Sydney Heads (also simply known as 'The Heads'), is the entrance to Port Jackson (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. Middle Head, Georges Head and Chowder Head are to the west and within the bay. The Hornby Lighthouse is located on South Head and is Australia's third oldest lighthouse. Macquarie Lighthouse, Australia's first lighthouse, is a few kilometres to the south on Dunbar Head.