 The Cumberland Plain starts westwards of the inner west, towards south-western Sydney, and into the Greater Western Sydney area.It is within the local government areas of Blacktown, Burwood, Camden, the western portion of Campbelltown, Canada Bay, Canterbury-Bankstown, Cumberland, Fairfield, Georges River,
Hawkesbury, the Western outskirts of the Inner West Council, Liverpool, Parramatta, Penrith, Ryde, Strathfield, The Hills Shire, Wingecarribee, and Wollondilly.The rest of the Sydney regions such as Sydney CBD (including the City of Sydney), North Shore, Northern Beaches, Eastern Suburbs, Southern Sydney (including Sutherland Shire), Hills District, Hornsby Shire and the Forest District do not lie in the Cumberland Plain.