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ABS 2021 Census · Updated 21 May 2026
Duffys Forest is a well-established middle-ring suburb of Sydney, Australia, with a population of approximately 509, making it a boutique locality. Located approximately 22 km from the Sydney CBD, Duffys Forest is a middle ring area in New South Wales. The median household income is $221,000 per year.
Strong household incomes in Duffys Forest underpin solid property demand.
Official Australia Post postcode for Duffys Forest. 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 Duffys Forest 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.
Duffys Forest is a smaller community of 509 — about 10% of the New South Wales suburb median (5,325) — so investors should factor in the narrower buyer pool and longer average time-on-market. Median household income of $221,000/year runs 127% above the New South Wales suburb median of $97,552, indicating strong purchasing power and the type of demographic profile that tends to sustain premium property prices through market cycles. Weekly rent of $625 covers just 44% of the median $6,134/month mortgage repayment, leaving a $3,426/month gap — investors should only pursue this suburb with a clear capital-growth thesis and sufficient external income to fund the shortfall. 22 km from Sydney places Duffys Forest in the middle commuter belt, close enough for daily trips by car or rail but at a materially lower price point than inner suburbs. Separate houses make up 94% of dwellings — 18 percentage points above the New South Wales median of 76% — pointing to a family-oriented, land-rich market where value is concentrated in the underlying block.
How Duffys Forest stacks up against the median of all New South Wales suburbs in our dataset. Positive values mean Duffys Forest sits above the state median; negative means below.
| Metric | Duffys Forest | NSW median | Δ vs state |
|---|---|---|---|
| Population | 509 | 5,325 | -90% |
| Median household income | $221,000/yr | $97,552/yr | +127% |
| Median rent (weekly) | $625 | $430 | +45% |
| Median mortgage (monthly) | $6,134 | $2,167 | +183% |
| Distance to CBD | 22 km | 45 km | -51% |
| Separate houses | 94% | 76% | +18pp |
Pre-inspection briefing for Duffys Forest — every item is derived from public datasets, with full citations in our data sources page.
Strong buy-and-hold fundamentals: household incomes run 127% above the New South Wales suburb median ($221,000 vs $97,552), and the 22 km CBD distance keeps this suburb in the primary demand zone. In New South Wales, suburbs with this profile have historically clustered in the upper tercile of 10-year capital growth.
Weak cash flow: $625/week rent covers only 44% of the $6,134/month median mortgage — a $3,426/month gap that must be funded from other income. This suburb is a capital-growth play, not a yield play.
With 94% houses in a 509-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 Duffys Forest property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Duffys Forest enters 2026 with a demographic tailwind — household incomes 127% above the New South Wales suburb median of $97,552 and a population of 509 give it the depth and purchasing power to outperform the wider NSW market over the next 12–18 months. Rental coverage runs at ~44% of the typical mortgage ($2,708/month rent vs $6,134/month repayment), meaning investors will rely on capital growth rather than yield. The EquitySight investment score of 69/100 places Duffys Forest in the upper-middle tier of Australian suburbs we profile, and overall investor sentiment is balanced heading into the second half of 2026.
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Duffys Forest scores 69/100 on our EquitySight investment framework — a good rating. That score is driven by a population of 509, median household income of $221,000/year and median weekly rent of $625. 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 Duffys Forest are proximity to Sydney (22 km), an above-state-median household income of $221,000/year, a dwelling mix that is 94% 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.
Duffys Forest has a usual resident population of approximately 509, compared with a New South Wales suburb median of 5,325 — 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.
Duffys Forest sits 22 km straight-line from the Sydney CBD. This is comfortable commuter territory, with reasonable rail and road access to the city.
The most recent census recorded a median weekly rent of $625 in Duffys Forest, equating to approximately $32,500/year in gross rental income (state median $430/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 Duffys Forest is $6,134, or approximately $73,608/year (vs $2,167/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 $625 works out to $2,708/month, covering 44% of the median mortgage repayment of $6,134/month. That leaves a $3,426/month shortfall (around $41,112/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 (509 residents), interest-rate sensitivity on the $6,134 median mortgage, the broader New South Wales 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.