Seventeen Mile Rocks (Qld)

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In the suburb of Seventeen Mile Rocks, demographic analysis by Districts combining ABS releases with verified new address data indicates the population has reached approximately 3,108 as of May 2026. This represents an addition of 409 residents, or a 15.2% expansion, relative to the 2,699 citizens recorded during the 2021 Census. This calculated population of 3,108 is derived by Districts from the ABS Estimated Resident Population release in June 2025 alongside 19 validated new addresses established post-census. The local density stands at 1,473 persons per square kilometer, which exceeds typical national benchmarks. This 15.2% rate of expansion outpaced the broader SA3 region at 3.0% as well as the SA4 territory, positioning the suburb of Seventeen Mile Rocks as a regional frontrunner in population gains. The upward trend was largely underpinned by overseas arrivals, who accounted for roughly 54.0% of the overall demographic expansion in recent times.

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Seventeen Mile Rocks features a workforce with high levels of education, notable concentration in corporate services, and a low unemployment rate of 3.8% based on aggregated regional statistics. Working residents totaled 1,603 in March 2026, with the jobless rate tracking 0.5% below the Greater Brisbane figure of 4.3%. Labor participation is slightly low at 67.6% compared to 70.4% across the broader metro area. Census data indicated that 29.3% of the working population performed their duties from home, though this may have been influenced by pandemic-related restrictions.

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According to 2023 postcode-level ATO statistics compiled by Districts, the median taxpayer income in the area is $76,431, with an average of $100,595. These figures place the locality within the highest national bracket, compared to a median of $58,236 and an average of $72,799 in Greater Brisbane. Factoring in Wage Price Index growth of 11.36% since the 2023 financial year, current estimates point to a median of $85,114 and an average of $112,023 as of March 2026. Data from the 2021 Census indicates that household, family, and individual incomes are all elevated, placing between the 87th and 92nd percentiles nationwide. The income bracket of $1,500 - 2,999 accounts for 31.2% of the local population ( residents), which is in line with the recorded across the wider region. High earnings are common, with of households bringing in more than weekly, which bolsters local consumption. Disposable income remains high, with residents retaining of their earnings after housing expenses, and the SEIFA index ranks the community in the th decile.

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The local housing stock at the time of the census consisted of 92.9% separate houses and 7.1% alternative dwellings such as townhouses and flats, differing from the Brisbane metro split of 73.5% houses and 26.5% other options. Home ownership rates were high at 31.3%, with the remaining properties occupied by residents with a mortgage (49.2%) or renting (19.5%). Typical monthly mortgage payments were high at $2,156 compared to the Brisbane metro median of $1,863, while typical weekly rent was $425 compared to the metro figure of $380. On a national level, mortgage commitments exceed the Australian benchmark of $1,863, and rental costs are higher than the countrywide figure of $375.

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Families make up 82.4% of local households, consisting of couples with offspring at 46.3%, childless couples at 24.9%, and single-parent households at 11.0%. The remaining 17.6% consists of non-family living arrangements, with single occupants representing 15.3% and group housing accounting for 2.2%. The typical household size of 2.9 individuals is larger than the Greater Brisbane median of 2.6.

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Academic credentials in the area are high, with 45.2% of residents aged 15 and over holding a university degree, compared to 25.7% across Queensland and 30.4% nationwide. This provides a strong basis for professional employment. Bachelor qualifications are held by 28.5% of the population, postgraduate degrees by 12.2%, and graduate diplomas by 4.5%. Vocational training is also well represented, with 27.1% of residents aged 15 and over holding qualifications, comprising advanced diplomas at 12.2% and certificates at 14.9%.

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Analysis of the local network shows 9 public transport stops in operation, consisting of bus services. These stops accommodate 5 distinct routes, which support 344 weekly passenger journeys. Accessibility is favorable, with residents living an average of 265 meters from the nearest stop. Given the residential nature of the suburb, most workers commute out of the area, with private vehicles remaining the primary mode of travel at 83% and trains used by 12%. Household vehicle ownership stands at 1.7 cars, exceeding the metropolitan average. A significant 29.3% of the workforce worked from home according to the 2021 Census, which may have been influenced by pandemic measures.

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Evaluations of local health outcomes reveal strong results across the community, based on Districts analysis of mortality rates and chronic illnesses, with low rates of common conditions observed in both younger and older cohorts. Private health insurance coverage is high, with approximately 67% of the community (2,084 people) holding policies, compared to 55.8% in Greater Brisbane and a national benchmark of 55.7%.

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The local population displays greater cultural diversity than most areas, with 16.1% of residents speaking a non-English language at home and 27.1% born outside Australia. Christianity is the dominant faith, followed by 52.5% of the community. Judaism shows the most distinct divergence from regional norms, representing 0.3% of the local population compared to 0.1% across Greater Brisbane.

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The median age of 38 matches the national average, though it is slightly higher than the Greater Brisbane figure of 36. The 45 - 54 age bracket is highly represented at 16.6% of the population, while the 25 - 34 cohort is smaller at 8.6%. Since 2021, the 15 to 24 age group expanded from 11.0% to 14.1% and the 75 to 84 bracket grew from 3.4% to 5.3%. In contrast, the 5 to 14 cohort shrank from 17.6% to 15.5% and the 25 to 34 group decreased from 10.6% to . Projections to point to significant changes, with the to bracket expected to grow by (representing people), rising from to . This aging trend is prominent, with residents aged and over accounting for the entirety of projected demographic growth, while the to and to cohorts are expected to shrink.

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Seventeen Mile Rocks currently has an estimated 167 children under 5 years old, comprising approximately 78 children aged 0-2 and 53 children aged 3-4. This cohort grew by an estimated 9% since the previous census. though population forecasts indicate future decline, with an anticipated decrease of 23% by 2041 (to approximately 129 children). Meanwhile the 5-12 cohort currently amounts to 309. While growth has been positive birth rates observed in the area have been low, with approximately 7.0 births per 1,000 residents recorded over the latest two-year period analysed which ranks the area among the bottom 20% of areas assessed nationally. This rate has slowed down slightly in recent years however.