South Australia · Suburb Profile
Garden Island SA — Suburb Profile
Population, median income, rent prices, housing costs and demographics for Garden Island, South Australia. ABS Census 2021.
The population of Garden Island SA is 4 according to the 2021 Census. The median personal income in Garden Island is $450 per week ($23,400 per year). Garden Island has a median age of 64 years, older than the national median of 38. Garden Island has a population density of 3.3 people per km².
The most common religion is Catholic (100% of residents).
There were 3 recorded offences in Garden Island in 2025-26, a rate of 750 offences per 1,000 people. The most common offence category was theft (1 offences).
Garden Island Map
Garden Island Population
Garden Island Median Income & Rent
Garden Island Demographics
Gender Split
Population Density
Households
Garden Island Age Distribution
Source: ABS Census 2021 — Suburb & Locality (SAL)
Garden Island Housing Tenure
Source: ABS Census 2021 — Suburb & Locality (SAL)
Garden Island Country of Birth
Source: ABS Census 2021 G09 — Country of Birth by SAL
Garden Island Religion
Source: ABS Census 2021 G14 — Religion by SAL
Garden Island Education Level
Source: ABS Census 2021 G16 — Highest Year of School by SAL
Garden Island Employment
Source: ABS Census 2021 G46 — Labour Force Status by SAL
Garden Island Qualifications
Source: ABS Census 2021 G49 — Non-School Qualification by SAL
Garden Island Marital Status
Source: ABS Census 2021 G05 — Marital Status by SAL
Garden Island Ancestry
Source: ABS Census 2021 G08 — Ancestry by SAL
Garden Island Need for Assistance
Source: ABS Census 2021 G18 — Core Activity Need for Assistance by SAL
Garden Island Volunteering
Source: ABS Census 2021 G23 — Voluntary Work by SAL
Garden Island Car Ownership
Source: ABS Census 2021 G34 — Motor Vehicles per Dwelling by SAL
Garden Island Number of Bedrooms
Source: ABS Census 2021 G41 — Number of Bedrooms by SAL
Garden Island Population Mobility
Source: ABS Census 2021 G43 — Summary by SAL
Garden Island Indigenous Population
Source: ABS Census 2021 G07 — Indigenous Status by SAL
Garden Island Family Structure
Source: ABS Census 2021 G29 — Family Composition by SAL
Garden Island Military Service
Source: ABS Census 2021 G22 — ADF Service by SAL
Garden Island Unpaid Carers
Source: ABS Census 2021 G25 — Unpaid Assistance by SAL
Garden Island Household Size
Source: ABS Census 2021 G35 — Household Size by SAL
Garden Island Crime Statistics
Reported offences in 2025-26 — 3 total
Offence trend by year:
Source: SA Government Open Data — data.sa.gov.au
Garden Island Rent Prices & Affordability
Rent is under 25% of household income — generally considered affordable.
If you earn X in Garden Island
Garden Island vs State & National Average
Nearby Suburbs in SA
Compare Garden Island (SA)
Frequently Asked Questions About Garden Island
What is the population of Garden Island SA?
The population of Garden Island SA is 4 according to the ABS Census 2021.The suburb has a population density of 3.3 people per km².
What is the median income in Garden Island?
The median personal income in Garden Island SA is $450 per week, or $23,400 per year.The median household income is $749 per week.Family income is $900 per week.
What is the median age in Garden Island?
The median age in Garden Island SA is 64 years.This is older than the national median age of 38 years.
Is Garden Island a good suburb to live in?
Garden Island is a suburb in South Australia with a population of 4.The median income is $450/wk, which is below the SA average of $763/wk.Rent affordability is rated as affordable (0.0% of household income). See the full suburb profile above for detailed statistics.
Data: Australian Bureau of Statistics, Census of Population and Housing 2021. SA2 area: 40473. All dollar figures in AUD.