Baulkham Hills, NSW
By Lauren McCaleb · Reviewed by Dylan Duncan ·
Baulkham Hills is a suburb in the Hills District of Greater Sydney, about 30 kilometres north-west of the central business district and largely inside The Hills Shire, which it once gave its name to and served as the seat of. The land was originally home to the Bidjigal people, understood to be a clan of the Darug, who are remembered today in the Bidjigal Reserve spreading across several neighbouring suburbs. One of the district's first European settlers, William Joyce, took up a grant here in the 1790s and built a farmhouse that still stands. The suburb's name came from Andrew McDougall, a settler who thought the area resembled Buckholm Hills near his home in the Scottish county of Roxburgh; it was officially recognised in 1802, and the post office followed in 1856. Long a farming district of orchards and smallholdings, Baulkham Hills was subdivided for housing through the 20th century and is now a busy residential centre served by the Sydney Metro Northwest line. Its Orange Blossom Festival, a nod to the area's citrus-growing past, is held each spring.
Among Australia's more advantaged suburbs
Baulkham Hills is more socio-economically advantaged than about 96% of the 14,462 Australian suburbs we score, based on the ABS SEIFA index (raw score 1111, where about 1000 is the national average).
A socio-economic measure from ABS Census data — not a measure of how good a suburb is to live in or visit. How we calculate this.
Baulkham Hills at a glance
- Population (2021)
- 37,415
- Median age
- 39
- Median weekly household income
- $2,474
- SEIFA score
- 1111
- Coordinates
- -33.7537, 150.9834
Baulkham Hills demographics (2021 Census)
The figures below profile Baulkham Hills using the Australian Bureau of Statistics 2021 Census; every percentage is a share of a clearly stated Census count, so each one traces back to the source. At a glance, the largest age group is young adults (25–44) at 27%, 22% of homes are rented, and 42% of residents were born overseas.
Age profile
| Age group | People | Share |
|---|---|---|
| Children (0–14) | 8,108 | 22% |
| Youth (15–24) | 4,071 | 11% |
| Young adults (25–44) | 10,141 | 27% |
| Mid-life (45–64) | 9,046 | 24% |
| Seniors (65+) | 6,050 | 16% |
Share of the 37,416 people counted by age.
Housing and households
| Tenure | Dwellings | Share |
|---|---|---|
| Owned outright | 4,007 | 33% |
| Owned with a mortgage | 5,277 | 43% |
| Rented | 2,740 | 22% |
| Dwelling type | Dwellings | Share |
|---|---|---|
| Houses | 9,256 | 75% |
| Townhouses & semis | 1,630 | 13% |
| Flats & apartments | 1,383 | 11% |
Tenure and dwelling shares are of the roughly 12,281 occupied private dwellings in Baulkham Hills.
- Median weekly rent
- $520
- Median monthly mortgage
- $2,600
- Average household size
- 3 people
- Median weekly family income
- $2,748
- Median weekly personal income
- $973
Community and culture
- Born overseas
- 15,343 (42%)
- Speaks a language other than English at home
- 15,632 (43%)
- Aboriginal and/or Torres Strait Islander
- 223 (1%)
Work and education
- Completed Year 12
- 20,811 (75%)
- Labour-force participation
- 64.4%
- Unemployment rate
- 4.4%
- Employed full-time
- 11,171
- Employed part-time
- 5,049
Source: ABS Census of Population and Housing, 2021 (General Community Profile, by Suburb and Locality). © Australian Bureau of Statistics, released under CC BY 4.0. How we group bands and derive each share is set out on our methodology page.
Weather and climate in Baulkham Hills
Based on 2014–2023 records, the warmest month in Baulkham Hills is January (average daytime high around 28.4°C) and the coolest is July (around 16.8°C). The area receives roughly 854 mm of rain across the year.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 28.4°C | 18.6°C | 85 mm |
| Feb | 27.1°C | 18.1°C | 92 mm |
| Mar | 25.4°C | 16.9°C | 139 mm |
| Apr | 22.9°C | 13.6°C | 72 mm |
| May | 19.7°C | 10°C | 37 mm |
| Jun | 16.7°C | 8°C | 57 mm |
| Jul | 16.8°C | 7.1°C | 56 mm |
| Aug | 17.9°C | 7.6°C | 52 mm |
| Sep | 20.9°C | 9.8°C | 44 mm |
| Oct | 23.7°C | 12.6°C | 77 mm |
| Nov | 25.2°C | 14.7°C | 73 mm |
| Dec | 27.5°C | 16.9°C | 70 mm |
Climate normals, 2014–2023 (Open-Meteo, ERA5 reanalysis).
Common questions about Baulkham Hills
Where is Baulkham Hills?
Baulkham Hills is a suburb of New South Wales, Australia.
What is the population of Baulkham Hills?
At the 2021 Census, Baulkham Hills had a population of about 37,415.
Is Baulkham Hills an advantaged area?
Baulkham Hills has an ABS SEIFA score of 1111, where about 1000 is the national average — higher scores indicate greater relative socio-economic advantage. That gives it a Suburb Score of 96 out of 100 — more socio-economically advantaged than about 96% of Australian suburbs.
What is the weather like in Baulkham Hills?
Baulkham Hills has average daytime highs of about 22.7°C and overnight lows of about 12.8°C, with roughly 854 mm of rain across the year (based on 2014–2023 climate normals).
How big is Baulkham Hills?
Baulkham Hills is one of the most populous suburbs in New South Wales — the 7th-largest by usual resident population at the 2021 Census (about 37,415 usual residents).
Where Baulkham Hills ranks
Baulkham Hills appears in these data-driven guides — each a transparent sort on a single ABS figure shown on this page.
- Largest suburbs in New South Wales#7 of 25
- Largest suburbs in Australia#19 of 25
Nearby suburbs in New South Wales
More suburb guides in New South Wales
Other hand-written, cited guides — browse all guides.