Mount Colah, NSW
By Lauren McCaleb · Reviewed by Dylan Duncan ·
Among Australia's more advantaged suburbs
Mount Colah is more socio-economically advantaged than about 95% of the 14,462 Australian suburbs we score, based on the ABS SEIFA index (raw score 1104, 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.
Mount Colah at a glance
- Population (2021)
- 7,816
- Median age
- 40
- Median weekly household income
- $2,505
- SEIFA score
- 1104
- Coordinates
- -33.6649, 151.1155
Mount Colah demographics (2021 Census)
The figures below profile Mount Colah 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 mid-life (45–64) at 29%, 18% of homes are rented, and 33% of residents were born overseas.
Age profile
| Age group | People | Share |
|---|---|---|
| Children (0–14) | 1,552 | 20% |
| Youth (15–24) | 945 | 12% |
| Young adults (25–44) | 1,982 | 25% |
| Mid-life (45–64) | 2,281 | 29% |
| Seniors (65+) | 1,047 | 13% |
Share of the 7,807 people counted by age.
Housing and households
| Tenure | Dwellings | Share |
|---|---|---|
| Owned outright | 880 | 33% |
| Owned with a mortgage | 1,289 | 48% |
| Rented | 473 | 18% |
| Dwelling type | Dwellings | Share |
|---|---|---|
| Houses | 2,236 | 84% |
| Townhouses & semis | 100 | 4% |
| Flats & apartments | 328 | 12% |
Tenure and dwelling shares are of the roughly 2,669 occupied private dwellings in Mount Colah.
- Median weekly rent
- $525
- Median monthly mortgage
- $2,544
- Average household size
- 2.9 people
- Median weekly family income
- $2,805
- Median weekly personal income
- $1,032
Community and culture
- Born overseas
- 2,565 (33%)
- Speaks a language other than English at home
- 2,009 (26%)
- Aboriginal and/or Torres Strait Islander
- 67 (1%)
Work and education
- Completed Year 12
- 4,421 (75%)
- Labour-force participation
- 69.9%
- Unemployment rate
- 3.5%
- Employed full-time
- 2,526
- Employed part-time
- 1,300
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 Mount Colah
Based on 2014–2023 records, the warmest month in Mount Colah 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 Mount Colah
Where is Mount Colah?
Mount Colah is a suburb of New South Wales, Australia.
What is the population of Mount Colah?
At the 2021 Census, Mount Colah had a population of about 7,816.
Is Mount Colah an advantaged area?
Mount Colah has an ABS SEIFA score of 1104, where about 1000 is the national average — higher scores indicate greater relative socio-economic advantage. That gives it a Suburb Score of 95 out of 100 — more socio-economically advantaged than about 95% of Australian suburbs.
What is the weather like in Mount Colah?
Mount Colah 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).
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