Bradfield covers an area of approximately 99 sq km border east from Cowan Creek and Middle Harbour Creek to include the suburbs of St Ives Chase, St Ives, East Killara, East Lindfield and Roseville Chase.   The southern side border includes Roseville and Lindfield till the Lane Cove River crossing at Fullers Bridge.  The western border moves northwest including West Lindfield, West Killara, West Pymble, South Turramurra to Thornleigh.  The Northern Railway line marks the northern bordering along with the Pacific Hwy, Ku-ring-gai Chase Rd and Cockle Creek.  Suburbs include Wahroonga, Waitara, Hornsby and Asquith.