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ABS 2021 Census · Updated 21 May 2026
Double Bay is a regional centre in New South Wales, Australia, with a population of approximately 4,709, making it a boutique locality. Located 3 km from the Sydney CBD, Double Bay is a regional area in New South Wales. The median household income is $160,004 per year.
Strong household incomes in Double Bay underpin solid property demand. Close CBD access strengthens tenant appeal and resale value.
Official Australia Post postcode for Double Bay. 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 Double Bay 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.
4,709 residents places Double Bay squarely in the middle of the New South Wales suburb size distribution (state median 5,325), with market depth comparable to most NSW localities. Median household income of $160,004/year runs 64% 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. Median weekly rent of $720 equates to $3,120/month — about 104% of the median mortgage repayment of $3,000/month — meaning rental income covers most of a typical owner's repayment and this is a genuine cash-flow suburb before tax benefits. At 3 km from the Sydney CBD, Double Bay sits inside the high-demand inner ring — properties here compete directly with the city's employment, transport and amenity networks. Only 11% of dwellings are separate houses (vs 76% state median), so this is a unit-heavy market where body-corporate decisions and strata supply meaningfully shape investor returns.
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 23% of household income — a useful sanity check on tenant affordability.
How Double Bay stacks up against the median of all New South Wales suburbs in our dataset. Positive values mean Double Bay sits above the state median; negative means below.
| Metric | Double Bay | NSW median | Δ vs state |
|---|---|---|---|
| Population | 4,709 | 5,325 | -12% |
| Median household income | $160,004/yr | $97,552/yr | +64% |
| Median rent (weekly) | $720 | $430 | +67% |
| Median mortgage (monthly) | $3,000 | $2,167 | +38% |
| Distance to CBD | 3 km | 45 km | -93% |
| Separate houses | 11% | 76% | -65pp |
Pre-inspection briefing for Double Bay — every item is derived from public datasets, with full citations in our data sources page.
Strong buy-and-hold fundamentals: household incomes run 64% above the New South Wales suburb median ($160,004 vs $97,552), and the 3 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.
Strong rental coverage: $720/week (~$3,120/month) covers 104% of the $3,000/month median mortgage repayment, so the shortfall sits at just $0/month. Investors targeting positive cash flow should shortlist this suburb.
Only 11% of dwellings are separate houses (vs 76% NSW 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 Double Bay property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Double Bay enters 2026 with a demographic tailwind — household incomes 64% above the New South Wales suburb median of $97,552 and a population of 4,709 give it the depth and purchasing power to outperform the wider NSW market over the next 12–18 months. Rental coverage runs at ~104% of the typical mortgage ($3,120/month rent vs $3,000/month repayment), keeping cash flow in positive or near-neutral territory. The EquitySight investment score of 81/100 places Double Bay in the top tier of Australian suburbs we profile, and overall investor sentiment is constructive heading into the second half of 2026.
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Double Bay scores 81/100 on our EquitySight investment framework — a strong rating. That score is driven by a population of 4,709, median household income of $160,004/year and median weekly rent of $720. 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 Double Bay are proximity to Sydney (3 km), an above-state-median household income of $160,004/year, a dwelling mix that is 11% 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.
Double Bay has a usual resident population of approximately 4,709, 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.
Double Bay sits 3 km straight-line from the Sydney CBD. This is inner-ring territory — pricing competes directly with established Sydney employment nodes.
The most recent census recorded a median weekly rent of $720 in Double Bay, equating to approximately $37,440/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 Double Bay is $3,000, or approximately $36,000/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 $720 works out to $3,120/month, covering 104% of the median mortgage repayment of $3,000/month. That means rent exceeds the median repayment by roughly $120/month, so on these numbers Double Bay 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 (4,709 residents), interest-rate sensitivity on the $3,000 median mortgage, a unit-heavy dwelling mix (11% houses) where body-corporate costs and apartment supply affect resale, 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.