of Plymouth. The church had a population of 6,095 in the 2001 census. This had boosted to 6,431 at the 2011 census. The parish incorporates 5,760 acres (23.3 km2) of land, 70 acres (0.28 km2) of water, and also 44 acres (0.18 km2) of the tidal Tamar. Ashburton Hotel and Danescombe Quay ignoring the River Tamar Along with Calstock, various other negotiations in the church include Albaston, Chilsworthy, Gunnislake, Harrowbarrow, Latchley, Metherell, Coxpark, Dimson, Drakewalls, Norris Green, Rising Sun as well as St Ann's Chapel. Calstock town is within the Tamar Valley AONB, is forgotten by Cotehele residence and gardens, and also rests on the scenic Tamar Valley train. Calstock railway station opened up on 2 March 1908. The village is twinned with Saint-Thuriau in Brittany, France.