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ABS 2021 Census · Updated 21 May 2026
Mount Coolum is a coastal suburb in Queensland, Australia, with a population of approximately 4,545, making it a boutique locality. Located approximately 101 km from the Brisbane CBD, Mount Coolum is a coastal area in Queensland. The median household income is $87,880 per year.
Household incomes in Mount Coolum sit in a comfortable mid-range for the Queensland market. Seaside positioning attracts both owner-occupiers and holiday rental demand.
Official Australia Post postcode for Mount Coolum. 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 Mount Coolum on My School →Estimated 2 parks 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.
4,545 residents places Mount Coolum squarely in the middle of the Queensland suburb size distribution (state median 5,474), with market depth comparable to most QLD localities. At $87,880/year, household income in Mount Coolum is within 3% of the Queensland median ($90,298), placing the suburb firmly in the state's mainstream demographic band. Median weekly rent of $450 equates to $1,950/month — about 105% of the median mortgage repayment of $1,863/month — meaning rental income covers most of a typical owner's repayment and this is a genuine cash-flow suburb before tax benefits. Mount Coolum is 101 km from Brisbane, so the local market tracks regional employment and lifestyle drivers more than CBD-driven commuter demand. Only 57% of dwellings are separate houses (vs 77% state median), so this is a unit-heavy market where body-corporate decisions and strata supply meaningfully shape investor returns.
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 27% of household income — a useful sanity check on tenant affordability.
How Mount Coolum stacks up against the median of all Queensland suburbs in our dataset. Positive values mean Mount Coolum sits above the state median; negative means below.
| Metric | Mount Coolum | QLD median | Δ vs state |
|---|---|---|---|
| Population | 4,545 | 5,474 | -17% |
| Median household income | $87,880/yr | $90,298/yr | -3% |
| Median rent (weekly) | $450 | $385 | +17% |
| Median mortgage (monthly) | $1,863 | $1,733 | +8% |
| Distance to CBD | 101 km | 62 km | +63% |
| Separate houses | 57% | 77% | -20pp |
Pre-inspection briefing for Mount Coolum — every item is derived from public datasets, with full citations in our data sources page.
Moderate buy-and-hold potential: Mount Coolum's 4,545-person market and $87,880 median household income work for investors who are selective on street location and property quality rather than counting on a suburb-wide rerating.
Strong rental coverage: $450/week (~$1,950/month) covers 105% of the $1,863/month median mortgage repayment, so the shortfall sits at just $0/month. Investors targeting positive cash flow should shortlist this suburb.
Only 57% of dwellings are separate houses (vs 77% QLD 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 Mount Coolum property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Capital-growth expectations for Mount Coolum are modest for 2026 — incomes close to the QLD median of $90,298 and a population of 4,545 suggest gains will lag headline metro markets. Rental coverage runs at ~105% of the typical mortgage ($1,950/month rent vs $1,863/month repayment), keeping cash flow in positive or near-neutral territory. The EquitySight investment score of 57/100 places Mount Coolum in the mid tier of Australian suburbs we profile, and overall investor sentiment is balanced heading into the second half of 2026.
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Mount Coolum scores 57/100 on our EquitySight investment framework — a moderate rating. That score is driven by a population of 4,545, median household income of $87,880/year and median weekly rent of $450. 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 Mount Coolum are a median household income of $87,880/year, a dwelling mix that is 57% separate houses, roughly 1 schools and 2 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.
Mount Coolum has a usual resident population of approximately 4,545, 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.
Mount Coolum sits 101 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 $450 in Mount Coolum, equating to approximately $23,400/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 Mount Coolum is $1,863, or approximately $22,356/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 $450 works out to $1,950/month, covering 105% of the median mortgage repayment of $1,863/month. That means rent exceeds the median repayment by roughly $87/month, so on these numbers Mount Coolum 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 (4,545 residents), interest-rate sensitivity on the $1,863 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.