Blacktown is a suburb in the City of Blacktown local government area, in the state of New South Wales, Australia. Blacktown is located 34 km (21 mi) west of the Sydney central business district. It is one of the most multicultural places within Greater Sydney.

According to the 2006 census, the most common way of getting to work from Blacktown was by car (74%) with public transport used by just under twenty percent. Most public transport was done by train (17%) with five percent catching buses for all or part of their journey. Blacktown railway station is on the North Shore & Western Line and the Cumberland Line of the Sydney Trains network. A major bus interchange is located next to the station and an underground bus station is at the entrance to Westpoint. Blacktown is a terminus of the North-West T-way.