DENGE-MARSH, a hamlet and member of the town and cinque-port of NEW-ROMNEY, in the parish of LYDD, liberty of ROMNEY-MARSH, though locally in the hundred of Langport, lathe of SHEPWAY, county of KENT, 1 mile (S. by E.) from Lydd. It is bounded by the English channel on the south, where stands Dengeness light-house, for the guidance of mariners, which was projected by a Mr. Allen, of Rye, in the reign of James I.