Marino - Seaview Downs
Statistical Area - sa2

An assessment of population growth drivers in Marino - Seaview Downs reveals an overall ranking slightly below national averages considering recent, and medium term trends

Marino - Seaview Downs' population is approximately 10,084 as of November 2025. This figure represents an increase of 381 people since the 2021 Census, which recorded a population of 9,703. The growth is inferred from ABS estimates: 10,077 in June 2024 and an additional 8 validated new addresses post-Census. The population density is around 825 persons per square kilometer. Marino - Seaview Downs' 3.9% growth since the Census is comparable to its SA4 region's 5.4%. Overseas migration contributed approximately 64.7% of recent 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, SA State Government's Regional/LGA projections by age category are adopted, adjusted using weighted aggregation methods. Future demographic trends suggest an increase just below the national median for statistical areas. Marino - Seaview Downs is projected to grow by 695 persons to 2041, a total gain of 6.8% over 17 years.

Recent residential development output has been above average within Marino - Seaview Downs when compared nationally

Seaview Downs has seen approximately 37 new homes approved each year over the past five financial years, totaling 185 homes. As of FY26, 31 approvals have been recorded. On average, 2.1 new residents per year have been associated with each dwelling since FY21-FY25, indicating strong demand that supports property values. The average construction cost value for new homes is $390,000, reflecting a focus on premium properties.

In FY26, $17.2 million in commercial development approvals have been recorded, suggesting balanced commercial development activity compared to Greater Adelaide. Marino - Seaview Downs shows around half the construction activity per person and ranks among the 61st percentile nationally when measured against other areas assessed. New development consists of 84.0% standalone homes and 16.0% attached dwellings, maintaining the area's traditional low-density character with a focus on family homes.

With approximately 245 people per approval, Marino - Seaview Downs reflects a low-density area. Population forecasts indicate an increase of 688 residents by 2041. Given current construction levels, housing supply should meet demand adequately, creating favorable conditions for buyers and potentially enabling growth that exceeds current forecasts.

Marino - Seaview Downs has emerging levels of nearby infrastructure activity, ranking in the 26thth percentile nationally

The performance of a region is significantly impacted by changes in local infrastructure, major projects, and planning initiatives. AreaSearch has identified eight projects that are expected to influence the area. Notable among these are Flagstaff Road Upgrade, Seaview Downs Primary School Redevelopment, Residential Development at 1 Greenfield Road, and Southern Suburbs Residential Policy Code Amendment. The following list outlines those projects likely to have the most significance.

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Employment conditions in Marino - Seaview Downs demonstrate exceptional strength compared to most Australian markets

Marino-Seaview Downs has an educated workforce with significant representation in essential services sectors. The unemployment rate is 2.5%, lower than Greater Adelaide's 4.0%.

Employment growth over the past year was estimated at 2.4%. As of June 2025, 5,528 residents are employed, with a local unemployment rate of 1.5% below Greater Adelaide's rate. Workforce participation is similar to Greater Adelaide at 64.4%. Key industries include health care & social assistance, construction, and education & training.

Construction employment share is high at 1.4 times the regional level, while manufacturing employs only 5.3% of local workers, lower than Greater Adelaide's 7.0%. Employment opportunities locally may be limited based on Census data comparison. Between June 2024 and June 2025, employment increased by 2.4%, labour force by 2.7%, raising the unemployment rate by 0.3 percentage points. In contrast, Greater Adelaide saw employment grow by 2.1% and unemployment rise marginally. Jobs and Skills Australia's national employment forecasts from May 2025 project a 6.9% increase over five years and 14.2% over ten years for Marino-Seaview Downs, based on industry-specific growth rates applied to the local employment mix.

The economic profile demonstrates above-average performance, with income metrics exceeding national benchmarks based on AreaSearch comparative assessment

AreaSearch's latest postcode level ATO data for financial year ending June 2022 shows that Marino - Seaview Downs has an above national average income. The median income is $54,064 and the average income is $69,304. This contrasts with Greater Adelaide's figures of a median income of $52,592 and an average income of $64,886. Based on Wage Price Index growth of 12.83% from July 2022 to September 2025, estimated incomes would be approximately $61,000 (median) and $78,196 (average). Census 2021 income data shows that Marino - Seaview Downs' household, family, and personal incomes cluster around the 56th percentile nationally. Distribution data reveals that the $1,500 - 2,999 bracket dominates with 33.2% of residents (3,347 people), similar to the surrounding region where this cohort represents 31.8%. After housing costs, 86.6% of income remains for other expenses. The area's SEIFA income ranking places it in the 7th decile.

Marino - Seaview Downs is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership

Dwelling structure in Marino - Seaview Downs, as per the latest Census, comprised 92.9% houses and 7.1% other dwellings. In comparison, Adelaide metro had 70.8% houses and 29.2% other dwellings. Home ownership in Marino - Seaview Downs stood at 40.4%, with mortgaged dwellings at 44.3% and rented ones at 15.3%. The median monthly mortgage repayment was $1,820, higher than Adelaide metro's average of $1,700. The median weekly rent in Marino - Seaview Downs was $375, compared to Adelaide metro's $330. Nationally, Marino - Seaview Downs' mortgage repayments were lower than the Australian average of $1,863, while rents were comparable at $375.

Marino - Seaview Downs has a typical household mix, with a higher-than-average median household size

Family households account for 75.3% of all households, including 33.9% couples with children, 30.3% couples without children, and 10.3% single parent families. Non-family households make up the remaining 24.7%, with lone person households at 21.8% and group households comprising 2.9%. The median household size is 2.6 people, which is larger than the Greater Adelaide average of 2.4.

The educational profile of Marino - Seaview Downs exceeds national averages, with above-average qualification levels and academic performance metrics

In Marino - Seaview Downs, 30.4% of residents aged 15+ possess university qualifications, exceeding the South Australian average of 25.7%. Bachelor degrees are most common at 20.4%, followed by postgraduate qualifications (7.1%) and graduate diplomas (2.9%). Vocational credentials are also prevalent, with 35.7% of residents aged 15+ holding such qualifications; advanced diplomas account for 11.7%, while certificates make up 24.0%.

Educational participation is high, with 27.7% of residents currently enrolled in formal education. This includes 9.6% in primary education, 7.2% in secondary education, and 5.7% pursuing tertiary education. Marino - Seaview Downs has three schools with a combined enrollment of 2,235 students, operating under typical Australian school conditions (ICSEA: 1049). The educational mix consists of one primary, one secondary, and one K-12 school. As an education hub, the area offers 22.2 school places per 100 residents, significantly higher than the regional average of 10.8, attracting students from surrounding communities.

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

Marino-Seaview Downs has 46 active public transport stops, served by 28 routes. These provide a total of 3,332 weekly passenger trips. The average distance to the nearest stop for residents is 250 meters.

There are 476 daily trips across all routes, equating to about 72 weekly trips per stop.

Marino - Seaview Downs's residents are healthier than average in comparison to broader Australia with a fairly standard level of common health conditions seen across both young and old age cohorts

Marino - Seaview Downs residents show positive health outcomes, with common conditions similar across age groups. Private health cover stands at approximately 54% (~5,485 people), compared to 50.9% in Greater Adelaide.

The most prevalent medical conditions are arthritis (8.0%) and asthma (7.7%). Overall, 69.7% report no medical ailments, slightly higher than Greater Adelaide's 68.1%. Residents aged 65 and over comprise 21.2%, or 2,134 people, compared to Greater Adelaide's 19.2%. Health outcomes among seniors are notably strong, outperforming the general population in health metrics.

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

Marino-Seaview Downs was found to have above-average cultural diversity, with 13.0% of its population speaking a language other than English at home and 25.6% born overseas. The predominant religion in Marino-Seaview Downs is Christianity, which constitutes 40.9% of the population there. However, the most significant overrepresentation is seen in the 'Other' category, comprising 1.3% of the population compared to 1.6% across Greater Adelaide.

In terms of ancestry, the top three groups in Marino-Seaview Downs are English at 31.7%, Australian at 24.5%, and Irish at 7.2%. Notably, Polish is overrepresented at 1.2% (compared to 1.1% regionally), German at 5.8% (vs 5.0%), and Welsh at 0.7% (vs 0.6%).

Marino - Seaview Downs hosts an older demographic, ranking in the top quartile nationwide

The median age in Marino - Seaview Downs is 43 years, which is significantly higher than Greater Adelaide's average of 39 years, and also older than Australia's median age of 38 years. Compared to Greater Adelaide, Marino - Seaview Downs has a higher proportion of residents aged 75-84 (8.4%), but fewer individuals aged 25-34 (9.8%). According to the 2021 Census, the population aged 15-24 increased from 11.0% to 12.7%, while the 75-84 age group rose from 7.1% to 8.4%. Conversely, the 65-74 cohort decreased from 11.8% to 10.4%. By 2041, demographic projections indicate significant shifts in Marino - Seaview Downs' age structure. The 85+ group is expected to grow by 116%, reaching 527 people from 244. Conversely, the 0-4 and 5-14 cohorts are projected to experience population declines.