The Barrenjoey Head Lighthouse is a heritage-listed lighthouse at Barrenjoey Headland, Palm Beach, Northern Beaches Council, New South Wales, Australia. It was designed by James Barnet, the New South Wales Colonial Architect and built by Isaac Banks. It is also known as Barrenjoey Head Lightstation. The property is owned by Office of Environment and Heritage, an agency of the Government of New South Wales. The lightstation was added to the New South Wales State Heritage Register on 2 April 1999.
Completed in 1881, the current lighthouse is the third light constructed on the Barrenjoey headland in the Northern Beaches district of Sydney. The light is automated and operated by Roads and Maritime Services; while the buildings are managed by the NSW National Parks & Wildlife Service.