Cumberland Plain ligger i kommunene Auburn Council, Baulkham Hills Shire, City of Blacktown, Camden Council, , City of Canada Bay City of Fairfield, City of Hawkesbury, Hornsby Shire, City of Holroyd, City of Liverpool, City of Parramatta, City of Penrith, City of Ryde og Wollondilly Shire; og deler av City of Campbelltown og flere kommuner i Sydneys indre-vest.