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 ABS population updates and AreaSearch validations, as of Nov 2025, South Plympton's estimated population is around 5,244. This reflects an increase of 523 people since the 2021 Census, which reported a population of 4,721. The change was inferred from AreaSearch's estimate of 4,921 residents in Jun 2024, based on latest ERP data release by ABS, and additional 81 validated new addresses since the Census date. This results in a density ratio of 3,340 persons per square kilometer, placing South Plympton in the upper quartile nationally according to AreaSearch assessments. The area's growth rate of 11.1% exceeded both SA4 region (7.3%) and state averages since the 2021 Census. Overseas migration contributed approximately 75.0% of overall population gains during recent periods.

Population projections for South Plympton are based on ABS/Geoscience Australia data released in 2024, using 2022 as the base year. For areas not covered and years post-2032, SA State Government's Regional/LGA projections by age category, released in 2023 with 2021 as base year, are adopted with adjustments made employing a method of weighted aggregation. Future population trends project an above median growth for the area, expecting it to grow by 872 persons to 2041 based on aggregated SA2-level projections, reflecting an increase of 11.0% over the 17 years.

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

AreaSearch analysis of ABS building approval numbers in South Plympton shows an average of around 32 new dwelling approvals annually over the past five financial years, totalling an estimated 163 homes. So far in FY2025-26, 12 approvals have been recorded. This averages out to approximately 1.6 new residents per year per dwelling constructed between FY2020-21 and FY2024-25, indicating a balanced supply and demand dynamic that supports stable market conditions. The average construction cost value of new homes is $326,000.

In the current financial year, there have been $2.2 million in commercial approvals, suggesting minimal commercial development activity. Compared to Greater Adelaide, South Plympton's new home approvals per capita are comparable, aligning with regional market stability trends. The dwelling mix comprises 61.0% detached dwellings and 39.0% medium and high-density housing, including townhouses and apartments, offering options across various price points.

With around 125 people per approval, South Plympton reflects a developing area. According to the latest AreaSearch quarterly estimate, South Plympton is projected to grow by 576 residents by 2041. At current development rates, new housing supply should comfortably meet demand, creating favourable conditions for buyers and potentially supporting population growth beyond current projections.

South Plympton 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 one major project likely affecting this region: Tram Grade Separation Projects, including Glenelg Line and River Torrens to Darlington Project (T2D) - South Road Resurfacing Works, plus Morphettville Racecourse Redevelopment.

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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 3.6% as of September 2025, based on AreaSearch aggregation of statistical area data.

Employment growth over the past year was estimated at 3.9%. As of September 2025, 2,869 residents were employed with an unemployment rate 0.3% lower than Greater Adelaide's rate of 3.9%. Workforce participation was 66.3%, compared to Greater Adelaide's 61.7%.

Key industries employing residents included health care & social assistance, education & training, and retail trade. Manufacturing employment was under-represented at 5.6% compared to Greater Adelaide's 7.0%. Employment opportunities locally may be limited as indicated by the Census working population vs resident population count. During the year to September 2025, employment levels increased by 3.9%, labour force by 3.5%, and unemployment rate fell by 0.3 percentage points in South Plympton. 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 rate. State-level data to 25-Nov-25 showed 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 suggest potential future demand within South Plympton. These projections indicate national employment will expand by 6.6% over five years and 13.7% over ten years, with varying growth rates between industry sectors. Applying these industry-specific projections to South Plympton's employment mix suggests local employment should increase by 6.9% over five years and 14.4% over ten years.

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

The median taxpayer income in South Plympton is $53,790, with an average of $62,126, according to the latest postcode level ATO data aggregated by AreaSearch for financial year 2023. This is lower than the national average, compared to Greater Adelaide's median income of $54,808 and average income of $66,852. By September 2025, estimates suggest a median income of approximately $58,524 and an average income of $67,593, based on Wage Price Index growth of 8.8% since financial year 2023. South Plympton's incomes rank modestly at the 38th to 50th percentiles for households, families, and individuals. Income distribution shows that 32.8% of the population (1,720 individuals) fall within the $1,500 - 2,999 income range, similar to the surrounding region's 31.8%. Housing affordability is severe, with only 83.7% of income remaining, ranking at the 39th percentile. The area's SEIFA income ranking places it in the 5th decile.

South Plympton displays a diverse mix of dwelling types, with above-average rates of outright home ownership

South Plympton's dwelling structure, as per the latest Census data, consisted of 60.9% houses and 39.2% other dwellings (semi-detached, apartments, 'other' dwellings). Adelaide metro had a higher proportion of houses at 70.8%, with 29.2% being other dwellings. Home ownership in South Plympton was 31.2%, similar to Adelaide metro's figure. Mortgaged dwellings constituted 36.8%, and rented dwellings made up 32.0%. The median monthly mortgage repayment in the area was $1,700, aligning with Adelaide metro's average. Weekly rent median was $340, slightly higher than Adelaide metro's $330. Nationally, South Plympton had lower mortgage repayments ($1,700 vs Australia's $1,863) and rents ($340 vs Australia's $375).

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

Family households comprise 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 account for 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 2.4.

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

South Plympton's residents aged 15+ have a higher proportion with university qualifications (36.1%) compared to South Australia state-wide (25.7%) and the SA4 region (28.1%). Bachelor degrees are most prevalent at 24.7%, followed by postgraduate qualifications (8.0%) and graduate diplomas (3.4%). Vocational credentials are also common, with 29.3% of residents holding such qualifications, including advanced diplomas (10.4%) and certificates (18.9%). Educational participation is high, with 27.1% currently enrolled in formal education, comprising 8.3% in primary, 7.4% in tertiary, and 5.1% in secondary education.

Educational participation is notably 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 20 operational public transport stops. These are served by buses from 24 different routes. Together, they facilitate 1,989 weekly passenger journeys.

Residents enjoy excellent transport accessibility, with an average distance of 171 metres to the nearest stop. Daily service frequency is 284 trips across all routes, resulting in around 99 weekly trips per individual stop.

The level of general health in South Plympton is notably higher than the national average with prevalence of common health conditions low among the general population though higher than the nation's average across older, at risk cohorts

South Plympton shows better-than-average health outcomes, with lower prevalence of common conditions among its general population compared to national averages, but higher among older, at-risk cohorts.

Approximately 52% (~2,704 people) have private health cover. The most prevalent medical conditions are arthritis and mental health issues, affecting 7.6 and 7.2% of residents respectively. 72.3% of residents report no medical ailments, compared to 68.1% in Greater Adelaide. 18.9% (991 people) are aged 65 and over, requiring more attention 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, accounting for 42.8% of the population. Hinduism, however, is more prevalent in South Plympton compared to Greater Adelaide, with 5.6% versus 4.1%.

The top three ancestry groups are English (22.3%), Australian (20.6%), and Other (11.0%). Notably, Hungarian (0.5%) and Greek (2.8%) populations are higher than the regional averages of 0.3% and 1.5%, respectively, while Polish is slightly lower at 1.0%.

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

The median age in South Plympton is 37, which is slightly lower than Greater Adelaide's average of 39 and close to the national average of 38. The 25-34 age cohort is notably higher at 18.3% locally compared to Greater Adelaide's average, while the 55-64 age group is under-represented at 9.6%. Post-2021 Census data shows the 75-84 age group has increased from 5.4% to 6.2%, and the 55-64 cohort has decreased from 10.8% to 9.6%. By 2041, population forecasts indicate significant demographic changes. The 85+ group is expected to grow by 82%, adding 150 people to reach 334 from 183. The 0-4 age group will grow by 5%, adding 13 residents.