Carlingford is a suburb of Sydney, in the state of New South Wales, Australia. Carlingford is 22 kilometres north-west of the Sydney central business district in the local government area of City of Parramatta. Carlingford sits at the meeting point of Northern Sydney and Western Sydney sitting on both sides of Pennant Hills Road which generally acts as a divider of the two regions. While being part of City of Parramatta, it is sometimes referred to as being part of the Hills District.

The City of Parramatta, also known as Parramatta Council, is a local government area located to the west and north-west of Sydney CBD in the Greater Western Sydney region. Parramatta Council is situated between the City of Ryde and Cumberland, where the Cumberland Plain meets the Hornsby Plateau, approximately 25 kilometres (16 mi) west of the Sydney central business district, in New South Wales, Australia. The city occupies an area of 84 square kilometres (32 sq mi) spanning across suburbs in Greater Western Sydney including the Hills District, and a small section of Northern Sydney to the far north east of its area. According to the 2016 census, City of Parramatta had an estimated population of 226,149. The city houses the Parramatta central business district which is one of the key suburban employment destinations for the region of Greater Western Sydney.