St Peters - Marden

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

St Peters - Marden's population is around 14,675 as of Feb 2026. This reflects an increase of 1,160 people since the 2021 Census, which reported a population of 13,515 people. The change is inferred from the estimated resident population of 14,231 from the ABS as of June 2024 and an additional 87 validated new addresses since the Census date. This level of population equates to a density ratio of 2,454 persons per square kilometer. St Peters - Marden's growth rate of 8.6% since the census positions it close to the state average of 9.0%. Population growth was primarily driven by overseas migration, contributing approximately 92.0% of overall population gains during recent periods.

AreaSearch adopts ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered and years post-2032, the SA State Government's Regional/LGA projections are adopted with adjustments made using weighted aggregation methods. Based on demographic trends, a population increase just below the median of national areas is expected by 2041, with an anticipated growth of 8.0% over the 17-year period.

Residential development activity is slightly higher than average within St Peters - Marden when compared nationally

St Peters-Marden has seen approximately 54 new homes approved annually. Over the past five financial years, from FY21 to FY25, around 273 homes were approved, with another 37 approved so far in FY26. On average, about two people move to the area per new home constructed each year over these five years, indicating steady demand that supports property values.

The average expected construction cost value of new homes is $562,000, suggesting a focus on premium properties by developers. This financial year has seen around $65.1 million in commercial approvals, showing strong commercial development momentum. Compared to Greater Adelaide, St Peters-Marden has about two-thirds the rate of new dwelling approvals per person and ranks among the 44th percentile nationally, offering limited choices for buyers and supporting demand for existing dwellings.

New developments consist of 60% detached houses and 40% attached dwellings, with an increasing mix of attached housing types catering to various price ranges. The area has approximately 380 people per dwelling approval, reflecting its established nature. By 2041, St Peters-Marden is projected to add around 1,175 residents (AreaSearch quarterly estimate). At current development rates, new housing supply should comfortably meet demand, providing favorable conditions for buyers and potentially supporting population growth beyond current projections.

St Peters - Marden has emerging levels of nearby infrastructure activity, ranking in the 30thth percentile nationally

Changes to local infrastructure significantly influence an area's performance. AreaSearch has identified 14 projects that may impact this area. Key projects include Broad Street Reserve Playground Upgrade, East Park Development, Marden Connect Development, and Osmond Terrace Mixed-Use Development. The following list details those likely to be most relevant.

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

Denotes AI-based impression for illustrative purposes only, not to be taken as definitive under any circumstances. Please follow links and conduct other investigations from the project's source for actual imagery. Developers and project owners wishing us to use original imagery please Contact Us and we will do so.

AreaSearch analysis reveals St Peters - Marden significantly outperforming the majority of regions assessed nationwide

St Peters - Marden has a highly educated workforce with strong representation in professional services. The unemployment rate was 2.4% as of September 2025. Employment growth over the past year was estimated at 3.0%.

As of that date, 8,321 residents were employed while the unemployment rate was 1.5% lower than Greater Adelaide's rate of 3.9%. Workforce participation was 69.7%, slightly higher than Greater Adelaide's 66.4%. According to Census responses, 14.0% of residents worked from home. Key industries for employment were health care & social assistance, professional & technical, and education & training.

The area had a particular specialization in professional & technical services with an employment share 1.8 times the regional level. Construction employed only 5.9% of local workers compared to Greater Adelaide's 8.7%. Many residents commuted elsewhere for work based on Census data. Between September 2024 and September 2025, employment levels increased by 3.0%, labour force grew by 3.2%, resulting in a slight rise in unemployment of 0.1 percentage points. In contrast, Greater Adelaide saw employment rise by 3.0%, labour force grow by 2.9%, and unemployment fall by 0.1 percentage points. National employment forecasts from Jobs and Skills Australia project national employment growth at 6.6% over five years and 13.7% over ten years. Applying these projections to St Peters - Marden's employment mix suggests local employment should increase by 7.2% over five years and 14.8% over ten years, although these are simple extrapolations for illustrative purposes only.

Income analysis reveals strong economic positioning, with the area outperforming 60% of locations assessed nationally by AreaSearch

AreaSearch's latest postcode level ATO data for financial year 2023 shows that St Peters - Marden SA2 has an extremely high national median income of $60,635 and an average income of $88,653. This contrasts with Greater Adelaide's median income of $54,808 and average income of $66,852. Based on Wage Price Index growth of 8.8% since financial year 2023, current estimates for St Peters - Marden SA2 would be approximately $65,971 (median) and $96,454 (average) as of September 2025. According to Census 2021 income data, personal income ranks at the 74th percentile ($954 weekly), with household income at the 57th percentile. Income brackets indicate that 28.0% of residents (4,109 people) fall into the $1,500 - $2,999 bracket, consistent with broader metropolitan trends showing 31.8% in the same category. Notably, 31.1% earn above $3,000 weekly. After housing costs, residents retain 86.7% of their income, reflecting strong purchasing power and the area's SEIFA income ranking places it in the 8th decile.

St Peters - Marden displays a diverse mix of dwelling types, with above-average rates of outright home ownership

St Peters - Marden dwelling structure, as per the latest Census, had 61.6% houses and 38.4% other dwellings (semi-detached, apartments, 'other' dwellings), compared to Adelaide metro's 75.2% houses and 24.9% other dwellings. Home ownership in St Peters - Marden was 37.1%, with mortgaged dwellings at 30.0% and rented ones at 32.9%. Median monthly mortgage repayment was $2,080, above Adelaide metro's average of $1,562. Median weekly rent in St Peters - Marden was $320, matching Adelaide metro's figure but below the national average of $375. Nationally, St Peters - Marden's mortgage repayments were significantly higher than the Australian average of $1,863.

St Peters - Marden features high concentrations of lone person households and group households, with a lower-than-average median household size

Family households account for 63.8 percent of all households, including 28.6 percent couples with children, 26.3 percent couples without children, and 7.8 percent single parent families. Non-family households constitute the remaining 36.2 percent, with lone person households at 31.8 percent and group households comprising 4.5 percent of the total. The median household size is 2.3 people, which is smaller than the Greater Adelaide average of 2.5.

St Peters - Marden shows strong educational performance, ranking in the upper quartile nationally when assessed across multiple qualification and achievement indicators

In St Peters - Marden, educational attainment notably exceeds broader standards. Among residents aged 15+, 48.6% possess university qualifications, surpassing South Australia's (SA) average of 25.7% and Greater Adelaide's 28.9%. University qualifications are led by Bachelor degrees at 30.5%, followed by postgraduate qualifications at 13.3% and graduate diplomas at 4.8%. Vocational pathways account for 21.9% of qualifications, with advanced diplomas at 9.3% and certificates at 12.6%.

Educational participation is notably high, with 29.2% of residents currently enrolled in formal education. This includes 9.1% in tertiary education, 8.4% in primary education, and 7.2% pursuing secondary education.

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

St Peters - Marden has 57 active public transport stops serving a mix of bus routes. These stops are served by 29 individual routes, providing a total of 2,669 weekly passenger trips. The area's transport accessibility is rated as good, with residents typically located 216 meters from the nearest stop. As of the 2021 Census, some 14% of residents work from home, which may reflect COVID-19 conditions. Most residents commute outward, primarily by car (79%), followed by bus (10%) and cycling (4%). The average vehicle ownership is 1.2 per dwelling, below the regional average.

Service frequency averages 381 trips per day across all routes, equating to approximately 46 weekly trips per individual stop.

St Peters - Marden's residents boast exceedingly positive health performance metrics with younger cohorts in particular seeing very low prevalence of common health conditions

Health outcomes data shows excellent results in St Peters - Marden, as assessed by AreaSearch. Mortality rates and chronic condition prevalence are very low among younger cohorts. Private health cover is exceptionally high at approximately 65% of the total population (9,568 people), compared to 52.7% across Greater Adelaide and a national average of 55.7%.

The most common medical conditions in the area are mental health issues and arthritis, affecting 7.7% and 7.3% of residents respectively. 71.3% of residents report being completely clear of medical ailments, compared to 67.9% across Greater Adelaide. Working-age residents have low chronic condition prevalence. The area has 20.3% of residents aged 65 and over (2,981 people). Health outcomes among seniors are strong but rank lower nationally than the broader population.

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

St Peters-Marden has a higher cultural diversity than most local markets, with 28.8% of its population born overseas and 24.0% speaking a language other than English at home. Christianity is the predominant religion in St Peters-Marden, comprising 46.3% of the population. The category 'Other' is slightly overrepresented compared to Greater Adelaide, making up 1.5% versus 1.8%.

The top three ancestry groups are English (24.7%), Australian (19.6%), and Italian (10.0%). Notably, Greek (3.2%) and German (5.1%) are also overrepresented compared to regional averages of 2.0% and 5.1%, respectively, while Polish is slightly underrepresented at 0.9%.

St Peters - Marden's population is slightly older than the national pattern

The median age in St Peters - Marden is 40 years, similar to Greater Adelaide's average of 39 years but somewhat older than Australia's median age of 38 years. The 15-24 age group makes up 14.4% of the population, higher than Greater Adelaide's percentage, while the 5-14 cohort constitutes 9.6%. According to data from the 2021 Census, the 15-24 age group has increased from 12.0% to 14.4%, and the 35-44 cohort has risen from 12.4% to 13.5%. Conversely, the 45-54 cohort has decreased from 12.8% to 11.2%, and the 5-14 group has fallen from 10.8% to 9.6%. Population forecasts for 2041 indicate significant demographic changes in St Peters - Marden. The 85+ age group is projected to grow by 82% (390 people), reaching 865 from a starting point of 474. Notably, the combined 65+ age groups are expected to account for 64% of total population growth, reflecting the area's aging demographic profile. In contrast, the 5-14 and 55-64 cohorts are anticipated to experience population declines.