Crystal Brook (SA)

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Analysis of ABS demographic updates for the wider region and address information confirmed by Districts post-Census indicates that the suburb of Crystal Brook (SA) has a population of approximately 1,599 as of May 2026. This represents an addition of 62 people (4.0%) relative to the 2021 Census, which recorded 1,537 people. This shift is calculated from a resident population of 1,596, projected by Districts using the June 2025 ABS ERP release alongside 33 validated new addresses registered after the Census. The current population translates to a density of 8.3 persons per square kilometer, ensuring resident spaces remain highly open. The 4.0% expansion rate in the suburb of Crystal Brook (SA) since the 2021 census outpaced the broader SA3 region (2.4%), positioning it as a local growth frontrunner. Interstate relocation served as the primary engine for this population increase, functioning as almost the exclusive source of demographic growth in recent times.

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Crystal Brook features a diverse labor pool that includes both skilled manual workers and office employees, with strong representation in sectors providing critical community services. According to Districts data from statistical areas, the local unemployment stands at 5.3% and the projected job growth for the previous year reaches 3.6%. As of March 2026, there are 663 employed residents, and the local joblessness figure sits 0.2% lower than the Regional SA benchmark of 5.5%. However, the proportion of the population actively participating in the labor market is notably lower at 52.3%, falling behind the Regional SA rate of 58.4%. Census data indicates that only 8.7% of residents engage in remote work, though this figure may reflect lingering effects from pandemic-related restrictions.

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Taxpayer statistics from the ATO for financial year 2023 indicate that local earnings fall below the national standard. The median taxpayer income is recorded at $47,687 and the average income is $57,910, contrasting with Regional SA averages of $48,920 and $58,933. Adjusted for Wage Price Index growth of 10.17% since financial year 2023, estimated figures for March 2026 would be near $52,537 for the median and $63,799 for the average. Census data places local household, family, and individual incomes between the 3rd and 7th national percentiles. Weekly income distributions show that the single largest cohort comprises 32.3% of taxpayers earning between $400 - 799 weekly (516 residents), differing from regional trends where the $1,500 - range is largest at . Having of the population earning under weekly points to financial difficulties for many households. Although housing costs are manageable with residents retaining of their earnings, total disposable income sits in the th percentile nationally.

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Census records show the local housing profile consists of 92.1% separate houses and 7.9% alternative housing types, such as townhouses, units, or other structures, compared to Regional SA averages of 88.5% separate houses and 11.5% alternative structures. Fully owned homes represent 46.0% of properties, which is significantly higher than the Regional SA average, with the remaining houses split between mortgaged properties at 31.5% and rental properties at 22.5%. The median monthly mortgage payment of $975 sits well below the Regional SA benchmark of $1,153, while the median weekly rent is $189 compared to the regional figure of $220. Locally, mortgage obligations are much lower than the Australian median of $1,863, and weekly rents are likewise well below the national median of $375.

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Family households represent the largest share at 65.1%, including 23.5% couples with children, 31.7% couples without children, and 9.1% single-parent households. Non-family living arrangements account for the remaining 34.9%, consisting of single-person households at 33.1% and group homes at 1.3%. The median household size is 2.3 individuals, matching the Regional SA average.

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Educational markers point to local challenges, with university attainment rates at 15.2%, substantially lower than the national average of 30.4%. Bachelor degrees account for 11.7% of credentials, followed by graduate diplomas at 1.9% and postgraduate degrees at 1.6%. Vocational and technical qualifications are highly prevalent, with 38.5% of residents aged 15+ holding trade credentials, including advanced diplomas at 10.1% and certificates at 28.4%.

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Mortality figures and chronic illness markers point to notable health difficulties, with common ailments observed across both older and younger cohorts, and private health coverage levels reaching roughly 50% of the population (~798 people), compared to a national average of 55.7%.

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Cultural diversity measures are below average, with 92.3% of residents born in Australia, 93.4% holding citizenship, and 97.7% speaking only English in their homes. Christianity is the dominant religion, practiced by 49.3% of the population, compared to 45.2% in Regional SA.

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The median age of 49 years is slightly higher than the Regional SA average of 47 and sits significantly above the national benchmark of 38. Compared to Regional SA, there is a higher proportion of residents in the 75 - 84 bracket (11.7%) and a smaller proportion in the 45 - 54 bracket (9.2%). The representation of the 75 - 84 cohort is much higher than the national figure of 6.1%. Since the 2021 Census, the 15 to 24 cohort expanded from 6.8% to 9.3% of the total population, and the 75 to 84 cohort rose from 10.0% to 11.7%. Conversely, the 0 to group contracted from to , and the to group fell from to . Demographics are projected to shift considerably by with the + cohort increasing by ( people) to reach residents, up from . Aging trends are prominent, with individuals aged + accounting for of all projected population increases. In contrast, both the to and to age groups are expected to contract.

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Crystal Brook currently has an estimated 65 children under 5 years old, comprising approximately 40 children aged 0-2 and 27 children aged 3-4. This cohort declined by an estimated 27% since the previous census. though population forecasts indicate future growth, with an anticipated increase of 5% by 2041 (to approximately 68 children). Meanwhile the 5-12 cohort currently amounts to 166. Birth rates in the area have averaged 6.6 per 1,000 residents over the latest two-year period, a low rate (among the bottom 20% of areas assessed nationally). This rate has slowed down slightly in recent years however.