ABS 2021 Census · Updated 31 March 2026
Garden Island is a well-established middle-ring suburb of Adelaide, Australia, with a population of approximately 4, making it a boutique locality. Located approximately 15 km from the Adelaide CBD, Garden Island is a middle ring area in South Australia. The median household income is $38,948 AUD per year (ABS 2021 Census).
Household earnings in Garden Island are below the state average, which may affect long-term capital growth. The short commute to the city centre is a key demand driver.
Map shows Garden Island, South Australia, Australia.
Official Australia Post postcode for Garden Island. A postcode may cover multiple suburbs.
Australia Post Postcode Finder →Usual resident population at census night. Source: ABS 2021 Census of Population and Housing.
ABS Census Data →Weekly median rent for occupied private dwellings. Source: ABS 2021 Census. Live rental data integration coming soon.
State Rental Authority →Annual median household income (before tax) for all households. Source: ABS 2021 Census.
ABS Census Data →Straight-line distance from the suburb centroid (ABS 2021 SAL geography) to the nearest capital city CBD. Actual driving distance will be longer.
Estimated 1 school within or near this suburb based on ABS 2021 data.
Find schools near Garden Island on My School →Estimated 1 park and green spaces near this suburb. Source: ABS 2021 data.
Monthly median mortgage repayment for households currently paying off a mortgage. Source: ABS 2021 Census.
ABS Census Data →Proportion of separate houses vs units, townhouses, and other dwelling types. Source: ABS 2021 Census. Relevant for investors assessing rental demand mix.
ABS Census Data →Garden Island's middle-ring location balances affordability with accessibility. These suburbs often benefit from established infrastructure, good schools, and transport links — making them attractive to families and long-term tenants.
Garden Island offers moderate buy-and-hold potential — look for properties with value-add opportunities.
Garden Island's rental market favours investors seeking yield — occupancy rates are typically strong in this area.
Limited buyer depth in Garden Island makes flip strategies higher-risk — consider rental conversion instead.
Run the numbers on a Garden Island property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Price movement in Garden Island is expected to be flat to modest in 2026, reflecting broader regional market conditions. Tenants in Garden Island have options — presenting well-maintained properties is key to minimising vacancy. Garden Island is not a headline market, but contrarian investors may see long-term potential.
Garden Island is a middle ring area in South Australia with a population of 4. the median household income is $38,948/year (ABS 2021 Census). As with any property investment, conduct thorough due diligence on current listings, vacancy rates, and local infrastructure plans before committing.
Key demand drivers in Garden Island include established amenities and transport access. The area has approximately 1 schools and 1 parks nearby.
According to the ABS 2021 Census, Garden Island has a population of approximately 4. For historical population trends and intercensal estimates, visit the ABS Census Data Explorer at abs.gov.au.
Garden Island is approximately 15 km straight-line distance from the Adelaide CBD (calculated from ABS 2021 suburb centroid coordinates). This is within comfortable commuting range with good transport links.