The Newcastle railway line is a branch railway line in the city of Newcastle, New South Wales, Australia. The line branches off the Main North line at Broadmeadow and travels in an easterly direction through the inner suburbs to Newcastle Interchange, with one intermediate station at Hamilton. Until its curtailment in December 2014, it extended to Newcastle station. NSW TrainLink operates electric passenger train services over this line as part of its Central Coast & Newcastle Line service, and diesel railcars to Maitland and beyond as part of the Hunter Line.

Newcastle or Greater Newcastle, locally nicknamed Newy, is a regional metropolitan area and the second-most-populated district in New South Wales, Australia. It includes the cities of Newcastle and Lake Macquarie; it is the hub of the Lower Hunter region, which includes most parts of the local government areas of City of Newcastle, City of Lake Macquarie, City of Maitland, City of Cessnock, and Port Stephens Council.