Asquith - Mount Colah
Statistical Area - sa2

Population growth drivers in Asquith - Mount Colah are strong compared to national averages based on AreaSearch's ranking of recent, and medium to long-term trends

Asquith-Mount Colah's population is approximately 23,442 as of Aug 2025. This figure reflects an increase of 1,385 people since the 2021 Census, which reported a population of 22,057. The change was inferred from ABS data showing an estimated resident population of 23,312 in June 2024 and an additional 254 validated new addresses since the Census date. This results in a population density ratio of 675 persons per square kilometer. Asquith-Mount Colah's growth rate of 6.3% since the 2021 census exceeded both its SA3 area (4.1%) and SA4 region, positioning it as a growth leader in the region. Overseas migration contributed approximately 55.7% of overall population gains during recent periods.

AreaSearch uses ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered by this data, AreaSearch utilises NSW State Government's SA2 level projections released in 2022 with a base year of 2021. Growth rates by age group from these aggregations are applied to all areas for years 2032 to 2041. Looking ahead, the area is projected to experience above median population growth nationally, with an expected expansion of 3,124 persons to 2041 based on latest population numbers, representing a total increase of 12.6% over the 17-year period.

AreaSearch assessment of residential development activity positions Asquith - Mount Colah among the top 25% of areas assessed nationwide

Asquith - Mount Colah has recorded approximately 89 residential properties granted approval annually. Development approval data is produced by the ABS on a financial year basis. Over the past five financial years, between FY21 and FY25, around 448 homes have been approved, with an additional five approved so far in FY26. On average, about 4.9 people per year have moved to the area for each dwelling built over these five financial years.

This demand significantly outpaces supply, which typically puts upward pressure on prices and increases competition among buyers. New homes are being built at an average expected construction cost value of $428,000, under regional levels, indicating more accessible housing choices for buyers. Additionally, $36.3 million in commercial development approvals have been recorded this financial year, demonstrating high levels of local commercial activity. Compared to Greater Sydney, Asquith - Mount Colah has slightly more development, with 48.0% above the regional average per person over the five-year period. This balances buyer choice with support for current property values, though building activity has slowed in recent years.

New building activity shows 47.0% detached houses and 53.0% medium and high-density housing, offering affordable entry pathways and attracting downsizers, investors, and first-time purchasers. This represents a notable shift from the area's existing housing composition of 74.0% houses, indicating decreasing availability of developable sites and reflecting changing lifestyles and the need for more diverse, affordable housing options. The estimated count of 386 people in the area per dwelling approval reflects its quiet, low activity development environment. Population forecasts indicate Asquith - Mount Colah will gain approximately 2,950 residents through to 2041. Building activity is keeping pace with growth projections, though buyers may experience heightened competition as the population grows.

Asquith - Mount Colah has very high levels of nearby infrastructure activity, ranking in the top 10% nationally

Five projects are identified by AreaSearch as potentially impacting the area: M1 Pacific Motorway Northbound Capacity expansion from Wahroonga to Mount Colah, Westfield Hornsby's mixed-use redevelopment, Hornsby Town Centre Masterplan, and Hornsby Ku-ring-gai Hospital Redevelopment - Stage 2 & 2A.

Professional plan users can use the search below to filter and access additional projects.

AreaSearch assessment indicates Asquith - Mount Colah faces employment challenges relative to the majority of Australian markets

Asquith - Mount Colah has a highly educated workforce with notable representation in the technology sector. As of June 2025, its unemployment rate is 7.5%.

In this month, 12,479 residents are employed while the unemployment rate is 3.3% higher than Greater Sydney's rate of 4.2%. Workforce participation stands at 68.7%, above Greater Sydney's 60.0%. Employment is concentrated in health care & social assistance, professional & technical services, and education & training. The area specializes in education & training with an employment share 1.3 times the regional level.

Conversely, transport, postal & warehousing has lower representation at 3.4% compared to the regional average of 5.3%. Locally, limited employment opportunities are indicated by the count of Census working population versus resident population. Over the 12 months to June 2025, labour force levels decreased by 0.3%, alongside a 3.4% employment decline, raising the unemployment rate by 3.0 percentage points. In contrast, Greater Sydney experienced employment growth of 2.6% and labour force growth of 2.9%, with a 0.3 percentage point rise in unemployment. State-level data to Sep-25 shows NSW employment contracted by 0.41%, losing 19,270 jobs, with the state unemployment rate at 4.3%. Nationally, the unemployment rate is 4.5% and employment growth is 0.26%. Jobs and Skills Australia's national employment forecasts from May 2025 project a 6.6% increase over five years and 13.7% over ten years. Applying these projections to Asquith - Mount Colah's employment mix suggests local growth of approximately 7.2% over five years and 14.7% over ten years, though this is a simple extrapolation for illustrative purposes only.

Income metrics indicate excellent economic conditions, with the area achieving higher performance than 75% of national locations assessed by AreaSearch

AreaSearch released postcode level ATO data on June 30, 2022. Asquith - Mount Colah's median income among taxpayers was $59,048 with an average of $75,353. Nationally, this is high compared to Greater Sydney's median of $56,994 and average of $80,856. By March 2025, estimated incomes would be approximately $65,307 (median) and $83,340 (average), based on a 10.6% Wage Price Index growth since June 2022. Census 2021 data shows Asquith - Mount Colah's household, family, and personal incomes rank between the 80th and 90th percentiles nationally. Income analysis reveals that 31.9% of residents earn $1,500-$2,999 weekly (7,477 residents), mirroring the metropolitan region where 30.9% fall into this bracket. A substantial proportion, 40.1%, earn above $3,000 weekly, indicating strong economic capacity. High housing costs consume 15.7% of income, but strong earnings place disposable income at the 89th percentile nationally. The area's SEIFA income ranking places it in the 9th decile.

Asquith - Mount Colah is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership

Dwelling structure in Asquith - Mount Colah, as evaluated at the Census conducted on 29 August 2016, comprised 74.4% houses and 25.6% other dwellings (semi-detached, apartments, 'other' dwellings). This compares to Sydney metropolitan area's figures of 61.4% houses and 38.6% other dwellings. The level of home ownership in Asquith - Mount Colah was 31.7%, with the remainder of dwellings either mortgaged (47.4%) or rented (20.9%). The median monthly mortgage repayment in the area was $2,550, while the median weekly rent figure was recorded at $500. These figures compare to Sydney metropolitan area averages of $2,500 for mortgage repayments and $480 for rents. Nationally, Asquith - Mount Colah's mortgage repayments are significantly higher than the Australian average of $1,863, while rents are substantially above the national figure of $375.

Asquith - Mount Colah features high concentrations of family households, with a higher-than-average median household size

Family households account for 82.4% of all households, including 46.7% couples with children, 25.0% couples without children, and 9.8% single parent families. Non-family households constitute the remaining 17.6%, with lone person households at 15.9% and group households comprising 1.7%. The median household size is 2.9 people, larger than the Greater Sydney average of 2.7.

Educational achievement in Asquith - Mount Colah places it within the top 10% nationally, reflecting strong academic performance and high qualification levels across the community

The area has university qualification rates of 43.1%, significantly lower than the SA4 region average of 57.1%. This disparity presents both a challenge and an opportunity for targeted educational initiatives. Bachelor degrees are most common at 27.7%, followed by postgraduate qualifications (11.9%) and graduate diplomas (3.5%). Vocational credentials are prevalent, with 29.5% of residents aged 15+ holding them - advanced diplomas (12.2%) and certificates (17.3%).

Educational participation is high at 31.5%, including 10.5% in primary education, 8.6% in secondary education, and 5.8% pursuing tertiary education. A network of 8 schools operates within Asquith - Mount Colah, educating approximately 2,870 students. The area has above-average socio-educational conditions (ICSEA: 1090). The educational mix includes 5 primary, 2 secondary, and 1 K-12 school. School places per 100 residents (12.2) are below the regional average (16.1), with some students likely attending schools in adjacent areas. Note: where schools show 'n/a' for enrolments please refer to parent campus.

Transport servicing is good compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility

The analysis of public transport in Asquith - Mount Colah shows that there are 189 active transport stops operating. These include a mix of train and bus services. The area is served by 34 individual routes which collectively provide 2,475 weekly passenger trips.

Transport accessibility is rated as excellent with residents typically located 146 meters from the nearest stop. Service frequency averages 353 trips per day across all routes, equating to approximately 13 weekly trips per individual stop.

Asquith - Mount Colah's residents boast exceedingly positive health performance metrics with very low prevalence of common health conditions across all age groups

Health outcomes data shows exceptional results across Asquith - Mount Colah, with very low prevalence of common health conditions across all age groups. The rate of private health cover is high at approximately 57% of the total population (~13,385 people), compared to 60.8% across Greater Sydney.

Asthma and mental health issues are the most common medical conditions in the area, impacting 7.4 and 7.0% of residents respectively. A total of 73.5% of residents declare themselves completely clear of medical ailments, compared to 74.0% across Greater Sydney. The area has 15.6% of residents aged 65 and over (3,659 people), which is lower than the 17.1% in Greater Sydney. Health outcomes among seniors are particularly strong, broadly in line with the general population's health profile.

Asquith - Mount Colah is among the most culturally diverse areas in the country based on AreaSearch assessment of a range of language and cultural background related metrics

Asquith-Mount Colah has a high level of cultural diversity, with 30.1% of its population speaking a language other than English at home and 37.1% born overseas. Christianity is the predominant religion in Asquith-Mount Colah, accounting for 46.4% of the population. Notably, Judaism comprises 0.4% of the population, which is similar to the regional average of 0.4%.

The top three ancestry groups are English at 23.5%, Australian at 21.6%, and Other at 12.8%. There are also notable differences in the representation of certain ethnic groups: Korean is overrepresented at 1.3% compared to the regional average of 2.0%, Russian remains similar at 0.6%, and Chinese is underrepresented at 7.4% compared to the regional average of 11.6%.

Asquith - Mount Colah's population is slightly older than the national pattern

The median age in Asquith - Mount Colah is 39 years, which is higher than Greater Sydney's average of 37 years and close to the national average of 38 years. The 45-54 age cohort is over-represented at 15.9% locally compared to Greater Sydney's average, while the 25-34 age group is under-represented at 9.1%. According to post-2021 Census data, the 15-24 age group has increased from 12.0% to 13.3%, and the 45-54 cohort has risen from 14.8% to 15.9%. Conversely, the 25-34 age group has decreased from 10.9% to 9.1%. By 2041, population forecasts indicate significant demographic changes for Asquith - Mount Colah. The 55-64 age group is expected to grow by 29%, reaching 3,417 people from 2,646. Residents aged 65 and older will represent 58% of the anticipated growth population. Meanwhile, the 5-14 and 0-4 age cohorts are projected to experience population declines.