The Inner West of Sydney is an area directly west of the Sydney central business district, New South Wales, Australia. The suburbs that make up the Inner West are predominantly located along the southern shore of Port Jackson (Parramatta River), stretching south to the shores of the Cooks River. The western boundary of the Inner West is approximately the A3 arterial road (Homebush Bay Drive / Centenary Drive), which divides the Inner West from the Greater Western Sydney region. The Inner West is much larger than the Inner West Council local government area. The Inner West roughly corresponds with the Parish of Petersham and Parish of Concord, two cadastral divisions used for land titles.
The boundaries of the Inner West region are customary, not administrative or legal, and as such are defined differently in different contexts. The northern and southern boundaries are natural and thus generally well defined: they are the Parramatta River and the Cooks River respectively.
In the west, the upper reaches of the Cooks River flow close to, but do not meet, the Parramatta River, and the western boundary is thus ill-defined. Near the source of the Cooks River and at the point at which the two rivers run closest to each other, a large, uninhabited area stretches between the two rivers, occupied by the Enfield rail yards (now the Enfield Intermodel Logistics Centre), the Chullora rail yards, Rookwood Cemetery, Flemington Maintenance Depot, and former industrial land stretching north to the shores of Homebush Bay, which is now Sydney Olympic Park. This geographical dividing strip has long coincided with council boundaries: the former municipalities of Concord, Homebush and Strathfield lay to its east, while the former municipalities of Rookwood and Bankstown lay to its west. The creek marking the former boundary between Homebush and Rookwood is named "Boundary Creek". Since the new A3 arterial road (Homebush Bay Drive / Centenary Drive) was built along this strip at the end of the 20th century, that road is now often regarded as the more precise boundary line between the Inner West and Greater Western Sydney.