Garden Island at a glance
Population
4
Median age 64
The brief
What to know about Garden Island.
The postcode for Garden Island is 5960 (SA).
Garden Island (5960) sits in the South Australia region of South Australia.
Garden Island has roughly 4 residents, with a retiree-heavy demographic. Households are predominantly owner-occupied.
Who lives here
Demographics.
The 2021 Census put Garden Island's population at 4, with a median age of 64. That sits as a retiree-heavy demographic. Households are predominantly owner-occupied (167% own, 0% rent), which shapes everything from school catchment stability to how often properties turn over. Lone-person households are notable here (167%), often a marker of unit-heavy stock and walkable infrastructure.
Population
4
Median age
64
Family households
–
Lone person
167%
Demographics data as of May 2026· ABS 2021 Census
Market
The price of a home here.
Median house price
Verified median pending
We don't yet have a verified suburb-level median for this market. We're working on a data partner; in the meantime, treat the state-level figures as a guide only. How we source data.
Rental and ownership
Weekly rent (house)
–
Weekly rent (unit)
–
Owner occupied
167%
Renter occupied
–
At a deeper level
4
Median age: 64
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Place
Location.
Amenities
Transport
Nearby suburbs
Education
Schools in Garden Island.
Frequently asked
About Garden Island.
- What is the Garden Island postcode?
- Garden Island is in the 5960 postcode, in SA, in the South Australia region.
- Where is Garden Island?
- Garden Island is a regional suburb in SA, postcode 5960, in the South Australia region.
- What is the population of Garden Island?
- The population of Garden Island is approximately 4 (2021 Census). The median age is 64.
For Sale
Garden Island
Buying
Sources cited
Median, growth and rental data from state revenue offices and ABS. Census from ABS 2021. Climate from BoM. Hazard from Geoscience Australia. School data from ACARA. Crime from state police open data. Full methodology →
Always dated
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