Box Hill is a suburb of Sydney, in the state of New South Wales, Australia.

Box Hill Precinct is planned under the NSW Government's North West Priority Growth Area along with other release areas, such as North Kellyville.

By completion Box Hill will be home to approximately 42,480 residents (13,276 dwellings).

In July 2020, a portion of Box Hill in the north was carved out and became the separate suburb of Gables.

It also absorbed two small areas of Rouse Hill.