Brookfield is a residential suburb immediately west of Melton South, 36 km north-west of central Melbourne. Its western boundary is Djerriwarrh Creek, which is also Melton shire’s western boundary. From north to south it extends from the Western Freeway to the railway line to Ballarat.

Brookfield’s earliest housing area was adjacent to Melton South in the early 1980s. The name was that of the first real estate area, possibly inspired by Arnold Creek and two other streams that run south of the Werribee River. All have actual or proposed linear parks.

The Melton Christian College (1985) is west of Brookfield’s first housing area, and there are retirement villages and a child care centre in the vicinity. Shopping is done at the Woodgrove drive-in shopping centre, Melton West, on the other side of the freeway. Brookfield has considerable undeveloped land. Some homeowners complained of a 'waffle slab' phenomenon that caused slab heave problems after construction.

Its census populations have been:

census date population
2006 3168
2011 6104