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South Australia · Postcode 5015
Garden Island postcode and suburb data
South Australia · Phone area code 08 · 14 km from Adelaide
Suburb snapshot
Garden Island at a glance vs SA
Fast facts and benchmark bars show the suburb's key postcode, Census, SEIFA, school and LGA signals in context.
Quick facts
Benchmarks against SA
Income, rent and SEIFA figures are from the ABS 2021 Census and are reported in 2021 dollars, not adjusted for subsequent inflation.
Where Garden Island ranks: household income sits in the bottom 10% of SA suburbs; rents sit in the cheapest 10% in SA.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Garden Island vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Garden Island | SA avg | AU avg | Greater Adelaide |
|---|---|---|---|---|
| Household income/wk | $749 -SA | $1,545 | $1,836 | $1,620 |
| Median age | 64 | 45.0 | 45.0 | 42.0 |
Green pill = at least 10% above the SA average; red = at least 10% below; grey = within 10%. For unemployment, colour polarity is inverted: lower is better.
Garden Island is a coastal suburb of Adelaide in South Australia, with postcode 5015. It sits about 14 km from the Adelaide CBD, within the Unincorporated SA local government area. The suburb footprint covers roughly 1.2 square kilometres.
According to the 2021 Census, Garden Island has a population of 4 with a median age of 64. The median weekly household income is $749, below the SA average.
Housing in Garden Island includes a 3 total dwellings. Housing costs in the area sit below the SA average. Owner-occupied dwellings (owned or mortgaged) make up 100.0% of housing.
Garden Island is part of the Port Adelaide - West statistical area in South Australia.
Garden Island details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5015 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 4 |
| Median Age | 64 years |
| Median Household Income (Census 2021) | $749/week |
| Median Personal Income (Census 2021) | $450/week |
| Average Household Size | 1.3 persons |
| Area | 1.2 km² |
| Population Density | 3/km² |
| Total Dwellings | 3 |
| Australian Citizens | 75.0% |
| Latitude | -34.8360061 |
| Longitude | 138.4999707 |
| Distance from Adelaide | 14 km |
| Region (SA4) | Adelaide - West |
| Area (SA3) | Port Adelaide - West |
| Local Government | Unincorporated SA |
| Federal Electorate | Hindmarsh |
| State Electorate | Port Adelaide |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 0 (0.0%) |
| 15–24 years | 0 (0.0%) |
| 25–44 years | 0 (0.0%) |
| 45–64 years | 0 (0.0%) |
| 65+ years | 5 (125.0%) |
Housing Tenure
Motor Vehicles per Dwelling
| No vehicle | 0 (0.0%) |
| 1 vehicle | 5 (100.0%) |
| 2 vehicles | 0 (0.0%) |
| 3+ vehicles | 0 (0.0%) |
Suburbs Near Garden Island
Same Postcode (5015)
More Garden Island Data
Page last reviewed . Data sources: Australian Bureau of Statistics 2021 Census (CC BY 4.0), SEIFA 2021 IRSAD, ACARA school profiles 2025. How this data is sourced.