Western Sydney Regional Park is a large urban park and a nature reserve situated in Western Sydney, Australia within the suburbs of Horsley Park and Abbotsbury. A precinct of Western Sydney Parklands, a park system, and situated within the heart of the Cumberland Plain Woodland, the regional park features several picnic areas, recreational facilities, equestrian trails, and walking paths within the Australian bush.

Abbotsbury is a suburb of Sydney, New South Wales, Australia 39 kilometres west of the Sydney central business district in the local government area of the City of Fairfield. Abbotsbury is part of the Greater Western Sydney region.