The Hawthorne Canal, a southern tributary of the Parramatta River, is a heritage–listed artificial waterway located in the western reaches of Sydney Harbour, in the inner–western Sydney suburbs of Lewisham, Summer Hill, Haberfield, and Leichhardt in New South Wales, Australia. Hawthorne Canal and Iron Cove Creek are two significant tributaries that flow into Iron Cove, where it flows into Parramatta River, before connecting with Port Jackson. The canal was originally a natural waterway known as Long Cove Creek, that has been straightened and given artificial banks.