South Plympton

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

Based on analysis of ABS population updates for the broader area, and new addresses validated by AreaSearch as of May 2026, the suburb of South Plympton's estimated population is around 4,879. This reflects an increase of 158 people (3.3%) since the 2021 Census, which reported a population of 4,721 people. The change is inferred from the resident population of 4,861, estimated by AreaSearch following examination of the latest ERP data release by the ABS in June 2025 and an additional 86 validated new addresses since the Census date. This level of population equates to a density ratio of 3,107 persons per square kilometer, placing it in the upper quartile relative to national locations assessed by AreaSearch. Over the past decade ending in 2021, South Plympton has demonstrated resilient growth patterns with a compound annual growth rate of 1.4%, outpacing the SA3 area. Population growth for the suburb was primarily driven by overseas migration that contributed approximately 75.0% of overall population gains during recent periods.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, as released in 2024 with 2022 as the base year. For any SA2 areas not covered by this data, and for years post-2032, the SA State Government's Regional/LGA projections by age category, released in 2023 and based on 2021 data, are adopted with adjustments made employing a method of weighted aggregation of population growth from LGA to SA2 levels. As we examine future population trends, an above median population growth of statistical areas analysed by AreaSearch is projected for South Plympton, with the suburb expected to grow by 816 persons to 2041 based on aggregated SA2-level projections, reflecting a total increase of 16.4% over the 16 years.

Recent residential development output has been above average within South Plympton when compared nationally

Based on AreaSearch analysis of ABS building approval numbers allocated from statistical area data, South Plympton has averaged around 32 new dwelling approvals annually over the past five financial years. This totals an estimated 163 homes. In FY-26 so far, 20 approvals have been recorded. Each dwelling has supported an average of 2 new residents per year over the past five financial years (FY-21 to FY-25), reflecting robust demand that underpins property values.

New homes are being built at an average expected construction cost value of $326,000. There have also been $2.2 million in commercial approvals this financial year, indicating minimal commercial development activity. Relative to Greater Adelaide, South Plympton shows comparable new home approvals per person, supporting market stability in line with regional patterns.

New building activity comprises 61.0% detached dwellings and 39.0% medium and high-density housing, offering options across different price points from family homes to more affordable compact living. South Plympton reflects a low density area with around 126 people per approval. Looking ahead, AreaSearch's latest quarterly estimate projects South Plympton to grow by 798 residents through to 2041. Current development appears well-matched to future needs, supporting steady market conditions without extreme price pressure.

South Plympton has emerging levels of nearby infrastructure activity, ranking in the 27thth percentile nationally

The performance of an area can significantly influenced by changes in local infrastructure, major projects, and planning initiatives. One project has been identified by AreaSearch as potentially impacting this area: Tram Grade Separation Projects, Glenelg Line; River Torrens to Darlington Project (T2D) - South Road Resurfacing Works; Morphettville Racecourse Redevelopment. These are the key projects likely to have the most relevance.

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Employment performance in South Plympton exceeds national averages across key labour market indicators

South Plympton has a well-educated workforce with significant representation in essential services sectors. The unemployment rate was 3.5% as of December 2025, based on AreaSearch aggregation of statistical area data. This rate is 0.3% lower than Greater Adelaide's rate of 3.8%.

Workforce participation stood at 70.3%, slightly higher than Greater Adelaide's 66.0%. According to Census responses, a low 11.1% of residents worked from home. Key industries of employment among residents were health care & social assistance, education & training, and retail trade.

Manufacturing was under-represented with only 5.6% of South Plympton's workforce compared to 7.0% in Greater Adelaide. Employment levels increased by 4.6% during the year to December 2025, while labour force grew by 3.8%, leading to a decrease in unemployment rate by 0.7 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 South Plympton's employment mix suggests local employment should increase by 6.9% over five years and 14.4% over ten years, though this is a simple weighting extrapolation for illustrative purposes and does not account for localised population projections.

The area's income profile falls below national averages based on AreaSearch analysis

The suburb of South Plympton had a median taxpayer income of $53,790 and an average of $62,126 in the financial year 2023, according to postcode level ATO data aggregated by AreaSearch. This was lower than the national average, with Greater Adelaide's median income being $54,808 and average income $66,852. By March 2026, estimated incomes would be approximately $59,260 (median) and $68,444 (average), based on a 10.17% Wage Price Index growth since financial year 2023. In South Plympton, household, family, and personal incomes ranked modestly, between the 38th and 50th percentiles. Income distribution showed that 32.8% of the population (1,600 individuals) fell within the $1,500 - $2,999 range, similar to the surrounding region's 31.8%. Housing affordability was severe, with only 83.7% of income remaining, ranking at the 39th percentile. The area's SEIFA income ranking placed it in the 5th decile.

South Plympton displays a diverse mix of dwelling types, with a higher proportion of rental properties than the broader region

South Plympton's dwelling structures, as per the latest Census, consisted of 60.9% houses and 39.2% other dwellings (semi-detached, apartments, 'other' dwellings). This contrasts with Adelaide metro's figures of 75.2% houses and 24.9% other dwellings. Home ownership in South Plympton was 31.2%, similar to Adelaide metro, with mortgaged properties at 36.8% and rented ones at 32.0%. The median monthly mortgage repayment in the area was $1,700, higher than Adelaide metro's average of $1,562. Median weekly rent in South Plympton was $340, compared to Adelaide metro's $320. Nationally, South Plympton's mortgage repayments were lower than the Australian average of $1,863, and rents were less than the national figure of $375.

South Plympton features high concentrations of group households and lone person households, with a lower-than-average median household size

Family households account for 61.8% of all households, including 26.4% couples with children, 24.2% couples without children, and 9.6% single parent families. Non-family households constitute the remaining 38.2%, with lone person households at 32.6% and group households comprising 5.7%. The median household size is 2.3 people, which is smaller than the Greater Adelaide average of 2.5.

The educational profile of South Plympton exceeds national averages, with above-average qualification levels and academic performance metrics

South Plympton's educational attainment is notably higher than broader benchmarks. Among residents aged 15 and above, 36.1% possess university qualifications, compared to 25.7% in South Australia (SA) and 28.1% in the SA4 region. Bachelor degrees are most prevalent at 24.7%, followed by postgraduate qualifications at 8.0% and graduate diplomas at 3.4%. Vocational credentials are also prominent, with 29.3% of residents holding such qualifications - advanced diplomas at 10.4% and certificates at 18.9%.

Educational participation is high, with 27.1% of residents currently enrolled in formal education. This includes 8.3% in primary education, 7.4% in tertiary education, and 5.1% pursuing secondary education.

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

South Plympton has 22 active public transport stops offering a mix of light rail and bus services. These are served by 24 individual routes, collectively facilitating 1,989 weekly passenger trips. Transport accessibility is rated excellent with residents typically located 171 meters from the nearest stop. Most residents commute outward, primarily using cars (81%), followed by buses (7%) and cycling (2%). The average vehicle ownership per dwelling is 1.2, below the regional average. According to the 2021 Census, a relatively low 11.1% of residents work from home, which may reflect COVID-19 conditions.

Service frequency averages 284 trips per day across all routes, equating to approximately 90 weekly trips per individual stop.

South Plympton's residents are healthier than average in comparison to broader Australia with prevalence of common health conditions quite low among the general population though higher than the nation's average across older, at risk cohorts

Health data shows South Plympton residents have relatively positive health outcomes, aligning with national benchmarks for mortality rates and health conditions.

Common health conditions are low among the general population but higher in older, at-risk cohorts compared to national averages. Approximately 52% (~2,516 people) of the total population has private health cover. The most prevalent medical conditions are arthritis (7.6%) and mental health issues (7.2%). A majority (72.3%) report being completely clear of medical ailments, compared to 67.9% in Greater Adelaide. Working-age residents have low chronic condition prevalence. As of [date], 20.1% (~980 people) are aged 65 and over, ranking lower nationally than the broader population.

South Plympton was found to be more culturally diverse than the vast majority of local markets in Australia, upon assessment of a range of language and cultural background related metrics

South Plympton has a high level of cultural diversity, with 33.3% of its population born overseas and 31.2% speaking a language other than English at home. Christianity is the predominant religion in South Plympton, comprising 42.8% of its population. Hinduism is overrepresented compared to Greater Adelaide, making up 5.6% of South Plympton's population versus 2.8%.

The top three ancestral groups are English (22.3%), Australian (20.6%), and Other (11.0%). Hungarian, Polish, and Greek ethnicities show notable divergences in representation compared to regional averages: Hungarian is at 0.5% (vs 0.3%), Polish is at 1.0% (vs 1.0%), and Greek is at 2.8% (vs 2.0%).

South Plympton's population is slightly younger than the national pattern

The median age in South Plympton is 37 years, which is lower than Greater Adelaide's average of 39 years and close to the national average of 38 years. Locally, those aged 25-34 are notably over-represented at 18.3%, while those aged 55-64 are under-represented at 9.3%. Post-2021 Census data shows the 35 to 44 age group has grown from 14.1% to 15.4%, and the 75 to 84 cohort increased from 5.4% to 6.6%. Conversely, the 55 to 64 cohort has declined from 10.8% to 9.3%. Population forecasts for 2041 indicate significant demographic changes in South Plympton. The 45 to 54 age group is projected to grow by 32%, adding 174 people, reaching 726 from 551. The 0 to 4 age group will see more modest growth of 7%, with an increase of 17 residents.