Lihou () is a small tidal island (95 vergées; 38½ acres; 15.6 hectares) that is part of the Bailiwick of Guernsey, Channel Islands. It lies off the west coast of Guernsey and is the most westerly point in the Channel Islands. Coordinates: . The island was bought by the States of Guernsey in January 1995. Lihou is connected to Guernsey at low tide by an ancient stone causeway between the island and L'Eree headland. It is part of the Parish of St. Peter's. Lihou's bird and marine life makes it an important conservation area.