Newcastle, also commonly referred to as Greater Newcastle is a regional metropolitan area and the second-most-populous district of New South Wales, Australia. It includes the cities of Newcastle and Lake Macquarie and it is the hub of the Lower Hunter region, which includes most parts of the cities of Newcastle, Lake Macquarie, Maitland, Cessnock, and Port Stephens CouncilNewcastle is also known by its colloquial nickname, Newy.