Eastern Creek is a suburb of Sydney, in the state of New South Wales, Australia. Eastern Creek is located 35 kilometres (22 mi) west of the Sydney central business district, in the Blacktown local government area and is part of the Greater Western Sydney region. Eastern Creek is west of the Prospect Reservoir and is most notable for containing Sydney Motorsport Park (previously known as Eastern Creek Raceway), the Western Sydney International Dragway, and the former site of Wonderland Sydney amusement park.