Callaghan /kælə.hæn/ is a suburb of Newcastle, New South Wales, Australia 10 kilometres (6 mi) from Newcastle's central business district. It contains the main campus of the University of Newcastle. It is served by Warabrook railway station on NSW TrainLink's Hunter Line. The suburb was named after Sir Bede Callaghan (1912–1993), Chancellor of the University of Newcastle from 1977 to 1988.
Callaghan had a population of 653 in 2011.