Parit Sulong is a small town in Batu Pahat District, Johor, Malaysia on the Simpang Kiri River, 30 km (19 mi) east of Muar.

The historical Parit Sulong Bridge constructed during World War II is a main feature in that town.

The first large massacre of 161 Australian troops by Japanese forces occurred at Parit Sulong on the west coast of Malaya on 22 January 1942.

Wounded survivors from the Battle of Muar who could not travel on foot were left at Parit Sulong when the remnants of the greatly outnumbered force of Australians and Indians escaped from the Japanese who surrounded them.

The officer who ordered the massacre, Lt General Takuma Nishimura, was tried and convicted of war crimes and executed by hanging on 11 June 1951.