Westmead is bounded by the Parramatta River, Toongabbie Creek and Finlayson Creek in the north. On the east it is bounded by Parramatta Park, the Parramatta Golf Club, Amos Street and Good Street. The southern boundary is the Great Western Highway. The western boundary is Bridge Road and Darcy Road.
With the British settlement of Parramatta, Westmead was originally part of the domain of Government House. What is left of this domain, including Government House, form Parramatta Park. The name Westmead came into use when the governor's domain was first subdivided in 1859. The subdivision of the domain was completed in 1889. The Northern Meadow and Western Meadow of the domain were split off and called Northmead and Westmead. From this time orchards were established by many new settlers, including some whose names were well known in the Parramatta area - George Oakes, Nat Payten and William Fullagar among them.
Parramatta Marist School was established by Fr. John Therry in Hunter Street Parramatta in 1820, under the direction of Mr. George Morley. The school was transferred to the site of the present junior school in 1837 and entrusted to the care of the Marist Brothers in 1875. This makes Parramatta Marist the oldest Catholic school in Australia.
Royal Alexandra Hospital for Children
Health is the major employer in the area, with large public hospitals for both adults and children, a mental health hospital, a private hospital and three medical research facilities spanning basic, genetic and molecular science for both adults and children. A community foundation supports fundraising and awareness activities of Westmead.
Westmead Public School  was established in 1917, when an Infants' School opened in a rented Church of England hall in April of that year. By 1919 the present site was acquired, and the first purpose-built school building was opened in May 1920. In 1923 the building was extended to provide accommodation for Primary students. Within two years the growing local population created demand for additional accommodation for Primary students. At the present day Westmead Public School is one of the best primary schools in NSW, with high academic, sporting and art achievements. It schools over 900 children and has many professional teachers and staff.
The Catherine McAuley Catholic High School  is an all Girls school located on the same campus as Parramatta Marist High School 
Westmead Christian Grammar School (formerly Essington Christian Academy) was established at the site of Essington House in 1983. It provides a Christian Education for students from Kindergarten through to Year 6. 
Bus transitway service Westmead from both Parramatta and The Hills District via the North-West T-way.
On the day of the 2011 census, 39% of employed people traveled to work on public transport and 43% by car (either as driver or as passenger).
At the 2011 census, the suburb of Westmead recorded a population of 14,171. Of these:
Age distribution: Residents were notably younger than the country overall. The median age was 31 years, compared to the national median of 37 years. Children aged under 15 years made up 19.5% of the population (national average is 19.3%) and people aged 65 years and over made up just 8.1% of the population (national average is 14.0%).
Ethnic diversity : Just under one-third (30%) were born in Australia, compared to the national average of 70%; the next most common countries of birth were India 30%, China 6%, and Sri Lanka 4%. At home, 26% of residents only spoke English; other languages spoken at home included Hindi 8.8%, Gujarati 7.7%, Tamil 6.4%, Mandarin 5.3% and Telugu 5.1%.
Finances: The median household weekly income was $1,475, slightly more than the national median of $1,234. This minor difference is also reflected in real estate prices, with the median mortgage payment in Westmead being $2,000 per month, compared to the national median of $1,800.
Transport: On the day of the Census, 39% of employed people traveled to work on public transport and 43% by car (either as driver or as passenger).
Housing: More than two-thirds (68%) of occupied private dwellings were flats, units or apartments; 20% were separate houses, and 12.5% were semi-detached (row or terrace houses, townhouses etc.). The average household size was 2.6 people.
Religion: The most common religious affiliations were Hinduism 33%, Catholic 16%, No Religion 11%, and Islam 8%.