The Kembla Grange derailment occurred on the early morning of 20 October 2021 near Kembla Grange railway station, New South Wales, Australia. The train derailed and collided at a level crossing, when a stolen van was placed in the middle of the crossing.

At approximately 4:00 am local time, a 47-year-old man stole a van and abandoned it on the level crossing at West Dapto Road, just due west of Kembla Grange railway station. Then a northbound interurban Tangara train, set T42, bound for Bondi Junction started approaching the railway station, the driver unaware of the van parked in the crossing ahead. At approximately 4:10 am, the Tangara collided into the abandoned van, and the first car of the train derailed and tipped over as it hit the vehicle. The rest of the three carraiges also derailed, and collided with each other, forming a zig-zagging mess. The first 000 call was made at 4:15 am, requesting for the fire brigade. They arrived shortly after. The driver and three of the ten passengers who were on board the train were taken to hospital.