Median house price
—
No data available
SA · Alexandrina Council
Mount Observation, 5255
Est. population · Jun 2025
11
Growth (1 yr)
0.0%
Growth (5 yr)
+10.0%
Median age
39
Median income
$2,250/wk
Employment rate
83.3%
Languages at home
Mostly English at home
2021 Census · usual residence
Suburb profile
Mount Observation sits up in the Alexandrina Council hills, a smaller community where elevation and tree cover define the mood. Life revolves around the local community, with the wider region offering trips and services when needed. Families and commuters make up much of the community, with plenty of young families in the mix.
Shops and services are limited locally: a short trip to a nearby centre covers the fuller weekly shop. Open space is thinner than in many comparable suburbs, so residents often travel a little further for a longer park day. A car helps for most daily errands, with fewer amenities clustered within an easy walk.
Property prices are middling for the area: fair relative to what is nearby.
At a glance
Mount Observation snapshot
A quick read of housing, growth, livability, and risk
Median rent
—
No data available
Population (ERP)
11
0.0% annual growth
Dwelling vacancy
66.7%
Census unoccupied dwellings
How it compares
Relative standing using percentiles, ranks, and national deciles
Pop. growth
30th
percentile in SA
Advantage (IRSAD)
6/10
national SEIFA decile
Population growth
Recent ERP change over 1 and 5 years
Housing mix
Dwelling types from the 2021 Census
Risks & flags
Quick scan — open a section below for full context
Living here
Population
Estimated resident population
11(June 2025)
0.0% annual · +10.0% over 5 years · 30th percentile in SA
Growth figures & methodology
- Annual growth
- 0.0%
- 5-year growth
- +10.0%
- Change in 1 year
- 0
- Change in 5 years
- +1
- Growth rank in SA
- 30th percentile
ABS Estimated Resident Population allocated to this suburb from SA2-level data. Not an official ABS suburb count.
Methodology
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 (~0), extrapolated at +2.3% average annual growth since 2011. It is illustrative only — not an official ABS forecast.
2021 Census figures
2021 Census
- Population
- 10
- Median age
- 39
- Median household income / week
- $2,250
- Dwelling vacancy
- 66.7%
- Unoccupied private dwellings
- 4 of 6
- Median monthly mortgage
- $2,383
- Employment rate
- 83.3%
- Dwelling mix (houses / semi / flats)
- 3 / 0 / 0
Contributes to desirability score · Community (5%)
Employment, household income and age diversity (2021 Census)
Data sources & freshness
- 2021 Census — General Community Profile — Australian Bureau of Statistics · Updated
The 2026 Census runs in August 2026; suburb-level updates are expected from mid-2027.
- Estimated Resident Population — Australian Bureau of Statistics · 2025 · Updated · SA2 ERP allocated to suburb boundaries
Community & culture
No 2021 Census cultural diversity data for this suburb yet.
Data sources & freshness
- 2021 Census — General Community Profile — Australian Bureau of Statistics · Updated
The 2026 Census runs in August 2026; suburb-level updates are expected from mid-2027.
Family & Lifestyle
Amenities
No OpenStreetMap amenities mapped for this suburb yet.
Contributes to desirability score · Lifestyle (15%)
Food, shopping, recreation and sport (OpenStreetMap)
Data sources & freshness
- Local amenity insights — Suburb Guide (derived) · current · Updated
- OpenStreetMap amenities — OpenStreetMap contributors · current · Updated
Health access
- Nearest hospital
- Strathalbyn and District Health Service (16.2 km)
- Nearest hospital type
- Public Hospital
- Nearest hospital emergency
- Emergency department
Contributes to desirability score · Accessibility (15%)
Hospitals and GP clinics
Data sources & freshness
- Hospitals & GP Plus clinics (SA) — SA Health · current · Updated
Weather
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.
Summer (Dec–Feb)
- Usual max / min
- 29° / 14°
- Rainfall
- 67 mm · ~8 rainy days
Autumn (Mar–May)
- Usual max / min
- 23° / 10°
- Rainfall
- 97 mm · ~12 rainy days
Winter (Jun–Aug)
- Usual max / min
- 16° / 6°
- Rainfall
- 148 mm · ~18 rainy days
Spring (Sep–Nov)
- Usual max / min
- 22° / 9°
- Rainfall
- 119 mm · ~15 rainy days
Contributes to desirability score · Lifestyle (15%)
Temperature and humidity comfort
Data sources & freshness
- Seasonal climate normals — WorldClim 2.1 · Updated
Future & Planning
Planning & development
Development applications from PlanSA register (lodged 2020–2026) and EPA licensed activities.
4 planning-related records
2025· 1 proposal
December 2025
- Construct single storey dwelling, outbuilding (shed), 2x 64,000L water storage tanks and associated earthworksLOT 50 BRAESIDE RD MOUNT OBSERVATION SA 5255Under Assessment
2024· 1 proposal
June 2024
- Construction of single storey, split level dwelling with carport comprising shipping container, water storage tank, associated earthworks, retaining walls and roof mounted solar panels295D BRAESIDE RD MOUNT OBSERVATION SA 5255Decision Made
2021· 2 proposals
November 2021
- Construction of a Agricultural Building (Shed), 137000L Rain Water Tank and Associated EarthworksLOT 62 LAKEVIEW RD MOUNT OBSERVATION SA 5255Decision Made
- NEW RESIDENTIAL EARTH SHELTERED DWELLING WITH ATTACHED GARAGE & CARPORT1877A BULL CREEK RD MOUNT OBSERVATION SA 5255Decision Made
Contributes to desirability score · Future Growth (7%)
Development and planning activity
Data sources & freshness
- PlanSA development applications & EPA licences — Government of South Australia — PlanSA · 2020–2026 · Updated
Hazards
- Bushfire planning zone
- Overlay applies
Bushfire overlay checked at suburb centroid against all current SA Planning risk layers (high, medium, general, urban interface, regional, outback). Safer places from CFS designated locations.
Contributes to desirability score · Safety (18%)
Bushfire hazard overlays
Data sources & freshness
- Bushfire & hazard overlays (SA) — Government of South Australia · current · Updated
Politics & representation
- Federal electorate
- Mayo
- Member of Parliament
- Rebekha SHARKIE (Centre Alliance)
- Results from
- 2025 federal election
- Electorate enrolment (2025)
- 137,818
- Turnout (2025)
- 94.2%
- Swing since 2022 (2025)
- +3.4 pp toward Labor
Two-party preferred (2025)
Coalition 45.0%Labor 55.0%
Estimated suburb voting profile
Estimated from 8 nearby ordinary polling places (up to 18.7 km away).
Coalition 53.7%Labor 46.3%
8.7 percentage points more Coalition-leaning than the electorate
Estimated swing since 2022: -1.5 pp toward Coalition
Nearest polling places
- AshbourneLabor 43.1% · Coalition 56.9% TPP (2025)7.3 km away
- Currency CreekLabor 39.7% · Coalition 60.3% TPP (2025)11.4 km away
- Mount CompassLabor 46.7% · Coalition 53.3% TPP (2025)11.9 km away
- GoolwaLabor 52.9% · Coalition 47.1% TPP (2025)16.4 km away
- StrathalbynLabor 50.9% · Coalition 49.1% TPP (2025)16.9 km away
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
- Federal election results — Australian Electoral Commission · Updated · 2025 election with by-election overlays
Socio-economic
- IRSAD decile (2021)
- 6/10
- IRSD decile (2021)
- 7/10
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).
What do IRSAD and IRSD measure?
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 (5%)
Socio-economic advantage (IRSAD decile)
Data sources & freshness
- SEIFA 2021 (IRSAD / IRSD) — Australian Bureau of Statistics · Updated
More in Alexandrina Council
Other suburbs in the same local government area.