Tea Tree Gully (SA)

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According to evaluations of ABS population adjustments for the wider region, alongside updated addresses verified by Districts post-Census, the suburb of Tea Tree Gully has a projected population of approximately 3,804 as of May 2026. This represents a growth of 305 individuals (8.7%) relative to the 2021 Census, which documented a population of 3,499 individuals. The shift is calculated from a resident population of 3,791, calculated by Districts using the most recent ERP data from the ABS (June 2025) plus an extra 25 validated new addresses since the Census date. This population size corresponds to a density ratio of 799 persons per square kilometer, which aligns closely with the typical figures observed across locations analyzed by Districts. The 8.7% expansion in the suburb of Tea Tree Gully since the 2021 census outpaced the SA3 area (4.1%) as well as the state, positioning it as a leading growth locality in the region. Population expansion in the area was mostly fueled by overseas migration, which accounted for roughly of the total population gains in recent times.

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Tea Tree Gully possesses a qualified labor force with strong representation in key service industries, an unemployment rate of only 2.4%, and an estimated job growth of 2.0% over the previous year, according to aggregated statistical district data compiled by Districts. In March 2026, 2,020 local residents were employed, while the jobless rate was 1.4% lower than the Greater Adelaide level of 3.8%, and the participation rate was slightly below average (64.6% relative to 66.6% in Greater Adelaide). Census responses indicated that a modest 9.7% of residents worked from their homes, though this should be interpreted alongside the effects of Covid-19 lock-downs.

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According to the latest ATO statistics compiled by Districts for financial year 2023, the suburb of Tea Tree Gully has income levels that sit below the national average. Taxpayers in the suburb of Tea Tree Gully register a median income of $56,490 and an average income of $63,430, contrasting with Greater Adelaide metrics of $54,808 and $66,852 respectively. Factoring in Wage Price Index growth of 10.17% since financial year 2023, updated estimates point to roughly $62,235 (median) and $69,881 (average) as of March 2026. The 2021 Census records show that household, family, and individual incomes are all modest in the suburb of Tea Tree Gully, falling between the 41st and 49th percentiles. Looking at the spread of income, the $1,500 - 2,999 range is the most common, accounting for 31.7% of residents ( people), which matches the wider region where fall into this bracket. Housing costs are manageable, with residents keeping of their earnings, though disposable income is below average at the th percentile, and the local SEIFA income decile places the area in the th decile.

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Residential structures in the suburb of Tea Tree Gully at the time of the most recent Census consisted of 90.1% standalone houses and 9.9% alternative housing options (semi-detached properties, apartments, and other dwellings), compared to Adelaide metro where houses made up 75.2% and other dwellings accounted for 24.9%. Furthermore, the rate of outright home ownership in the suburb of Tea Tree Gully was significantly higher than the Adelaide metro figure, sitting at 41.2%, while the remaining properties were either held with a mortgage (44.4%) or rented (14.4%). The median monthly payment for mortgages in the area was higher than the Adelaide metro average at $1,600, whereas the median weekly rent stood at $325, compared to Adelaide metro figures of $1,562 and $320. Nationally, mortgage costs in the suburb of Tea Tree Gully are notably lower than the Australian average of $1,863, and rent prices are also substantially below the national average of $375.

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Family units constitute the majority of households at 74.7%, which includes 32.2% couples with offspring, 31.3% couples without offspring, and 10.4% single-parent households. Non-family living arrangements account for the remaining 25.3%, consisting of single-person households at 23.1% and group shared homes at 2.4% of the total. The median household occupancy of 2.5 residents is identical to the Greater Adelaide average.

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Educational qualifications in the suburb of Tea Tree Gully trail regional benchmarks, with 23.8% of residents aged 15+ holding university degrees compared to 30.4% in Australia. This gap highlights potential for educational development and skills enhancement. Bachelor degrees lead at 16.3%, followed by postgraduate qualifications (4.7%) and graduate diplomas (2.8%). Trade and technical skills feature prominently, with 38.1% of residents aged 15+ holding vocational credentials – advanced diplomas (11.1%) and certificates (27.0%).

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Public transit assessment shows 22 active transit stops in the suburb of Tea Tree Gully, consisting of bus services. These stops are connected by 8 distinct routes, which together provide 798 passenger trips each week. Transit accessibility is classified as outstanding, with residents living an average of 188 meters from the nearest stop. Due to the residential nature of the locality, the majority of commuters travel outwards, with private cars being the primary mode at 87% and buses at 10%. Household vehicle ownership averages 1.5 per home. A modest 9.7% of local workers work from home, according to the 2021 Census, which may reflect the influence of COVID-19 rules.

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Health metrics suggest generally positive outcomes for those living in the suburb of Tea Tree Gully. Districts' review of mortality rates and medical conditions indicates that outcomes are overall consistent with national baselines, with a quite low occurrence of widespread health issues in both youth and senior groups. The rate of private health insurance slightly trails the standard SA2 area, covering approximately 52% of the population (~1,981 people).

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The suburb of Tea Tree Gully exhibits below-average cultural diversity, with 79.1% of residents born in Australia, 92.1% holding citizenship, and 93.3% communicating solely in English at home. The main religious affiliation is Christianity, representing 45.6% of the population. The most prominent overrepresentation is in the Other category, which accounts for 1.3% of the community, compared to 1.8% across Greater Adelaide.

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The median age of 44 years in the suburb of Tea Tree Gully is notably higher than the Greater Adelaide average of 39 and also well above the national median of 38. Compared to the Greater Adelaide average, the 75 - 84 cohort is notably over-represented (9.4% locally), while 25 - 34 year-olds are under-represented (11.4%). Since the 2021 Census, the 35 to 44 age group has grown from 12.3% to 13.8% of the population, while the 75 to 84 cohort increased from 8.3% to 9.4%. Conversely, the 45 to 54 cohort has declined from 13.5% to 12.2% and the to group dropped from to . Population forecasts for indicate substantial demographic changes for Tea Tree Gully. The + age cohort is projected to grow significantly, expanding by people () from to . Meanwhile, the to cohort is projected to decline by people.

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Tea Tree Gully currently has an estimated 186 children under 5 years old, comprising approximately 112 children aged 0-2 and 76 children aged 3-4. This cohort grew by an estimated 9% since the previous census. while population forecasts indicate future growth, with an anticipated increase of 6% by 2041 (to approximately 198 children). Meanwhile the 5-12 cohort currently amounts to 341. While growth has been positive birth rates observed in the area have been moderate, with approximately 8.5 births per 1,000 residents recorded over the latest two-year period analysed which ranks the area within the middle tier nationally. This rate has slowed down slightly in recent years however.