SA · Adelaide Hills Council
Est. population · Jun 2025
144
Growth (1 yr)
+1.4%
Growth (5 yr)
+2.9%
Median age
50
Median income
$1,031/wk
Employment rate
53.8%
University qualified
17.5%
Work from home
9.5%
Languages at home
Mostly English at home
2021 Census · usual residence
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Suburb profile
Millbrook is a semi-rural locality near Adelaide, in Adelaide Hills Council. The Millbrook Reservoir is part of the surrounding geography.
Local amenities are a relative strength. Space is a strength, but car dependence is high. Employment rates sit below those of comparable places, with employment 14% below the peer median.
Millbrook is a better fit for people who value local amenities more than employment.
Generated from the official metrics on this page. It can omit nuance or contain errors — check the tables and source notes before relying on it.
Strengths and weaknesses
Semi-rural locality · compared with semi-rural and lifestyle localities in South Australia (227)
Who it suits
Housing, growth and risk
A quick read of housing, growth, livability, and risk
Median house price
—
No data available
Median rent (Census)
$250/wk
2021 Census median weekly rent
Population (ERP)
144
+1.4% annual growth
Dwelling vacancy
11.8%
Census unoccupied dwellings
Relative standing using percentiles, ranks, and national deciles
Crime rate
31st
percentile in state (higher = more crime)
Pop. growth
83rd
percentile in SA
Rented dwellings
17%
2021 Census tenure
Advantage (IRSAD)
9/10
national SEIFA decile
Recent ERP change over 1 and 5 years
Dwelling types from the 2021 Census
Quick scan — open a section below for full context
Estimated resident population
144(June 2025)
+1.4% annual · +2.9% over 5 years · 83th percentile in SA
ABS Estimated Resident Population allocated to this suburb from SA2-level data. Not an official ABS suburb count.
Figures are allocated from ABS Estimated Resident Population at Statistical Area Level 2 (SA2), using 2021 Census share within overlapping SA2 regions. Where Census data is unavailable, area overlap is used instead.
The dashed chart line is a simple growth-trend estimate to June 2030 (~150), extrapolated at +0.3% average annual growth since 2011. It is illustrative only — not an official ABS forecast.
2021 Census
Contributes to desirability score · Community (12%) · Accessibility (12%) · Future Growth (6%)
Employment, household income and owned-outright tenure (2021 Census) Work-from-home and public-transport commute shares (2021 Census) Five-year population change as a healthy-growth band, not a boom bonus
Data sources & freshness
The 2026 Census was conducted in August 2026; suburb-level updates are expected from mid-2027.
17.5% of adults have a university degree, compared with 22.6% across South Australia. 10.8% have a trade or vocational qualification.
Main field of the highest non-school qualification (2021 Census).
| Measure | Definition |
|---|---|
| University qualified | Bachelor degree or higher |
| Diploma qualified | Advanced Diploma / Diploma |
| Trade / vocational | Certificate III + IV |
| Year 12 | Year 12 as highest attainment |
| Below Year 12 | Year 11 / 10 / 9 or below |
People aged 15 years and over, 2021 Census. University, diploma and trade shares match ABS highest educational attainment (HEAP). Year 12 and below Year 12 are combined in the chart because the General Community Profile reports school-only attainment as a residual.
Contributes to desirability score · Community (12%)
University qualifications from the 2021 Census
Data sources & freshness
The 2026 Census was conducted in August 2026; suburb-level updates are expected from mid-2027.
88th percentile in SA · +7% vs Australia
86th percentile in SA · +2% vs Australia
72nd percentile in SA · +1% vs Australia
91st percentile in SA · +96% vs Australia
73rd percentile in SA · +15% vs Australia
Australian Taxation Office Taxation Statistics 2023–24, individuals Table 25. Figures describe taxpayers who live in postcode 5231 — not a suburb-level official statistic. Rental investment is the share of local taxpayers reporting rental income or loss, not the share of local properties owned by investors.
Percentiles rank this postcode among unique postcodes in SA, so suburbs that share a postcode are not counted twice. Dollar figures are compared with Australia-wide ATO medians from the same release. Median net rent is among taxpayers who reported the rent label and can be negative.
Data sources & freshness
17.1% born overseas
49.6%No religion
No religion is the most common response at 49.6%, while Christianity accounts for 34.6%.
| Measure | Suburb | State |
|---|---|---|
| No religion | 49.6% | 45.2% |
| Christianity | 34.6% | 40% |
| Other / not stated | 15.8% | 14.7% |
| Denomination | Suburb | State |
|---|---|---|
| Catholic | 15% | 15.5% |
| Uniting Church | 10.5% | 4.8% |
| Anglican | 7.5% | 7.2% |
2021 Census — languages spoken at home, birthplace, Indigenous status, and religious affiliation (usual residence). Religion is optional on the Census form.
Data sources & freshness
The 2026 Census was conducted in August 2026; suburb-level updates are expected from mid-2027.
Reported offences are unchanged compared with the previous period.
Contributes to desirability score · Safety (22%)
Crime rate, offences against the person, year-on-year trend and recorded road crash rates
Data sources & freshness
2 public transport stops in this suburb
Contributes to desirability score · Accessibility (12%)
Public transport stops per 1,000 residents and walkability
Data sources & freshness
4 mapped amenities
2 campgrounds
Names and addresses from OpenStreetMap. Unnamed venues show as their type (e.g. Cafe). Transport stops are summarised by type rather than listed individually. Campgrounds, beaches, wineries and local trails are included when they sit inside the suburb boundary.
Contributes to desirability score · Lifestyle (12%)
Food, shopping, recreation and sport per 1,000 residents (OpenStreetMap)
Data sources & freshness
Green cover is the share of this suburb's boundary overlapping OpenStreetMap parks, woodland and forest polygons — not a satellite tree-canopy product. Summer maximum is the WorldClim / Open-Meteo seasonal normal already collected for Weather.
Contributes to desirability score · Environment (12%)
Tree canopy first, then green-cover area and parks per 1,000
Data sources & freshness
GP clinic counts from OpenStreetMap. Bulk-billing figures only include clinics tagged in OSM (sparse and unofficial — not a Medicare list).
Contributes to desirability score · Accessibility (12%)
Hospitals, GPs and aged care
Data sources & freshness
Active NDIS participants allocated from NDIA Statistical Area Level 2 (SA2, ASGS 2016) counts to this suburb boundary. Not an official suburb-level NDIS figure · as at 31 March 2026.
For NDIS spend and service-demand exploration by SA2 or postcode, see the Care Sector Demand Map.
Data sources & freshness
Typical conditions by season for suburbs in the same ~44 km climate area. Rainfall totals are summed from monthly WorldClim layers; rainy-day counts are approximate.
Contributes to desirability score · Lifestyle (12%)
Temperature and humidity comfort
Data sources & freshness
Development applications from PlanSA register (lodged 2020–2026) and EPA licensed activities.
1 planning-related records
September 2024
Data sources & freshness
2 heritage places
Contributes to desirability score · Environment (12%)
Heritage listings as established streetscape
Data sources & freshness
Bushfire overlay checked at suburb centroid against all current SA Planning risk layers (high, medium, general, urban interface, regional, outback). Flood cover is the share of the suburb boundary overlapping current SA Planning flood overlays (flooding and evidence required). Safer places from CFS designated locations.
Contributes to desirability score · Safety (22%)
Bushfire and flood hazard overlays
Data sources & freshness
Two-party preferred (2025)
Estimated suburb voting profile
Estimated from 8 nearby ordinary polling places (up to 13.3 km away).
7.3 percentage points more Coalition-leaning than the electorate
Estimated swing since 2022: +0.3 pp toward Labor
Nearest polling places
Federal electorate from AEC federal division boundaries (2025 redistribution). Division-level results are official AEC figures from the latest general election, with by-election updates where applicable. The estimated suburb profile blends up to eight nearest ordinary polling booths in the same electorate using inverse-distance weighting from the suburb centroid — an approximation, not official AEC data. Nearest polling places are shown for reference.
Data sources & freshness
ABS Socio-Economic Indexes for Areas (SEIFA), 2021 release — the latest available, derived from the 2021 Census. Deciles rank suburbs nationally from 1 (lowest) to 10 (highest).
IRSAD — Index of Relative Socio-economic Advantage and Disadvantage. Combines indicators of advantage (e.g. high income, skilled occupations) and disadvantage. Higher decile = more advantaged relative to other Australian areas.
IRSD — Index of Relative Socio-economic Disadvantage. Focuses on disadvantage only (e.g. low income, unemployment, limited education). Higher decile = less disadvantage nationally.
A new SEIFA edition typically follows each census; the ABS has not announced a release date beyond 2021.
Contributes to desirability score · Community (12%)
Socio-economic advantage (IRSAD and IRSD deciles)
Data sources & freshness
Other suburbs in the same local government area.
Similar population and socio-economic profile in other parts of South Australia.