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ABS 2021 Census · Updated 21 May 2026
Old Plains is a regional centre in Western Australia, Australia, with a population of approximately 47, making it a boutique locality. Located approximately 103 km from the Perth CBD, Old Plains is a regional area in Western Australia. The median household income is $97,448 per year.
Above-average earnings in Old Plains support sustained property values. Regional positioning means lower entry costs but potentially longer hold periods for capital gains.
Official Australia Post postcode for Old Plains. 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 Old Plains 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.
Old Plains is a smaller community of 47 — about 1% of the Western Australia suburb median (5,605) — so investors should factor in the narrower buyer pool and longer average time-on-market. At $97,448/year, household income in Old Plains is within 2% of the Western Australia median ($99,736), placing the suburb firmly in the state's mainstream demographic band. The median weekly rent of $138 translates to approximately $7,176/year in gross rental income, setting the upper bound on yield before vacancy, rates, insurance and maintenance. Old Plains is 103 km from Perth, so the local market tracks regional employment and lifestyle drivers more than CBD-driven commuter demand. Separate houses make up 100% of dwellings — 21 percentage points above the Western Australia median of 79% — pointing to a family-oriented, land-rich market where value is concentrated in the underlying block.
How Old Plains stacks up against the median of all Western Australia suburbs in our dataset. Positive values mean Old Plains sits above the state median; negative means below.
| Metric | Old Plains | WA median | Δ vs state |
|---|---|---|---|
| Population | 47 | 5,605 | -99% |
| Median household income | $97,448/yr | $99,736/yr | -2% |
| Median rent (weekly) | $138 | $350 | -61% |
| Distance to CBD | 103 km | 20 km | +415% |
| Separate houses | 100% | 79% | +21pp |
Pre-inspection briefing for Old Plains — every item is derived from public datasets, with full citations in our data sources page.
Limited buy-and-hold upside: a small population of 47 means liquidity is thin and capital growth tends to lag the wider Western Australia market over full cycles.
Gross rent of $138/week (~$7,176/year) sets the yield ceiling. Cross-check against your purchase price to confirm whether this suburb hits the 4–5% gross yield most Australian investors target.
With 100% houses in a 47-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 Old Plains property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Capital-growth expectations for Old Plains are modest for 2026 — incomes close to the WA median of $99,736 and a population of 47 suggest gains will lag headline metro markets. Rents sit around $138/week, setting the baseline gross rental income at roughly $7,176/year — refine this against current listings before running your numbers. The EquitySight investment score of 43/100 places Old Plains 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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Old Plains scores 43/100 on our EquitySight investment framework — a moderate rating. That score is driven by a population of 47, median household income of $97,448/year and median weekly rent of $138. 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 Old Plains are a median household income of $97,448/year, a dwelling mix that is 100% 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.
Old Plains has a usual resident population of approximately 47, 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.
Old Plains sits 103 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 $138 in Old Plains, equating to approximately $7,176/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.
A reliable median mortgage figure was not captured for Old Plains. Use our loan serviceability calculator to estimate a realistic monthly repayment for your target purchase price and deposit.
Census data was not complete enough in Old Plains to compute a clean rent-to-mortgage coverage. Use current listings to benchmark weekly rent, then plug your expected purchase price into our rental yield calculator to see whether the investment runs cash-flow positive or negative.
The main risks are a thin buyer pool (47 residents), interest-rate sensitivity, 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.