Werrington (Cornish: Trewolvredow)[1] is a civil parish and former manor now in Cornwall, England, United Kingdom. Prior to boundary changes it straddled the Tamar and lay within the county of Devon. The portion on the west side was transferred to Cornwall by the abolition of Broadwoodwidger Rural District by the Local Government Commission for England in 1966.[2][3][4] It is situated 1 mile (1.6 km) to the west of the Tamar, the traditional boundary between Devon and Cornwall, and 1 mile (1.6 km) north of Launceston.