Seacombe Heights (SA)

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The suburb of Seacombe Heights has a residency count estimated at 1,579 as of May 2026, determined through examination of ABS demographic releases for the region alongside recent address data validated by Districts. Compared to the 1,549 residents documented in the 2021 Census, this represents a gain of 30 people (1.9%). This estimate aligns with the 1,573 inhabitants projected by Districts using the ABS June 2025 estimated resident population data and address adjustments made after the Census. This population level yields a density of 1,879 persons per square kilometer, exceeding the typical ratio found across locations analyzed nationwide by Districts. The primary driver of this growth was overseas migration, which accounted for approximately 65.0% of the overall population increases in recent times.

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A significant portion of the workforce in Seacombe Heights holds advanced credentials, with robust employment in core public service sectors, a jobless rate of only 0.8%, and an estimated job growth rate of 5.1% over the prior year, based on localized statistical data compiled by Districts. In March 2026, working residents numbered 915, while the local unemployment rate was 3.1% below the 3.8% recorded across Greater Adelaide. Furthermore, labor force participation is exceptionally high at 71.8%, compared to 66.6% across Greater Adelaide. Census records show a modest 11.8% of workers operating from home, though these figures may reflect pandemic-era lockdown conditions.

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Taxpayer income records from the ATO at the postcode level for fiscal year 2023 show a median of $52,206 and an average of $66,922 in the suburb of Seacombe Heights. These figures align closely with national benchmarks, while Greater Adelaide registered a median of $54,808 and an average of $66,852. Factoring in Wage Price Index growth of 10.17% since fiscal year 2023, current estimated figures stand at approximately $57,515 for the median and $73,728 for the average as of March 2026. Data from the 2021 Census places individual, family, and household incomes in Seacombe Heights near the 56th percentile nationally. Income distribution figures indicate that the largest cohort comprises 37.7% of residents (595 people) earning in the $1,500 - 2,999 range, which is comparable to the wider region where 31.8% of the population falls into the same bracket. After paying for housing, residents retain of their income for other living costs, and the suburb ranks in the th decile on the SEIFA index of relative income advantage.

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At the time of the most recent Census, the local housing stock consisted of 97.7% separate houses and 2.3% other formats such as townhouses and units, compared to 75.2% houses and 24.9% other dwellings across the broader Adelaide metropolitan area. The level of home ownership in Seacombe Heights was much higher than the metropolitan average, with 38.1% of properties owned outright, while the rest were mortgaged (49.0%) or rented (12.8%). The median mortgage payment of $1,850 per month sat well above the Adelaide metropolitan average of $1,562, and the median weekly rent of $380 was higher than the metropolitan benchmark of $320. Compared nationally, mortgage payments in Seacombe Heights are lower than the Australian average of $1,863, while weekly rents exceed the national average of $375.

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Families comprise the vast majority of households at 79.8%, with couples raising children making up 36.7%, couples without children at 32.5%, and single parents with children at 8.7%. The remaining 20.2% of households are non-family arrangements, consisting of single-person households at 18.0% and shared group homes at 3.1%. The average household size is 2.6 residents, which is slightly larger than the Greater Adelaide average of 2.5.

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Higher education rates in Seacombe Heights are strong, with 30.1% of residents aged 15+ holding a university degree, exceeding the South Australian state average of 25.7%. Among these qualifications, bachelor degrees are the most common at 21.0%, with postgraduate degrees at 6.9% and graduate diplomas at 2.2%. Vocational and technical education is also common, with 33.8% of the population aged 15+ holding a qualification in these fields, consisting of advanced diplomas at 10.2% and certificates at 23.6%.

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Public transport services in Seacombe Heights include 10 passenger stops served by bus routes. These stops are linked to 8 different routes, which together provide 444 passenger journeys each week. Local transit access is rated highly, with homes located an average of 269 meters from the nearest stop. Because this is a residential suburb, most workers travel out of the area for employment, and cars remain the primary transport method at 90%, with 6% utilizing train services. Households own an average of 1.7 vehicles, which is above the metropolitan average. A relatively low 11.8% of the workforce worked from home, according to 2021 Census data, which may reflect pandemic conditions.

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Health indicators in Seacombe Heights show favorable outcomes based on Districts assessments of mortality and chronic illness rates, with below-average rates of common medical conditions across both younger and older demographics. The rate of private health insurance coverage is slightly higher than the average SA2 region, encompassing approximately 53% of the population, which is around 843 people.

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Seacombe Heights displays a level of cultural diversity that exceeds most comparable markets, with 28.8% of the population born outside Australia and 19.7% speaking a non-English language at home. Christianity is the largest religious group, representing 37.6% of residents. The most notable statistical divergence is in the Other category, which represents 1.4% of the population, compared to 1.8% across Greater Adelaide.

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The median age of 40 in Seacombe Heights is close to the Greater Adelaide average of 39, and slightly older than the national median of 38. The 45 to 54 demographic is highly represented at 14.2% of the population compared to Greater Adelaide, while the 25 to 34 age bracket is less common at 11.8%. Since the 2021 Census, the proportion of residents aged 15 to 24 grew from 10.7% to 12.1%, and the 75 to 84 bracket increased from 7.6% to 8.7%, whereas the 65 to 74 group fell from 9.7% to 8.3%. Forecasts for 2041 point to shifts in the local age profile, with the cohort aged and older projected to grow by (representing people) to reach residents from an initial . Conversely, the to and to demographics are projected to shrink.

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Seacombe Heights currently has an estimated 94 children under 5 years old, comprising approximately 48 children aged 0-2 and 32 children aged 3-4. This cohort declined by an estimated 2% since the previous census. while population forecasts indicate future decline, with an anticipated decrease of 4% by 2041 (to approximately 90 children). Meanwhile the 5-12 cohort currently amounts to 153. Birth rates in the area have averaged 9.9 per 1,000 residents over the latest two-year period, a moderate rate (within the middle tier nationally). This rate has slowed down slightly in recent years however.