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ABS 2021 Census · Updated 21 May 2026
Boulder is a regional centre in Western Australia, Australia, with a population of approximately 4,872, making it a boutique locality. Located approximately 550 km from the Perth CBD, Boulder is a regional area in Western Australia. The median household income is $102,336 per year.
Boulder benefits from a high-income resident base, supporting premium property pricing. As a regional location, growth prospects depend on local economic conditions and infrastructure investment.
Official Australia Post postcode for Boulder. 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 Boulder 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.
4,872 residents places Boulder squarely in the middle of the Western Australia suburb size distribution (state median 5,605), with market depth comparable to most WA localities. At $102,336/year, household income in Boulder is within 3% of the Western Australia median ($99,736), placing the suburb firmly in the state's mainstream demographic band. Median weekly rent of $300 equates to $1,300/month — about 100% of the median mortgage repayment of $1,302/month — meaning rental income covers most of a typical owner's repayment and this is a genuine cash-flow suburb before tax benefits. Boulder is 550 km from Perth, so the local market tracks regional employment and lifestyle drivers more than CBD-driven commuter demand.
This suburb suits yield-focused investors who are comfortable with lower liquidity. Employment concentration and local population trends matter more here than in metro markets. Local rents consume roughly 15% of household income — a useful sanity check on tenant affordability.
How Boulder stacks up against the median of all Western Australia suburbs in our dataset. Positive values mean Boulder sits above the state median; negative means below.
| Metric | Boulder | WA median | Δ vs state |
|---|---|---|---|
| Population | 4,872 | 5,605 | -13% |
| Median household income | $102,336/yr | $99,736/yr | +3% |
| Median rent (weekly) | $300 | $350 | -14% |
| Median mortgage (monthly) | $1,302 | $1,902 | -32% |
| Distance to CBD | 550 km | 20 km | +2650% |
| Separate houses | 69% | 79% | -10pp |
Pre-inspection briefing for Boulder — every item is derived from public datasets, with full citations in our data sources page.
Moderate buy-and-hold potential: Boulder's 4,872-person market and $102,336 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: $300/week (~$1,300/month) covers 100% of the $1,302/month median mortgage repayment, so the shortfall sits at just $2/month. Investors targeting positive cash flow should shortlist this suburb.
Only 69% of dwellings are separate houses (vs 79% WA 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 Boulder property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Capital-growth expectations for Boulder are modest for 2026 — incomes close to the WA median of $99,736 and a population of 4,872 suggest gains will lag headline metro markets. Rental coverage runs at ~100% of the typical mortgage ($1,300/month rent vs $1,302/month repayment), keeping cash flow in positive or near-neutral territory. The EquitySight investment score of 56/100 places Boulder 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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Boulder scores 56/100 on our EquitySight investment framework — a moderate rating. That score is driven by a population of 4,872, median household income of $102,336/year and median weekly rent of $300. 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 Boulder are an above-state-median household income of $102,336/year, a dwelling mix that is 69% 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.
Boulder has a usual resident population of approximately 4,872, compared with a Western Australia suburb median of 5,605 — 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.
Boulder sits 550 km straight-line from the Perth 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 $300 in Boulder, equating to approximately $15,600/year in gross rental income (state median $350/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 Boulder is $1,302, or approximately $15,624/year (vs $1,902/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 $300 works out to $1,300/month, covering 100% of the median mortgage repayment of $1,302/month. That leaves a $2/month shortfall (around $24/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 (4,872 residents), interest-rate sensitivity on the $1,302 median mortgage, the broader Western 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.