Millswood (SA)

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According to evaluations of ABS demographics for the surrounding region alongside new addresses validated by Districts since the Census, the suburb of Millswood has an estimated residency of 2,210 as of May 2026. This represents a growth of 37 people (1.7%) relative to the 2021 Census, which registered 2,173 residents. This adjustment is calculated from the resident headcount of 2,210, determined by Districts through analysing the latest ABS ERP release (June 2025) and 1 verified new address post-Census. With these numbers, the population density stands at 2,166 persons per square kilometer, exceeding the typical ratio recorded across Australian regions analysed by Districts. The population expansion was almost entirely powered by arrivals from overseas, which represented approximately 99.0% of the overall gains during the recent timeframe.

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Millswood boasts a highly educated workforce with strong representation in professional services, an unemployment rate of just 2.1%, and 4.0% in estimated employment growth over the past year, based on Districts aggregation of statistical area data. As of March 2026, 1,220 residents are in work while the unemployment rate is 1.7% below Greater Adelaide's rate of 3.8%, and workforce participation is broadly similar to Greater Adelaide's 66.6%. Based on Census responses, a moderate 17.4% of residents were found to work from home, though Covid-19 lockdown impacts should be considered.

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The most recent postcode-level taxation statistics from the ATO for the 2023 financial year show that incomes in the suburb of Millswood are exceptionally high by national standards, with a median of $70,748 and an average of $103,303. This is significantly higher than the median of $54,808 and average of $66,852 recorded across Greater Adelaide. Adjusting for Wage Price Index growth of 10.17% since the 2023 financial year, current estimates would be roughly $77,943 for the median and $113,809 for the average as of March 2026. The 2021 Census confirms that household, family, and individual incomes in the suburb of Millswood are situated in the top tier, placing between the 89th and 95th percentiles nationally. The largest income group comprises 33.2% of residents (733 people) who earn + weekly, which contrasts with the broader region where the - range is most common at . This high concentration of top-tier earners, with receiving more than weekly, points to robust financial capacity. After accounting for housing expenditure, residents retain of their earnings, indicating strong purchasing power and placing the area in the th decile on the SEIFA index.

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Residential architecture in the suburb of Millswood at the time of the latest Census consisted of 89.6% separate houses and 10.4% alternative dwellings like semi-detached properties and apartments, compared to 75.2% houses and 24.9% other dwellings across metropolitan Adelaide. Home ownership rates in the suburb of Millswood were significantly higher than the metropolitan average at 50.8%, with the remaining properties being purchased with a mortgage (35.3%) or occupied by tenants (14.0%). The median monthly mortgage payment of $2,253 was well above the metropolitan average of $1,562, while the median weekly rent was $420 compared to the regional figure of $320. On a national level, mortgage repayments in the suburb of Millswood are much higher than the Australian median of $1,863, and rents also exceed the national median of $375.

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Families make up the vast majority of households at 77.6%, consisting of couples with children at 38.6%, couples without children at 30.5%, and single parent households at 8.0%. Non-family households represent the remaining 22.4%, which is mostly comprised of single-person households at 21.3% and group households at 1.4%. The median household size of 2.7 people is slightly larger than the Greater Adelaide average of 2.5.

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Educational attainment in the suburb of Millswood is highly advanced compared to regional averages, with 48.7% of residents aged 15+ holding a university degree, compared to 25.7% across South Australia and 28.9% in Greater Adelaide. This strong educational profile positions the community well for professional and knowledge-based roles. Bachelor degrees are the most common higher qualification at 30.6%, followed by postgraduate degrees at 12.2% and graduate diplomas at 5.9%. Vocational qualifications are held by 20.3% of the population aged 15+, consisting of advanced diplomas at 9.5% and certificates at 10.8%.

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Public transport data shows 7 active passenger stops within the suburb of Millswood, offering a combination of train and bus services. These stops support 12 distinct routes, which together accommodate 1,420 weekly passenger journeys. Accessibility is high, with residents living an average of 262 meters from their nearest stop. Being a residential community, most workers commute out of the suburb, with private cars remaining the primary travel mode at 76%, while 8% of residents cycle and 4% walk. Car ownership stands at an average of 1.7 vehicles per household, which is higher than the regional average. Census data from 2021 shows that 17.4% of residents work from home, which may be influenced by pandemic conditions.

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Health indicators show excellent results in the suburb of Millswood, based on evaluations of mortality rates and chronic illness levels, with very low rates of common illnesses across all demographics. Additionally, private health insurance uptake is exceptionally high, covering approximately 68% of the population (1,496 people). This compares to 52.7% across Greater Adelaide and a national average of 55.7%.

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The suburb of Millswood displays lower levels of cultural diversity than average, with 83.0% of residents born in Australia, 94.8% holding citizenship, and 89.7% speaking only English at home. The largest religious affiliation is Christianity, which is practiced by 49.3% of residents in the suburb of Millswood, compared to 42.4% across Greater Adelaide.

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The median age in the suburb of Millswood is 45 years, which is notably older than the Greater Adelaide average of 39 years and the national average of 38 years. The cohort aged 65 - 74 is highly represented at 12.6% compared to Greater Adelaide, while the 25 - 34 bracket is less common at 7.9%. Post-2021 Census figures show the 15 to 24 age bracket has risen from 13.7% to 15.1% of the population, and the 75 to 84 bracket increased from 7.4% to 8.8%. In contrast, the 45 to 54 cohort shrank from 14.9% to 13.6%. Demographic projections suggest the age profile in the suburb of Millswood will shift by . The to cohort is expected to grow the fastest at , adding residents to reach a total of . Older residents aged + will account for of the net population growth, highlighting local aging trends, while the to and to cohorts are projected to shrink.

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Millswood currently has an estimated 79 children under 5 years old, comprising approximately 55 children aged 0-2 and 36 children aged 3-4. This cohort declined by an estimated 4% since the previous census. though population forecasts indicate future growth, with an anticipated increase of 3% by 2041 (to approximately 81 children). Meanwhile the 5-12 cohort currently amounts to 180. Birth rates in the area have averaged 8.6 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.