IRSAD
Relative Socio-economic Advantage and Disadvantage
Score 1,052
Measures relative socio-economic advantage and disadvantage.
Within AustraliaDecile 9 of 10
Within South AustraliaDecile 9 of 10
For state-level context, explore the South Australia economy.
Housing
Millbrook
South Australia · Census 2021
Median house price not tracked for this suburb
Millbrook (SA) is a leafy residential suburb of Adelaide Hills.
Median house price
No Valuer-General median for Millbrook (SA).
South Australia's open Valuer-General suburb median feed covers metropolitan Adelaide only. We have no median for Millbrook (SA) from this feed. ABS median established-house price, Greater Adelaide: $980k; Rest of SA: $595k.
How it compares
Household income / wk18th percentile
<$450ABS Census 2021$3,749+
Percentiles rank this suburb against South Australia suburbs that carry the metric — never across states, and never against suburbs where it is missing. Price references are ABS median established-house transfer prices for the Mar 2026 quarter (CC BY 4.0); the suburb figure is a Valuer-General median over a different window, so read the gap as indicative. Income references are the Census 2021 median of the middle suburb in South Australia and nationally, not a household-weighted median.
People & housing
Population
133
Median age
50 yrs
Income / person / wk
$667
Household income / wk
$1,031
▼ 29% vs SA
Median rent / wk
$250
Mortgage / month
$2,492
Who lives here
- Couples with children
- 28%
- level with SA
- Living alone
- 32%
- +3 pts vs SA
- Unemployment
- 5%
- −1 pts vs SA
- In the labour force
- 55%
- −5 pts vs SA
- Bachelor degree or higher
- 18%
- −5 pts vs SA
- Earning $1–$499 a week
- 32%
- +5 pts vs SA
- Earning $2,000+ a week
- 13%
- +4 pts vs SA
Households for the family mix, residents aged 15+ for work, education and income; unemployment is a share of the labour force. SA figures weight each suburb by its dwellings or residents. ABS Census 2021 (CC BY 4.0). Withheld for very small populations — under 100 residents, or under 50 dwellings, households or workers for the shares that count those.
Housing stock
50 occupied private dwellings
- Separate house 60%
- Flat or apartment 0%
- Semi, terrace & other 40%
SA: 78% separate houses · 7% flats & apartments
- Owned outright 58%
- Mortgaged 22%
- Rented 16%
- Other & not stated 4%
SA: 32% owned outright · 36% mortgaged · 28% rented
ABS Census 2021 (CC BY 4.0). Withheld for very small populations — under 100 residents, or under 50 dwellings, households or workers for the shares that count those.
Socio-economic profile
IRSD
Relative Socio-economic Disadvantage
Score 1,070
Measures relative socio-economic disadvantage only; a higher score means less disadvantage.
Within AustraliaDecile 9 of 10
Within South AustraliaDecile 9 of 10
IER
Economic Resources
Score 1,080
Measures access to economic resources, including income, housing costs and assets.
Within AustraliaDecile 9 of 10
Within South AustraliaDecile 9 of 10
IEO
Education and Occupation
Score 1,019
Measures relative education and occupation characteristics.
Within AustraliaDecile 7 of 10
Within South AustraliaDecile 7 of 10
Scores are standardised across Australia to a mean of 1,000 and a standard deviation of 100. Deciles run from 1 (most disadvantaged) to 10 (least disadvantaged).
Source: ABS SEIFA 2021 (CC BY 4.0).
Terrain & hazard exposure
Median elevation
341 m
range 245–435 m
Land below 5 m
0%
0% below 2 m
Shares are the proportion of the suburb's land area; where part of a suburb is unmapped, only its mapped land counts, so the share is a floor. Land where Landsat saw water in at least 1% of clear passes since 1987, excluding permanent water and filtered by DEA's confidence layer. Satellites miss flood peaks, so this is a floor, not a risk estimate; dense high-rise cores can still register tower shadow as water. Not yet assessed: the Code applies its precautionary Evidence Required overlay to most of this suburb. Designated for development control; a designation, not a prediction of fire behaviour. Covers the Code's High, Medium, General and Urban Interface bushfire overlays. Land under its precautionary Regional and Outback overlays has not been assessed and is shown as no statutory layer. Elevation is orthometric height from a 30 m model; no hydrology or drainage is modelled.
Planning & zoning
In a heritage area
0%
conservation area / Heritage Overlay
Show on map →Listed heritage places
2
local & State places in the Code
Planning instrument: Planning and Design Code. Zones are grouped into ten families so states compare; the council's own scheme is the authority for any one lot. Listed-place counts follow each state's own list, so they do not compare across states. Source: SA Planning and Design Code zones; SA Code heritage & character overlays.
Culture & community
- Dominant religion
- No religion · 50%
- Top language at home
- English only
- No religion
- 50%
- Born overseas
- 17%
- English only at home
- 100%
Schools by sector
- Nearest secondary
- 7.5 km
School sector & type: ACARA (Australian Curriculum, Assessment and Reporting Authority), School Location dataset.
Local council
- Council (LGA)
- Adelaide Hills
- Population
- 42,875 (2025) · +1.0% in a year
- Area / density
- 795 km² · 54/km²
- Council medians (2021)
- age 44 · $2,067/wk household income · $350/wk rent
- Council-wide house median (2023-24)
- $990k
- Federal grants
- $2.12M in 2025-26 · $49/resident
- Website
- ahc.sa.gov.au
Council boundaries and the suburb split: ABS ASGS LGA 2024, allocated by 2021 mesh block and weighted by Census 2021 residents. Population: ABS Estimated Resident Population 2025. Medians: ABS Census 2021. House median: ABS Data by Region, established-house transfers across the whole council, financial year 2023-24. Federal grants: Financial Assistance Grants, Dept of Infrastructure. ABS and Dept of Infrastructure data CC BY 4.0; council website from Wikidata (CC0).
Representation
- Federal division
- Mayo
- Federal MP
- Rebekha Sharkie (XEN)
- Two-party-preferred
- Labor 55% 2PP
- State electorate
- Schubert
- State MP
- Ashton Hurn (LIB)
Similar suburbs
Closest demographic & amenity profile, nationally.
Sources: ABS ASGS boundaries (CC BY 4.0); ABS Census 2021 (CC BY 4.0); Australian Electoral Commission (CC BY 4.0); Geoscience Australia 1 Second DEM-S (CC BY 4.0); DEA Water Observations Statistics, Geoscience Australia (CC BY 4.0); Planning and Design Code overlays (Hazards — Flooding, and Flooding — General), Government of South Australia (CC BY 3.0 AU); Planning and Design Code overlays (Hazards — Bushfire), Government of South Australia (CC BY 3.0 AU); Planning and Design Code Zones, Government of South Australia (PlanSA) (CC BY 3.0 AU); Planning and Design Code Overlays (heritage and character), Government of South Australia (PlanSA) (CC BY 3.0 AU); Wikipedia state-member tables (CC BY-SA 4.0). Not financial advice.