Ellenbrook is a northeastern suburb of Perth, Western Australia, about 30 km (19 mi) from Perth's central business district (CBD), located within the City of Swan. Ellenbrook, and its neighbouring suburbs of The Vines and Aveley, are unusual for Perth in being a significant distance from neighbouring suburbs. Given this relative isolation and the distance from the CBD, Ellenbrook has been designed and developed as a self-sustainable community. Since the upgrade of Gnangara Road and the completion of the Tonkin Highway Northlink, access to Ellenbrook has improved. The Morley–Ellenbrook railway line is well underway as at June 2021 and this will enable better public transport. At the time of the 2016 census there were 22,681 people living in the gazetted suburb, by June 2018, it was estimated that the urban population for Ellenbrook and surrounds had grown to 41,382. It is envisioned that Ellenbrook will eventually become a satellite city, with a population of 80,000.

The City of Swan is a local government area of Western Australia. It is in the eastern metropolitan region of Perth and includes the Swan Valley and 42 suburbs. It is centred approximately 20 km north-east of the Perth central business district. The City covers an area of 1,042 km2 and had an estimated population of 155,653 in 2020.