The Sydney Heads are a series of headlands that form the 2 km wide entrance to Sydney Harbour in Sydney, New South Wales, Australia. North Head and Quarantine Head are to the north; South Head and Dunbar Head are to the south; and Middle Head, Georges Head, and Chowder Head are to the west and within the harbour. The Heads are contained within the Sydney Harbour National Park.
Some features located on the heads are heritage-listed on the Australian National Heritage List; such as the Hornby Lighthouse, located on South Head, Australia's third-oldest lighthouse; Macquarie Lighthouse, Australia's first lighthouse, located 3 kilometres to the south on Dunbar Head; and the former Quarantine Station on North Head.