SA · Onkaparinga Council
Est. population · Jun 2025
1,952
Growth (1 yr)
+0.5%
Growth (5 yr)
+6.6%
Median age
44
Median income
$1,072/wk
Employment rate
47.4%
University qualified
9.8%
Work from home
7.9%
Median house price · Q1 2026
$780,000
Languages at home
4.9%non-English
Most common: Afrikaans, Australian Indigenous languages, German
2021 Census · usual residence
Desirability score
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Suburb profile
O'Sullivan Beach is a coastal outer metropolitan suburb of Adelaide, in Onkaparinga Council. It is close to the O'Sullivan Beach.
Open-space access is exceptionally strong, placing it among the highest-ranked outer metropolitan suburbs. Rents sit a little below those in comparable places. Green cover is an exceptional strength, and recorded road-crash rates are lower than in comparable places, with recorded road crashes 59% below the peer median. The clearer weaknesses are lower socio-economic advantage and more mapped flood cover.
Overall, the suburb suits people prioritising open space and lower rents over socio-economic advantage.
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
Outer metropolitan suburb · compared with outer metropolitan suburbs in South Australia (64)
Who it suits
Housing, growth and risk
A quick read of housing, growth, livability, and risk
Median house price
$780k
+9.7% change
Median rent
$525/wk
Houses $575 · Units $450
Population (ERP)
1,952
+0.5% annual growth
Dwelling vacancy
9.7%
Census unoccupied dwellings
Desirability pillars vs the peer median (50th percentile)
Relative standing using percentiles, ranks, and national deciles
Desirability
#8
among Coastal & beach · Emerging
Crime rate
65th
percentile in state (higher = more crime)
Pop. growth
54th
percentile in SA
Rented dwellings
30%
2021 Census tenure
Advantage (IRSAD)
1/10
national SEIFA decile
School ICSEA
37th
percentile among schools with ICSEA
Recent ERP change over 1 and 5 years
Dwelling types from the 2021 Census
Quick scan — open a section below for full context
Data sources & freshness
Median weekly rent from SA Housing Authority rental bond data. Figures can be unreliable where few bonds were lodged in the quarter.
Median house sale prices cover metropolitan Adelaide and selected fringe councils (19 LGAs, including Adelaide Hills and Gawler), not all of regional South Australia.
Contributes to desirability score · Housing (10%) · Future Growth (6%)
Household crowding and healthy vacancy — not cheapness Modest price change as a healthy-growth band
Data sources & freshness
Estimated resident population
1,952(June 2025)
+0.5% annual · +6.6% over 5 years · 54th 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 (~2,050), extrapolated at +1.1% 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.
9.8% of adults have a university degree, compared with 22.6% across South Australia. 22.4% 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.
40th percentile in SA · -11% vs Australia
46th percentile in SA · -13% vs Australia
17th percentile in SA · -35% vs Australia
30th percentile in SA · +2% vs Australia
82nd percentile in SA · +25% vs Australia
Australian Taxation Office Taxation Statistics 2023–24, individuals Table 25. Figures describe taxpayers who live in postcode 5166 — 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
4.9% speak a language other than English at home; 20.1% born overseas
Share of residents who speak a language other than English at home (2021 Census).
59.9%No religion
No religion is the most common response at 59.9%, while Christianity accounts for 30.4%.
| Measure | Suburb | State |
|---|---|---|
| No religion | 59.9% | 45.2% |
| Christianity | 30.4% | 40% |
| Other / not stated | 9.7% | 14.7% |
| Denomination | Suburb | State |
|---|---|---|
| Catholic | 9% | 15.5% |
| Anglican | 7.6% | 7.2% |
| Uniting Church | 4.4% | 4.8% |
| Christian (not further defined) | 2.9% | 2.6% |
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 decreased 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
Contributes to desirability score · Education (14%)
Median school ICSEA first, then school and catchment counts
Data sources & freshness
16 public transport stops in this suburb
Contributes to desirability score · Accessibility (12%)
Public transport stops per 1,000 residents and walkability
Data sources & freshness
87 mapped amenities
1 restaurants · 1 supermarkets · 3 playgrounds · 20 swimming pools · 2 beaches · 1 post offices
Yangara Road
16 bus stops
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
2 named sporting clubs in this suburb
Soccer
Soccer
Named sporting clubs from OpenStreetMap and the SA Sports Vouchers venue list, assigned to this suburb's boundary. Sporting facilities such as ovals, courts and recreation centres are listed under Amenities.
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 and EPA licensed activities.
September 2026
August 2026
July 2026
June 2026
May 2026
Data sources & freshness
1 heritage place
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 3.9 km away).
5.8 percentage points more Labor-leaning than the electorate
Estimated swing since 2022: +4.9 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
Similar suburbs to weigh up side by side — scores, safety, schools, and lifestyle.
Other suburbs in the same local government area.
Similar population and socio-economic profile in other parts of South Australia.