St Agnes (SA)

An assessment of population growth drivers in St Agnes reveals an overall ranking slightly below national averages considering recent, and medium term trends

As of Nov 2025, the estimated population of the St Agnes (SA) statistical area (Lv2) is around 4,448, reflecting an increase of 215 people since the 2021 Census. This growth represents a 5.1% increase from the previously reported population of 4,233 in 2021. The change is inferred from AreaSearch's estimation of the resident population at 4,283 as of June 2024, along with validation of five new addresses since the Census date. This results in a population density ratio of 1,710 persons per square kilometer, higher than the average across national locations assessed by AreaSearch. Over the past decade, from 2015 to 2025, St Agnes has shown resilient growth patterns with an annual compound growth rate of 0.6%, outperforming its SA3 area. The primary driver of population growth in recent periods was overseas migration, contributing approximately 86.0% of overall population gains.

AreaSearch employs ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered by this data and years post-2032, the SA State Government's Regional/LGA projections are adopted, based on 2021 data and adjusted using weighted aggregation methods from LGA to SA2 levels. Looking ahead, the St Agnes (SA) area is expected to experience population growth of around 480 persons by 2041, reflecting a total increase of approximately 7.6% over the 17-year period based on aggregated SA2-level projections.

AreaSearch analysis of residential development drivers sees St Agnes recording a relatively average level of approval activity when compared to local markets analysed countrywide

St Agnes has averaged approximately 22 new dwelling approvals annually. Between FY-21 and FY-25, around 113 homes were approved, with an additional 11 approved in FY-26 to date. On average, 1.1 people have moved to the area for each dwelling built over these five financial years.

This suggests a balance between supply and demand, contributing to stable market dynamics. The average construction value of new dwellings is approximately $320,000. In FY-26, commercial approvals totalled $675,000, indicating a predominantly residential focus in the area.

Compared to Greater Adelaide, St Agnes has recorded 11.0% higher construction activity per person over the past five years. This maintains good buyer choice and supports existing property values. New development consists of approximately 87.0% detached houses and 13.0% townhouses or apartments, preserving the area's suburban nature and attracting space-seeking buyers. The population density is around 169 people per dwelling approval, indicating a low-density market. According to AreaSearch's latest quarterly estimate, St Agnes is projected to gain approximately 340 residents by 2041. Based on current development patterns, new housing supply should meet demand, providing good conditions for buyers and potentially facilitating population growth beyond current projections.

St Agnes has emerging levels of nearby infrastructure activity, ranking in the 29thth percentile nationally

Three projects identified by AreaSearch may impact the area: Grove Way and Golden Way Interchange Upgrade, Luminaire Estate Residential Development, Tea Tree Gully Sustainable Sewers Program, and Golden Grove Neighbourhood Code Amendment.

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

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The labour market strength in St Agnes positions it well ahead of most Australian regions

St Agnes has a skilled workforce with essential services sectors well represented. Its unemployment rate is 1.7%, with an estimated employment growth of 1.5% in the past year, according to AreaSearch's aggregation of statistical area data.

As of September 2025, 2,257 residents are employed while the unemployment rate is 2.2% lower than Greater Adelaide's rate of 3.9%. Workforce participation is similar to Greater Adelaide's 61.7%. Key industries of employment among residents are health care & social assistance, retail trade, and education & training.

Accommodation & food services have limited presence with 4.9% employment compared to the regional average of 6.8%. The area appears to offer limited local employment opportunities as indicated by the Census working population vs resident population count. During the year to September 2025, employment levels increased by 1.5% and labour force increased by 1.5%, with unemployment remaining essentially unchanged. In contrast, Greater Adelaide experienced employment growth of 3.0% and labour force growth of 2.9%, with a 0.1 percentage point drop in unemployment. State-level data to 25-Nov shows SA employment grew by 1.19% year-on-year, adding 10,710 jobs, with the state unemployment rate at 4.0%. This compares favourably to the national unemployment rate of 4.3%, with SA's employment growth outpacing the national average of 0.14%. Jobs and Skills Australia's national employment forecasts from May-25 offer insight into potential future demand within St Agnes. These projections suggest national employment should expand by 6.6% over five years and 13.7% over ten years, with growth rates differing significantly between industry sectors. Applying these industry-specific projections to St Agnes' employment mix suggests local employment should increase by 6.4% over five years and 13.4% over ten years.

Income levels sit below national averages according to AreaSearch assessment

AreaSearch's latest postcode level ATO data for financial year ending June 30, 2023 shows median income in St Agnes is $52,742 and average income is $59,222. This is lower than Greater Adelaide's figures of a median income of $54,808 and an average income of $66,852. Based on Wage Price Index growth of 8.8% from July 1, 2023 to September 2025, estimated incomes would be approximately $57,383 (median) and $64,434 (average). Census data indicates household, family, and personal incomes in St Agnes rank modestly, between the 38th and 38th percentiles. Income analysis reveals that 35.6% of residents earn between $1,500 to $2,999 weekly, which is similar to regional levels at 31.8%. Housing costs are manageable with 86.7% retained, but disposable income ranks below average at the 42nd percentile. St Agnes' SEIFA income ranking places it in the fifth decile.

St Agnes is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership

The dwelling structure in St Agnes, as per the latest Census, consisted of 85.8% houses and 14.3% other dwellings such as semi-detached homes, apartments, and 'other' dwellings. In comparison, Adelaide metro had 88.6% houses and 11.3% other dwellings. Home ownership in St Agnes stood at 39.9%, with the remaining dwellings being mortgaged (43.1%) or rented (17.0%). The median monthly mortgage repayment in St Agnes was $1,500, lower than Adelaide metro's average of $1,517. The median weekly rent figure in St Agnes was recorded at $340, compared to Adelaide metro's $330. Nationally, St Agnes's mortgage repayments were significantly lower than the Australian average of $1,863, while rents were less than the national figure of $375.

St Agnes has a typical household mix, with a lower-than-average median household size

Family households constitute 71.8% of all households, including 29.1% couples with children, 29.9% couples without children, and 11.8% single parent families. Non-family households comprise the remaining 28.2%, with lone person households at 26.6% and group households making up 2.1%. The median household size is 2.4 people, which is smaller than the Greater Adelaide average of 2.5.

Educational attainment in St Agnes aligns closely with national averages, showing typical qualification patterns and performance metrics

St Agnes has a lower proportion of university degree holders aged 15 and above compared to Australia, with 22.2% versus 30.4%. The most common qualification is the bachelor's degree at 15.7%, followed by postgraduate qualifications at 4.0% and graduate diplomas at 2.5%. Vocational credentials are also prevalent, with 37.0% of residents aged 15 and above holding such qualifications, including advanced diplomas (11.4%) and certificates (25.6%). A significant portion of the population, 24.3%, is actively engaged in formal education, with 9.8% in primary, 5.8% in secondary, and 4.0% in tertiary education.

A substantial 24.3% of the population actively pursues formal education. This includes 9.8% in primary education, 5.8% in secondary education, and 4.0% pursuing tertiary education.

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

Transport analysis in St Agnes shows 28 active public transport stops, all of which are bus stops. These stops are served by 14 different routes that together facilitate 1,143 weekly passenger trips. The accessibility of these services is rated as good, with residents on average being located 223 meters from the nearest stop.

On average, there are 163 trips per day across all routes, which equates to approximately 40 weekly trips per individual stop.

Health performance in St Agnes is well below average with a range of health conditions having marked impacts on both younger and older age cohorts

St Agnes faces significant health challenges, as indicated by its health data. Various health conditions affect both younger and older age cohorts substantially.

The rate of private health cover is relatively low at approximately 50% (~2,243 people), compared to the national average of 55.7%. Mental health issues and arthritis are the most common medical conditions in the area, impacting 10.0% and 9.9% of residents respectively. Only 61.3% of residents declared themselves completely clear of medical ailments, lower than the 66.3% across Greater Adelaide. The area has a higher proportion of residents aged 65 and over at 22.4% (996 people), compared to Greater Adelaide's 21.2%. Health outcomes among seniors present challenges broadly in line with the general population's health profile.

The level of cultural diversity witnessed in St Agnes was found to be slightly above average when compared nationally for a number of language and cultural background related metrics

St Agnes' population showed above-average cultural diversity, with 24.7% born overseas and 16.5% speaking a language other than English at home. Christianity was the dominant religion, comprising 45.1%. The 'Other' religious category had a slightly higher representation in St Agnes (1.9%) compared to Greater Adelaide (2.1%).

The top three parental ancestry groups were English (30.4%), Australian (24.6%), and Other (7.2%). Notably, German ancestry was overrepresented at 7.0% versus the regional average of 5.8%, Polish at 1.1% compared to 1.2%, and Welsh at 0.8% against a regional average of 0.7%.

St Agnes hosts a notably older demographic compared to the national average

The median age in St Agnes is 44 years, which exceeds Greater Adelaide's average of 39 years and is also above Australia's median age of 38 years. In comparison with Greater Adelaide's averages, the 55-64 age cohort is notably higher at 13.6% locally, while the 25-34 age group is lower at 11.9%. According to the 2021 Census, the population aged 35 to 44 has grown from 12.4% to 13.6%, while the 65 to 74 cohort has decreased from 11.9% to 10.6% and the 45 to 54 age group has dropped from 13.0% to 11.8%. Population forecasts for St Agnes in 2041 indicate significant demographic changes, with the 85+ age cohort projected to grow by 161 people (93%), from 173 to 335. The aging population trend is evident, with those aged 65 and above comprising 64% of the projected growth. Conversely, the 5 to 14 and 55 to 64 age cohorts are expected to experience population declines.