The Montague Island Light is a heritage-listed active lighthouse located on Barunguba / Montague Island, an island in the Tasman Sea, 9 kilometres (5.6 mi) offshore from Narooma on the south coast of New South Wales, Australia. The lighthouse is located at the highest point of the island. It was designed by James Barnet and NSW Colonial Architect and built from 1878 to 1881 by J. Musson and completed By W. H. Jennings. It is also known as the Montague Island Lightstation and its setting. The property is owned by the Office of Environment and Heritage, an agency of the Government of New South Wales. It was added to the New South Wales State Heritage Register on 2 April 1999, and the Commonwealth Heritage List on 22 June 2004.