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ABS 2021 Census · Updated 21 May 2026
Coffin Bay is a coastal suburb in South Australia, Australia, with a population of approximately 664, making it a boutique locality. Located approximately 299 km from the Adelaide CBD, Coffin Bay is a coastal area in South Australia. The median household income is $65,208 per year.
Lower income levels in Coffin Bay typically translate to more affordable entry points for investors. The coastal setting provides a lifestyle factor that underpins property values.
Official Australia Post postcode for Coffin Bay. 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 Coffin Bay 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.
Coffin Bay is a smaller community of 664 — about 18% of the South Australia suburb median (3,699) — so investors should factor in the narrower buyer pool and longer average time-on-market. Household income of $65,208/year is 19% below the South Australia median of $80,964, typically translating into lower entry prices and a tenant base more sensitive to rent increases. Median weekly rent of $273 equates to $1,183/month — about 91% of the median mortgage repayment of $1,300/month — meaning rental income covers most of a typical owner's repayment and this is a genuine cash-flow suburb before tax benefits. Coffin Bay is 299 km from Adelaide, so the local market tracks regional employment and lifestyle drivers more than CBD-driven commuter demand. Only 44% of dwellings are separate houses (vs 73% state median), so this is a unit-heavy market where body-corporate decisions and strata supply meaningfully shape investor returns.
How Coffin Bay stacks up against the median of all South Australia suburbs in our dataset. Positive values mean Coffin Bay sits above the state median; negative means below.
| Metric | Coffin Bay | SA median | Δ vs state |
|---|---|---|---|
| Population | 664 | 3,699 | -82% |
| Median household income | $65,208/yr | $80,964/yr | -19% |
| Median rent (weekly) | $273 | $320 | -15% |
| Median mortgage (monthly) | $1,300 | $1,616 | -20% |
| Distance to CBD | 299 km | 13 km | +2200% |
| Separate houses | 44% | 73% | -29pp |
Pre-inspection briefing for Coffin Bay — every item is derived from public datasets, with full citations in our data sources page.
Limited buy-and-hold upside: a small population of 664 means liquidity is thin and capital growth tends to lag the wider South Australia market over full cycles.
Strong rental coverage: $273/week (~$1,183/month) covers 91% of the $1,300/month median mortgage repayment, so the shortfall sits at just $117/month. Investors targeting positive cash flow should shortlist this suburb.
Only 44% 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 Coffin Bay property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Capital-growth expectations for Coffin Bay are modest for 2026 — incomes 19% below the SA median of $80,964 and a population of 664 suggest gains will lag headline metro markets. Rental coverage runs at ~91% of the typical mortgage ($1,183/month rent vs $1,300/month repayment), keeping cash flow in positive or near-neutral territory. The EquitySight investment score of 35/100 places Coffin Bay 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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Coffin Bay scores 35/100 on our EquitySight investment framework — a weak rating. That score is driven by a population of 664, median household income of $65,208/year and median weekly rent of $273. 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 Coffin Bay are a median household income of $65,208/year, a dwelling mix that is 44% 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.
Coffin Bay has a usual resident population of approximately 664, 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.
Coffin Bay sits 299 km straight-line from the Adelaide CBD. This is a regional market where CBD distance is only indicative — local industry diversity and commute alternatives matter more.
The most recent census recorded a median weekly rent of $273 in Coffin Bay, equating to approximately $14,196/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 Coffin Bay is $1,300, or approximately $15,600/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 $273 works out to $1,183/month, covering 91% of the median mortgage repayment of $1,300/month. That leaves a $117/month shortfall (around $1,404/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 (664 residents), interest-rate sensitivity on the $1,300 median mortgage, below-median household incomes ($65,208 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.