Northgate (SA)

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According to the analysis of demographics done by Districts using ABS releases for the surrounding region and address checking after the Census, the suburb of Northgate (SA) has an estimated resident count of 3,118 in May 2026. This indicates a contraction of 66 people (2.1%) from the 2021 Census, which counted 3,184 residents. The figure is derived from the resident count of 3,112, calculated by Districts using the ABS ERP release from June 2025 alongside address verification following the Census. The density corresponds to 3,087 persons per square kilometer, which ranks in the top quartile of all Australian locations analyzed. The primary driver of growth in the area was overseas migration, representing approximately 71.0% of the total demographic gains during recent timeframes.

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Tax data from the ATO for financial year 2023, compiled by Districts, shows that income levels in Northgate are below the national average. Taxpayers in the suburb earn a median of $55,847 and an average of $63,050, compared to the Greater Adelaide figures of $54,808 and $66,852. Factoring in Wage Price Index growth of 10.17% since financial year 2023, current estimates for March 2026 stand at approximately $61,527 for the median and $69,462 for the average. In the 2021 Census, local household, family, and individual incomes fell around the 71st percentile nationally. The distribution shows 38.3% of the population (1,194 individuals) earning between $1,500 and $2,999, mirroring the wider regional pattern where fall into this bracket. Economic capacity is demonstrated by the of households with high weekly incomes above which supports local commercial spending. Residents retain of their earnings after housing expenses, indicating good disposable income, and the suburb sits in the th decile for the SEIFA income index.

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Data from the latest Census shows that the housing stock in Northgate consists of 89.2% detached houses and 10.8% other options such as townhouses and units, compared to Adelaide metro where houses make up 75.2% and other options comprise 24.9%. Home ownership rates in Northgate lag the metropolitan average at 30.0%, with the remaining properties occupied by residents with mortgages (46.8%) or tenants (23.2%). The median mortgage payment of $1,742 per month is substantially higher than the Adelaide metro benchmark of $1,562, while the median weekly rent of $395 also exceeds the metro figure of $320. Nationally, mortgage costs in Northgate are lower than the Australian median of $1,863, whereas rental costs exceed the national benchmark of $375.

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Families make up the vast majority of households at 84.4%, consisting of couples with children at 48.7%, couples without children at 25.4%, and single parents at 9.6%. Non-family households comprise the remaining 15.6%, which includes single-person households at 13.3% and group living situations at 2.1%. The median household occupancy of 3.0 people is larger than the Greater Adelaide median of 2.5.

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Attainment levels in Northgate are significantly higher than the broader region, with 36.8% of residents aged 15 and over holding a university degree, compared to 19.8% in the SA4 region and 25.7% across SA. This high concentration of tertiary education positions the community well for professional services and knowledge sector roles. Bachelor degrees are the most common at 24.4%, followed by postgraduate studies at 9.6% and graduate diplomas at 2.8%. Vocational education is also well represented, with 27.6% of residents aged 15 and over holding technical qualifications, split between advanced diplomas at 10.7% and certificates at 16.9%.

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Public transit networks include 12 stops operating inside Northgate, which are serviced by a combination of buses. These stops accommodate 7 distinct routes that deliver a total of 809 passenger journeys weekly. Accessibility is favorable, with the typical resident living 206 meters from the nearest stop. Due to the suburban character of the area, most workers travel out of the suburb, with private cars being the primary mode of travel at 89% and buses at 8%. Motor vehicle ownership stands at 1.7 cars per household, which is higher than the regional benchmark. A relatively low proportion of the workforce (11.8%) worked from home, based on 2021 Census data collected during pandemic conditions.

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The suburb displays favorable health outcomes overall according to Districts analysis of mortality rates and chronic illnesses. Although chronic condition rates are low within the broader population, they exceed national benchmarks among older, vulnerable demographics. The rate of private health insurance coverage is slightly below the SA2 average, sitting at approximately 52% of the population, which equates to about 1,619 people.

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The area displays high levels of multiculturalism, with 36.5% of the population born outside Australia and 38.2% speaking a non-English language at home. Christianity is the primary religious affiliation, accounting for 46.2% of the community. The most distinct variance is in the category of Other religions, which accounts for 4.6% of residents compared to 1.8% across Greater Adelaide.

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The median age in Northgate is 38, which is very close to the Greater Adelaide average of 39 and identical to the national average of 38. The 5 to 14 age group is highly represented at 15.5% of the local population, whereas the 25 to 34 age bracket is under-represented at 9.6%. Since 2021, the 35 to 44 age cohort has increased from 16.0% to 17.5% of the population, while the 25 to 34 bracket has fallen from 11.0% to 9.6%. Long-term projections suggest the demographic structure will change by 2041, with the 45 to 54 cohort expected to grow by 189 people (), rising from to .

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Northgate currently has an estimated 171 children under 5 years old, comprising approximately 109 children aged 0-2 and 72 children aged 3-4. This cohort declined by an estimated 9% since the previous census. though population forecasts indicate future growth, with an anticipated increase of 16% by 2041 (to approximately 199 children). Meanwhile the 5-12 cohort currently amounts to 273. Birth rates in the area have averaged 12.7 per 1,000 residents over the latest two-year period, a high rate (among the top 30% of areas assessed nationally).