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.

[2] The train involved in the disaster consisted of eight passenger carriages hauled by 46 class electric locomotive 4620, and had commenced its journey towards Sydney from Mount Victoria in the Blue Mountains at 6:09 a.m.[3] At approximately 8:10 a.m. it was approaching Granville railway station when the locomotive derailed and struck one of the steel-and-concrete pillars supporting the bridge carrying Bold Street over the railway cutting.

[5] Of the total number of passengers travelling in the third and fourth carriages, half were killed instantly when the bridge fell on them, crushing them in their seats.

[4] Several injured passengers were trapped in the train for hours after the accident, with part of the bridge crushing a limb or torso.

Soon after, the bridge settled a further 5 centimetres (2 in) onto the train, trapping two rescuers and crushing a portable generator "like butter".

[4] The train driver, the assistant crewman, the "second man", and the motorists including one motorcyclist[8] driving on the fallen bridge all survived.

[12] In 2007, a plaque was placed on the bridge to mark the efforts of railway workers who assisted in rescuing survivors from the train.