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ABS 2021 Census · Updated 21 May 2026
Koah is a coastal suburb in Queensland, Australia, with a population of approximately 676, making it a boutique locality. Located approximately 1402 km from the Brisbane CBD, Koah is a coastal area in Queensland. The median household income is $80,756 per year.
Moderate income levels in Koah indicate steady rental demand from working households. Coastal lifestyle appeal adds a premium that supports long-term demand.
Official Australia Post postcode for Koah. 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 Koah 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.
Koah is a smaller community of 676 — about 12% of the Queensland suburb median (5,474) — so investors should factor in the narrower buyer pool and longer average time-on-market. Household income of $80,756/year is 11% below the Queensland median of $90,298, typically translating into lower entry prices and a tenant base more sensitive to rent increases. Rent of $288/week (72% coverage of the $1,733/month median mortgage) leaves a gap of roughly $485/month that a typical investor bridges with negative gearing, depreciation and capital growth. Koah is 1402 km from Brisbane, so the local market tracks regional employment and lifestyle drivers more than CBD-driven commuter demand.
How Koah stacks up against the median of all Queensland suburbs in our dataset. Positive values mean Koah sits above the state median; negative means below.
| Metric | Koah | QLD median | Δ vs state |
|---|---|---|---|
| Population | 676 | 5,474 | -88% |
| Median household income | $80,756/yr | $90,298/yr | -11% |
| Median rent (weekly) | $288 | $385 | -25% |
| Median mortgage (monthly) | $1,733 | $1,733 | 0% |
| Distance to CBD | 1402 km | 62 km | +2161% |
| Separate houses | 86% | 77% | +9pp |
Pre-inspection briefing for Koah — every item is derived from public datasets, with full citations in our data sources page.
Limited buy-and-hold upside: a small population of 676 means liquidity is thin and capital growth tends to lag the wider Queensland market over full cycles.
Moderate rental coverage: rent of $288/week covers 72% of a $1,733/month mortgage, leaving a $485/month gap that an investor bridges with equity, depreciation and tax benefits.
With 86% houses in a 676-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 Koah property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Capital-growth expectations for Koah are modest for 2026 — incomes 11% below the QLD median of $90,298 and a population of 676 suggest gains will lag headline metro markets. Rental coverage runs at ~72% of the typical mortgage ($1,248/month rent vs $1,733/month repayment), leaving a manageable top-up for most investors. The EquitySight investment score of 42/100 places Koah in the mid tier of Australian suburbs we profile, and overall investor sentiment is cautious heading into the second half of 2026.
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Koah scores 42/100 on our EquitySight investment framework — a moderate rating. That score is driven by a population of 676, median household income of $80,756/year and median weekly rent of $288. 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 Koah are a median household income of $80,756/year, a dwelling mix that is 86% 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.
Koah has a usual resident population of approximately 676, compared with a Queensland suburb median of 5,474 — 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.
Koah sits 1402 km straight-line from the Brisbane 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 $288 in Koah, equating to approximately $14,976/year in gross rental income (state median $385/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 Koah is $1,733, or approximately $20,796/year (vs $1,733/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 $288 works out to $1,248/month, covering 72% of the median mortgage repayment of $1,733/month. That leaves a $485/month shortfall (around $5,820/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 (676 residents), interest-rate sensitivity on the $1,733 median mortgage, the broader Queensland 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.