The Gosford area is predominantly mountainous terrain with heath vegetation on the coastal strip and the remaining area open woodland. Gosford District has a large population of 166,662 (as at June 2009) with a large majority living on the coastal strip with industrial estates and housing estates intermingled with bush land. The Gosford area has the Sydney/Newcastle Expressway running from the Hawkesbury River to the south through to Wyong Council area to the north. The local government areas covers 1,029 square kilometres of land.