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ABS 2021 Census · Updated 21 May 2026
Onkaparinga Hills is a coastal suburb in South Australia, Australia, with a population of approximately 2,610, making it a boutique locality. Located approximately 23 km from the Adelaide CBD, Onkaparinga Hills is a coastal area in South Australia. The median household income is $108,056 per year.
Onkaparinga Hills benefits from a high-income resident base, supporting premium property pricing. Coastal lifestyle appeal adds a premium that supports long-term demand.
Official Australia Post postcode for Onkaparinga Hills. A postcode may cover multiple suburbs.
Australia Post Postcode Finder →Usual resident population at the most recent census.
Weekly median rent for occupied homes. Live rental data integration coming soon.
Annual median household income (before tax) across all households.
Straight-line distance from the suburb centroid to the nearest capital city CBD. Actual driving distance will be longer.
Estimated 1 school within or near this suburb.
Find schools near Onkaparinga Hills on My School →Estimated 1 park and green spaces near this suburb.
Monthly median mortgage repayment for households currently paying off a mortgage.
Proportion of separate houses versus units, townhouses, and other home types. Useful for investors assessing rental demand mix.
Onkaparinga Hills is a smaller community of 2,610 — about 71% of the South Australia suburb median (3,699) — so investors should factor in the narrower buyer pool and longer average time-on-market. Median household income of $108,056/year runs 33% above the South Australia suburb median of $80,964, indicating strong purchasing power and the type of demographic profile that tends to sustain premium property prices through market cycles. Median weekly rent of $385 equates to $1,668/month — about 103% of the median mortgage repayment of $1,625/month — meaning rental income covers most of a typical owner's repayment and this is a genuine cash-flow suburb before tax benefits. 23 km from Adelaide places Onkaparinga Hills in the middle commuter belt, close enough for daily trips by car or rail but at a materially lower price point than inner suburbs. Separate houses make up 96% of dwellings — 23 percentage points above the South Australia median of 73% — pointing to a family-oriented, land-rich market where value is concentrated in the underlying block.
This suburb can suit investors targeting renter demand driven by lifestyle. Insurance, climate risk, and seasonal rental patterns all warrant a close look. Local rents consume roughly 19% of household income — a useful sanity check on tenant affordability.
How Onkaparinga Hills stacks up against the median of all South Australia suburbs in our dataset. Positive values mean Onkaparinga Hills sits above the state median; negative means below.
| Metric | Onkaparinga Hills | SA median | Δ vs state |
|---|---|---|---|
| Population | 2,610 | 3,699 | -29% |
| Median household income | $108,056/yr | $80,964/yr | +33% |
| Median rent (weekly) | $385 | $320 | +20% |
| Median mortgage (monthly) | $1,625 | $1,616 | +1% |
| Distance to CBD | 23 km | 13 km | +77% |
| Separate houses | 96% | 73% | +23pp |
Pre-inspection briefing for Onkaparinga Hills — every item is derived from public datasets, with full citations in our data sources page.
Strong buy-and-hold fundamentals: household incomes run 33% above the South Australia suburb median ($108,056 vs $80,964), and the 23 km CBD distance keeps this suburb in the primary demand zone. In South Australia, suburbs with this profile have historically clustered in the upper tercile of 10-year capital growth.
Strong rental coverage: $385/week (~$1,668/month) covers 103% of the $1,625/month median mortgage repayment, so the shortfall sits at just $0/month. Investors targeting positive cash flow should shortlist this suburb.
With 96% houses in a 2,610-person market, renovation margins depend on individual street and aspect rather than any suburb-wide story — do comparable-sales analysis before committing capital.
Run the numbers on a Onkaparinga Hills property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Onkaparinga Hills enters 2026 with a demographic tailwind — household incomes 33% above the South Australia suburb median of $80,964 and a population of 2,610 give it the depth and purchasing power to outperform the wider SA market over the next 12–18 months. Rental coverage runs at ~103% of the typical mortgage ($1,668/month rent vs $1,625/month repayment), keeping cash flow in positive or near-neutral territory. The EquitySight investment score of 61/100 places Onkaparinga Hills in the upper-middle tier of Australian suburbs we profile, and overall investor sentiment is balanced heading into the second half of 2026.
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Onkaparinga Hills scores 61/100 on our EquitySight investment framework — a good rating. That score is driven by a population of 2,610, median household income of $108,056/year and median weekly rent of $385. Whether it fits your portfolio depends on whether you are targeting cash flow, capital growth, or a value-add renovation — all three are scored with suburb-specific numbers elsewhere on this page.
The main demand drivers in Onkaparinga Hills are proximity to Adelaide (23 km), an above-state-median household income of $108,056/year, a dwelling mix that is 96% separate houses, roughly 1 schools and 1 parks within the catchment. Together these shape both owner-occupier and tenant demand and are the factors we weight most heavily in the suburb's investment score.
Onkaparinga Hills has a usual resident population of approximately 2,610, compared with a South Australia suburb median of 3,699 — placing it in the lower half of the state's suburbs by size. Population is the clearest proxy for market depth: more residents mean more transactions and typically a shorter average days-on-market on resale.
Onkaparinga Hills sits 23 km straight-line from the Adelaide CBD. This is comfortable commuter territory, with reasonable rail and road access to the city.
The most recent census recorded a median weekly rent of $385 in Onkaparinga Hills, equating to approximately $20,020/year in gross rental income (state median $320/week). Market rents have typically drifted above the recorded figure — verify against current listings on realestate.com.au and Domain before making an offer.
The median monthly mortgage repayment in Onkaparinga Hills is $1,625, or approximately $19,500/year (vs $1,616/month state median). Stress-test your own borrowing at rates 1–2 percentage points above today's to make sure you can still service the loan through an RBA tightening cycle.
A median weekly rent of $385 works out to $1,668/month, covering 103% of the median mortgage repayment of $1,625/month. That means rent exceeds the median repayment by roughly $43/month, so on these numbers Onkaparinga Hills leans cash-flow-positive before accounting for strata, council rates, insurance and maintenance. Actual cash flow depends on your deposit, loan terms, ownership costs and marginal tax rate — run the full numbers in our rental yield calculator.
The main risks are a thin buyer pool (2,610 residents), interest-rate sensitivity on the $1,625 median mortgage, the broader South Australia market cycle. Each of these is covered in the Risk Factors section above with suburb-specific numbers rather than generic warnings.
Every number on this page comes from the ABS 2021 Census of Population and Housing, Australia Post postcode reference data, and OpenStreetMap amenity tiles. The investment score, strategy verdicts, and comparison table are computed deterministically from those inputs — no opinion, no estimation. See our full methodology and the data sources and licences for the formulas we use.