Macquarie Lighthouse, Lighthouse in Vaucluse, Australia

Macquarie Lighthouse is a heritage-listed sandstone tower designed by James Barnet and built from 1881 to 1883 on Dunbar Head, about 2 km south of South Head near the entrance to Sydney Harbour. It stands on the site of Australia's first lighthouse, begun in 1816 to Francis Greenway's design, and remains fully operational under the Australian Maritime Safety Authority.

Governor Macquarie had the original structure built in 1816, making it Australia's first lighthouse. The current building dates from 1883 and replaced the earlier construction.

The lighthouse appears on the coat of arms of Macquarie University and, as a simplified line drawing, forms the logo of Woollahra Council, the local government area that contains it. The site is also known as South Head Upper Light.

The lightstation sits on Dunbar Head at the end of Old South Head Road in Vaucluse, about 2 km south of South Head, and the grounds are managed by the Sydney Harbour Federation Trust. Access is on foot, with coastal walking tracks and lookouts nearby; paths and sandstone ledges can be slippery when wet, so wear sturdy shoes.

Francis Greenway, a convicted forger, became an architect and designed the original structure using local sandstone. He earned his freedom through this project and later became a respected colonial architect.