O'Sullivan Beach
SA 5166 • Greater Adelaide
About O'Sullivan Beach
O'Sullivan Beach is a seaside suburb in southern Adelaide, approximately 30 km south of the CBD within the City of Onkaparinga. Established in 1926, it has a population of around 1,850 with a notably older demographic and high proportion of single-person households at 63%. The suburb sits along Gulf St Vincent between Christies Beach and Lonsdale.
The suburb offers a relaxed coastal lifestyle with its own beach and boat ramp providing access to Gulf St Vincent. O'Sullivan Beach is popular with retirees and singles seeking affordable seaside living, with a median house price around $738,000. The Southern Montessori School serves local families, and nearby Colonnades Shopping Centre in Noarlunga provides major retail amenities.
O'Sullivan Beach falls under postcode 5166 and is governed by Onkaparinga Council (LGA). For state elections, residents vote in the Reynell electorate.
Location
Transport & Commute
Nearest Train Stations
Bus Services
- 751 — Noarlunga Centre Interchange 15 min
- 755 — Seaford via Christies Beach 10 min
Commute to Adelaide CBD
🛣️ Train from Christies Beach or Christie Downs on Seaford Line
Limited local shops; most errands require driving to Christies Beach or Noarlunga Centre.
Supermarkets Nearby
No major supermarkets listed for this suburb.
Schools
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51 Galloway Road
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53 Galloway Road
Housing 2021 Census
44 state housing + 8 community housing dwellings (ABS 2021 Census)
Educational Institution Attending 2021 Census
School Sector Breakdown
Demographics
Population Growth
Gender Distribution (Census 2021)
Income Comparison
Country of Birth 2021 Census
Top Countries of Birth (excl. Australia)
- 1. England 157
- 2. Germany 25
- 3. New Zealand 22
- 4. South Africa 19
- 5. Scotland 15
- 6. China 9
- 7. Netherlands 9
- 8. United States 9
- 9. Japan 7
- 10. Papua New Guinea 6
Ancestry 2021 Census
Top ancestries reported (people may report up to two)