Derbyhaven (Manx: Camys y Ree) ("King's Harbour" or "King's Cove") is a hamlet near Castletown in the southern parish of Malew, Isle of Man. It is located on the isthmus connecting Langness Peninsula to the rest of the island, on the bay of the same name, and also on Castletown Bay on the other side of the isthmus.