The Boothtown Aqueduct is a heritage-listed 19th-century water bridge in Greystanes, Sydney, New South Wales, Australia. Established in 1888, the aqueduct was built to cross a valley to carry water from Prospect Reservoir to residents of Greater Western Sydney. Part of the Lower Prospect Canal Reserve, the aqueduct was the longest continuous concrete work of its kind in Australia in the late 19th century and early 20th century. It was listed in November 1991 in the New South Wales Heritage Database.