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

As of May 2026, St Peters - Marden's population is approximately 14,517, marking a 7.4% increase from the 13,515 people reported in the 2021 Census. This growth is inferred from ABS' estimated resident population of 14,481 as of June 2025 and an additional 92 validated new addresses since the Census date. The population density stands at 2,427 persons per square kilometer, placing St Peters - Marden in the upper quartile nationally. The area's 7.4% growth since the census is comparable to the state's 7.5%, indicating strong growth fundamentals. Overseas migration accounted for approximately 93.5% of overall population gains during recent periods. AreaSearch uses ABS/Geoscience Australia projections released in 2024 with a base year of 2022 for each SA2 area.

For areas not covered by this data and years post-2032, the SA State Government's Regional/LGA projections by age category are adopted, based on 2021 data and released in 2023, with adjustments made using a method of weighted aggregation of population growth from LGA to SA2 levels. Looking ahead, demographic trends suggest a population increase just below the median of national areas. By 2041, St Peters - Marden is expected to expand by approximately 1,464 persons, reflecting a total gain of 9.8% over the 16-year period, based on the latest annual ERP population numbers.

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

St Peters - Marden saw approximately 54 new homes approved annually. Over the past five financial years, from FY21 to FY25, around 273 homes were approved, with an additional 49 approved so far in FY26. On average, about two people moved to the area per new home constructed during these years, indicating strong demand which supports property values.

New homes are being built at an average construction cost of $562,000, reflecting a focus on premium properties by developers. This financial year has seen $65.1 million in commercial approvals, suggesting robust commercial development activity. Compared to Greater Adelaide, St Peters - Marden has about two-thirds the rate of new dwelling approvals per person and ranks at the 44th percentile nationally for areas assessed, offering limited choices for buyers which supports demand for existing dwellings.

The current development mix consists of 60% detached houses and 40% attached dwellings, providing options across various price ranges. As an established area, it has approximately 380 people per dwelling approval. Future projections estimate St Peters - Marden to add around 1,428 residents by 2041, according to the latest AreaSearch quarterly estimate. Current development appears well-suited to meet future needs, supporting stable market conditions without excessive price pressure.

St Peters - Marden has emerging levels of nearby infrastructure activity, ranking in the 31stth percentile nationally

Changes to local infrastructure significantly impact an area's performance. AreaSearch has identified 13 projects likely affecting the region. Notable initiatives include Broad Street Reserve Playground Upgrade, East Park Development, Marden Connect Development, and Osmond Terrace Mixed-Use Development. The following list details those most pertinent.

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

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The exceptional employment performance in St Peters - Marden places it among Australia's strongest labour markets

St Peters - Marden has a highly educated workforce with professional services well represented. The unemployment rate was 2.3% in the past year, with an estimated employment growth of 5.4%. As of December 2025, 8,463 residents were employed, with an unemployment rate of 1.5% below Greater Adelaide's rate of 3.8%.

Workforce participation was 69.2%, compared to Greater Adelaide's 66.0%. 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 high specialization in professional & technical jobs, with an employment share 1.8 times the regional level.

Construction employed just 5.9% of local workers, below Greater Adelaide's 8.7%. Many residents commuted elsewhere for work based on Census data. During the year to December 2025, employment levels increased by 5.4%, and labour force grew by 5.3%, with unemployment remaining essentially unchanged. In contrast, Greater Adelaide saw employment rise by 4.2% and unemployment fall by 0.3 percentage points. Jobs and Skills Australia's national employment forecasts from May-25 project national employment growth of 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, though this is a simple weighting extrapolation for illustrative purposes and does not account for localised population projections.

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 ending June 2023 indicates that St Peters - Marden SA2 has a median income of $60,635 and an average income of $88,653. This is higher than Greater Adelaide's median income of $54,808 and average income of $66,852. Based on Wage Price Index growth of 10.17% since June 2023, estimates for March 2026 would be approximately $66,802 (median) and $97,669 (average). According to Census 2021 income data, personal income ranks at the 74th percentile ($954 weekly), with household income at the 57th percentile. The dominant income bracket is $1,500 - 2,999, comprising 28.0% of residents (4,064 people). Notably, 31.1% earn above $3,000 weekly. After housing costs, residents retain 86.7% of 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, consisted of 61.6% houses and 38.4% other dwellings (semi-detached, apartments, 'other' dwellings). This compares to Adelaide metro's 75.2% houses and 24.9% other dwellings. Home ownership in St Peters - Marden was 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 the area was $320, matching Adelaide metro's figure but lower than the national average of $375. Nationally, St Peters - Marden's median monthly mortgage repayments were significantly higher at $2,080 compared to Australia's 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% of all households, including 28.6% couples with children, 26.3% couples without children, and 7.8% single parent families. Non-family households make up the remaining 36.2%, with lone person households at 31.8% and group households comprising 4.5% 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

Education in St Peters - Marden shows notable achievement, with 48.6% of residents aged 15 and above holding university qualifications, compared to the state average of 25.7% and the Greater Adelaide average of 28.9%. This high level of educational attainment is marked by a significant proportion of Bachelor degrees (30.5%), followed by postgraduate qualifications (13.3%) and graduate diplomas (4.8%). Vocational pathways are also well-represented, with advanced diplomas accounting for 9.3% and certificates for 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

Public transport analysis shows 57 active transport stops operating within St Peters - Marden. These stops serve a mix of bus routes, totalling 29 individual routes. Collectively, they provide 2,669 weekly passenger trips. Transport accessibility is rated as good, with residents typically located 216 meters from the nearest transport stop. As a primarily residential area, most residents commute outward. Car remains the dominant mode of transport at 79%, with 10% using buses and 4% cycling.

Vehicle ownership averages 1.2 per dwelling, below the regional average. According to the 2021 Census, some 14.0% of residents work from home, which may reflect COVID-19 conditions. 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

St Peters - Marden's health outcomes show remarkable results based on AreaSearch's assessment. Mortality rates and chronic condition prevalence are low, especially among younger cohorts. Private health cover is exceptionally high at approximately 65% of the total population (9,465 people), compared to 52.7% across Greater Adelaide and a national average of 55.7%.

Mental health issues and arthritis were found to be the most common medical conditions in the area, impacting 7.7% and 7.3% of residents respectively. Notably, 71.3% of residents declared themselves completely clear of medical ailments, compared to 67.9% across Greater Adelaide. Working-age residents have low chronic condition prevalence. The area has 20.2% of residents aged 65 and over (2,926 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 its population. The most significant overrepresentation is seen in the 'Other' category, which makes up 1.5% compared to 1.8% across Greater Adelaide.

In terms of ancestry, the top three groups are English (24.7%), Australian (19.6%), and Italian (10.0%). Notably, Greek (3.2%) is overrepresented compared to the regional average of 2.0%, while German (5.1%) matches the regional figure exactly, and Polish (0.9%) is slightly underrepresented relative to Greater Adelaide's 1.0%.

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, and slightly older than Australia's average of 38 years. The 15-24 age group makes up 14.6% of the population in St Peters - Marden, compared to Greater Adelaide. The 5-14 age group is less prevalent at 9.4%. According to post-2021 Census data, the 15-24 age group has increased from 12.0% to 14.6%, while the 45-54 age group has decreased from 12.8% to 11.3%. The 5-14 age group has also dropped from 10.8% to 9.4%. Population forecasts for 2041 indicate significant demographic changes in St Peters - Marden, with the 85+ age group expected to grow by 86%, reaching 853 people from 458. The combined 65+ age groups will account for 56% of total population growth, reflecting the area's aging demographic profile. In contrast, the 5-14 age group shows minimal growth of just 1%, with an increase of 17 people.