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ABS 2021 Census · Updated 21 May 2026
Aldinga is a coastal suburb in South Australia, Australia, with a population of approximately 764, making it a boutique locality. Located approximately 40 km from the Adelaide CBD, Aldinga is a coastal area in South Australia. The median household income is $57,304 per year.
Lower income levels in Aldinga typically translate to more affordable entry points for investors. Seaside positioning attracts both owner-occupiers and holiday rental demand.
Official Australia Post postcode for Aldinga. 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 Aldinga 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.
Aldinga is a smaller community of 764 — about 21% of the South Australia suburb median (3,699) — so investors should factor in the narrower buyer pool and longer average time-on-market. Aldinga's median household income of $57,304/year is 29% below the South Australia suburb median ($80,964) — this is an affordability play where returns lean on yield and patient capital growth rather than demographic premium. Rent of $255/week (73% coverage of the $1,517/month median mortgage) leaves a gap of roughly $412/month that a typical investor bridges with negative gearing, depreciation and capital growth. At 40 km from Adelaide, Aldinga is an outer-metro location where buyers are typically trading commute time for floor space and a lower entry price.
How Aldinga stacks up against the median of all South Australia suburbs in our dataset. Positive values mean Aldinga sits above the state median; negative means below.
| Metric | Aldinga | SA median | Δ vs state |
|---|---|---|---|
| Population | 764 | 3,699 | -79% |
| Median household income | $57,304/yr | $80,964/yr | -29% |
| Median rent (weekly) | $255 | $320 | -20% |
| Median mortgage (monthly) | $1,517 | $1,616 | -6% |
| Distance to CBD | 40 km | 13 km | +208% |
| Separate houses | 60% | 73% | -13pp |
Pre-inspection briefing for Aldinga — every item is derived from public datasets, with full citations in our data sources page.
Limited buy-and-hold upside: a small population of 764 means liquidity is thin and capital growth tends to lag the wider South Australia market over full cycles.
Moderate rental coverage: rent of $255/week covers 73% of a $1,517/month mortgage, leaving a $412/month gap that an investor bridges with equity, depreciation and tax benefits.
Only 60% of dwellings are separate houses (vs 73% SA median) — this is a unit and townhouse market, where cosmetic flips struggle against body-corporate restrictions, thinner after-reno uplift and competing new supply.
Run the numbers on a Aldinga property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Capital-growth expectations for Aldinga are modest for 2026 — incomes 29% below the SA median of $80,964 and a population of 764 suggest gains will lag headline metro markets. Rental coverage runs at ~73% of the typical mortgage ($1,105/month rent vs $1,517/month repayment), leaving a manageable top-up for most investors. The EquitySight investment score of 34/100 places Aldinga in the lower tier of Australian suburbs we profile, and overall investor sentiment is cautious heading into the second half of 2026.
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Aldinga scores 34/100 on our EquitySight investment framework — a weak rating. That score is driven by a population of 764, median household income of $57,304/year and median weekly rent of $255. 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 Aldinga are a median household income of $57,304/year, a dwelling mix that is 60% 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.
Aldinga has a usual resident population of approximately 764, 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.
Aldinga sits 40 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 $255 in Aldinga, equating to approximately $13,260/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 Aldinga is $1,517, or approximately $18,204/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 $255 works out to $1,105/month, covering 73% of the median mortgage repayment of $1,517/month. That leaves a $412/month shortfall (around $4,944/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 (764 residents), interest-rate sensitivity on the $1,517 median mortgage, below-median household incomes ($57,304 vs $80,964 state median), 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.