Arwenack, historically in the parish of St Budock, Cornwall, is a historic manor on the site of what is today the town of Falmouth. It was partly destroyed in 1646, and only a remnant survives today. It was long held by the Killigrew family, which was responsible for the development of the town of Falmouth, Sir Peter Killigrew (died 1667), MP, having received a royal charter for its foundation in 1661.