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ABS 2021 Census · Updated 21 May 2026
One Tree Hill is an outer-metropolitan suburb of Adelaide, Australia, with a population of approximately 1,043, making it a boutique locality. Located approximately 27 km from the Adelaide CBD, One Tree Hill is a outer metro area in South Australia. The median household income is $120,484 per year.
Strong household incomes in One Tree Hill underpin solid property demand.
Official Australia Post postcode for One Tree Hill. 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 One Tree Hill 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.
One Tree Hill is a smaller community of 1,043 — about 28% 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 $120,484/year runs 49% 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. Rent of $305/week (71% coverage of the $1,863/month median mortgage) leaves a gap of roughly $541/month that a typical investor bridges with negative gearing, depreciation and capital growth. At 27 km from Adelaide, One Tree Hill is an outer-metro location where buyers are typically trading commute time for floor space and a lower entry price. Separate houses make up 97% of dwellings — 24 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.
How One Tree Hill stacks up against the median of all South Australia suburbs in our dataset. Positive values mean One Tree Hill sits above the state median; negative means below.
| Metric | One Tree Hill | SA median | Δ vs state |
|---|---|---|---|
| Population | 1,043 | 3,699 | -72% |
| Median household income | $120,484/yr | $80,964/yr | +49% |
| Median rent (weekly) | $305 | $320 | -5% |
| Median mortgage (monthly) | $1,863 | $1,616 | +15% |
| Distance to CBD | 27 km | 13 km | +108% |
| Separate houses | 97% | 73% | +24pp |
Pre-inspection briefing for One Tree Hill — every item is derived from public datasets, with full citations in our data sources page.
Limited buy-and-hold upside: a small population of 1,043 means liquidity is thin and capital growth tends to lag the wider South Australia market over full cycles.
Moderate rental coverage: rent of $305/week covers 71% of a $1,863/month mortgage, leaving a $541/month gap that an investor bridges with equity, depreciation and tax benefits.
With 97% houses in a 1,043-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 One Tree Hill property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Capital-growth expectations for One Tree Hill are modest for 2026 — incomes 49% above the SA median of $80,964 and a population of 1,043 suggest gains will lag headline metro markets. Rental coverage runs at ~71% of the typical mortgage ($1,322/month rent vs $1,863/month repayment), leaving a manageable top-up for most investors. The EquitySight investment score of 63/100 places One Tree Hill 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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One Tree Hill scores 63/100 on our EquitySight investment framework — a good rating. That score is driven by a population of 1,043, median household income of $120,484/year and median weekly rent of $305. 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 One Tree Hill are an above-state-median household income of $120,484/year, a dwelling mix that is 97% 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.
One Tree Hill has a usual resident population of approximately 1,043, 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.
One Tree Hill sits 27 km straight-line from the Adelaide CBD. This is an outer-metro location; local employment and infrastructure announcements tend to move prices more than CBD connectivity alone.
The most recent census recorded a median weekly rent of $305 in One Tree Hill, equating to approximately $15,860/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 One Tree Hill is $1,863, or approximately $22,356/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 $305 works out to $1,322/month, covering 71% of the median mortgage repayment of $1,863/month. That leaves a $541/month shortfall (around $6,492/year before tax benefits), so a typical owner-occupier-priced property here is negatively geared. 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 (1,043 residents), interest-rate sensitivity on the $1,863 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.