The Granville rail disaster occurred on Tuesday 18 January 1977 at Granville, a western suburb of Sydney, New South Wales, Australia, when a crowded commuter train derailed, running into the supports of a road bridge that collapsed onto two of the train's passenger carriages. The official inquiry found the primary cause of the crash to be poor fastening of the track.

Granville is a suburb in Western Sydney, in the state of New South Wales, Australia. Granville is located 18 kilometres (11 mi) west of the Sydney central business district, split between the local government areas of Cumberland City Council and the City of Parramatta.