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 Nov 2025. 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 77 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 8.7%. Population growth was primarily driven by overseas migration, contributing approximately 92.0% of overall population gains.

AreaSearch uses 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 employing a method of weighted aggregation of population growth from LGA to SA2 levels. Based on demographic trends, St Peters - Marden is expected to increase by 1,619 persons to 2041, reflecting an overall gain of 8.0% over the 17 years.

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 during these five years, indicating strong demand that supports property values.

New homes are being built at an average expected construction cost of $562,000, reflecting a focus on the premium segment with upmarket properties. This financial year has seen around $65.1 million in commercial approvals, suggesting robust 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 more limited choices for buyers and supporting demand for existing dwellings.

New development consists 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 status. Future projections estimate St Peters - Marden will add around 1,175 residents by 2041 (based on the latest 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

The performance of a region can greatly be influenced by changes in local infrastructure. AreaSearch has identified 14 projects that could potentially impact this area. Notable among these are Broad Street Reserve Playground Upgrade, East Park Development, Marden Connect Development, and Osmond Terrace Mixed-Use Development. The following list details those projects likely to have the most relevance.

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

St Peters - Marden has an educated workforce with strong professional services representation. Its unemployment rate was 2.4% in the past year. Employment grew by 3.0%.

As of September 2025, 8,321 residents are employed, with an unemployment rate of 1.5% below Greater Adelaide's rate of 3.9%. Workforce participation is 69.9%, compared to Greater Adelaide's 66.5%. Home-based workers comprise 14.0% of the workforce. Key industries include health care & social assistance, professional & technical services, and education & training.

The area specializes in professional & technical jobs, with an employment share 1.8 times the regional level. Construction employs just 5.9%, below Greater Adelaide's 8.7%. Many residents commute elsewhere for work. Between September 2024 and September 2025, employment levels increased by 3.0% while unemployment rose by 0.1 percentage points. National employment forecasts from May-25 project a 6.6% growth over five years and 13.7% over ten years. Applying these projections to St Peters - Marden's industry mix suggests local employment should increase by 7.2% over five years and 14.8% over ten years.

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 income nationally. The median income is $60,635 and the average income stands at $88,653. This contrasts with 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% since financial year 2023, current estimates for September 2025 would be approximately $65,971 (median) and $96,454 (average). Census 2021 income data shows personal income ranks at the 74th percentile ($954 weekly), while household income sits at the 57th percentile. Income brackets indicate that 28.0% of residents (4,109 people) fall within the $1,500 - 2,999 bracket, consistent with broader trends across the metropolitan region showing 31.8% in the same category. A significant 31.1% earn above $3,000 weekly. After housing costs, residents retain 86.7% of income, reflecting strong purchasing power and placing the area's SEIFA income ranking 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's dwelling structure, as per the latest Census, had 61.6% houses and 38.4% other dwellings (semi-detached, apartments, 'other' dwellings). This contrasts with Adelaide metro's 75.2% houses and 24.9% other dwellings. Home ownership in St Peters-Marden stood at 37.1%, with mortgaged dwellings at 30.0% and rented at 32.9%. The median monthly mortgage repayment was $2,080, higher than Adelaide metro's average of $1,562. Median weekly rent in St Peters-Marden was $320, aligning with Adelaide metro's figure but significantly lower than the national average of $375. Nationally, St Peters-Marden's mortgage repayments are notably 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 constitute 63.8 percent of all households, consisting of 28.6 percent couples with children, 26.3 percent couples without children, and 7.8 percent single parent families. Non-family households comprise the remaining 36.2 percent, with lone person households at 31.8 percent and group households making up 4.5 percent of the total. The median household size is 2.3 people, 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

St Peters - Marden's educational attainment exceeds broader standards significantly. Among residents aged 15+, 48.6% possess university qualifications, compared to South Australia's (SA) state average of 25.7% and Greater Adelaide's 28.9%. This notable advantage suggests strong potential for knowledge-based opportunities in the area. Bachelor degrees are most prevalent at 30.5%, followed by postgraduate qualifications at 13.3%, and graduate diplomas at 4.8%.

Vocational pathways account for 21.9% of qualifications among those aged 15+, 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% pursuing tertiary education, 8.4% primary education, and 7.2% secondary education.

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 St Peters - Marden reveals that there are 57 active transport stops currently operating. These stops service a mix of bus routes, with a total of 29 individual routes providing passenger trips. Each week, these routes collectively facilitate 2,669 passenger trips. The accessibility of transport in the area is rated as good, with residents typically located approximately 216 meters from the nearest transport stop. As a primarily residential area, most residents commute outward for work or other purposes. The dominant mode of transport remains cars at 79%, with bus usage at 10% and cycling at 4%.

On average, there are 1.2 vehicles per dwelling in the area, which is below the regional average. According to the 2021 Census, some 14.0% of residents work from home, a figure that may reflect the conditions related to COVID-19. The service frequency averages at 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 per AreaSearch's assessment. Mortality rates and chronic condition prevalence are very low, especially 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. A significant majority, 71.3%, 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 19.9% of residents aged 65 and over (2,923 people). While health outcomes among seniors are strong, they 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, accounting for 46.3% of the population. The category 'Other' comprises 1.5% of the population, slightly higher than the Greater Adelaide average of 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%) populations are overrepresented compared to regional averages of 2.0% and 5.1%, respectively. Polish population 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 average of 38 years. The 15-24 age group makes up 14.3% of the population, higher than Greater Adelaide's percentage. However, the 5-14 age group is less prevalent at 9.7%. According to post-2021 Census data, the 15-24 age group has grown from 12.0% to 14.3%, while the 45-54 cohort has declined from 12.8% to 11.3% and the 5-14 group has dropped from 10.8% to 9.7%. Population forecasts for 2041 indicate significant demographic changes in St Peters - Marden. The 85+ age group is expected to grow by 85%, reaching 865 people from 466. Notably, the combined 65+ age groups will account for 66% of total population growth, reflecting the area's aging demographic profile. In contrast, the 5-14 and 0-4 age groups are expected to experience population declines.