South Western Sydney is a region of the metropolitan area in southwest Sydney, New South Wales, Australia. It is part of the predominantly working class area of Greater Western Sydney. The region lies in the Cumberland Plain.

There are a number of different boundaries and definitions for Sydney's South-West with majority of definitions including the suburbs within City of Liverpool as well as surrounding areas.

This can also include the Macarthur region which is often referred to as 'Outer South-West',^[1] particularly referring to the local government area of City of Campbelltown as well as Camden Council and occasionally also the Wollondilly Shire.

City of Canterbury-Bankstown is also often included in definitions of Sydney's South-West and usually referenced as being 'Inner South-West'.^[2]

In the broadest sense, South-Western Sydney can also include Fairfield City Council as it is south of Prospect Reservoir even though geographically the council is west of Sydney CBD and not south-west.^[3]

Several institutions have 'South Western Sydney' in their title, including:

• South Western Sydney Local Health District ^[4]
• South Western Sydney Institute ^[5]
• South Western Sydney Clinical School^[6]

• Southern Sydney
• St George Area
• Greater Western Sydney
• Macarthur Region
• Regions of Sydney
• Western Sydney
• Geography of Sydney