Cassini at a glance
Walk score
2
Very car dependent
Population
73
Median age 41
The brief
What to know about Cassini.
The postcode for Cassini is 5223 (SA).
Cassini (5223) sits in the Kangaroo Island region of South Australia.
Cassini has roughly 73 residents, with a typical family-age mix. Households are mostly owner-occupied. Daily life is car-dependent: most residents drive to work, school and the shops.
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What it’s like to live here.
Cassini scores 2/100 on walkability, which makes it car-dependent with limited public transport. Plan for two cars in a typical household, especially if work isn't local.
Who lives here
Demographics.
The 2021 Census put Cassini's population at 73, with a median age of 41. That sits as a typical family-age mix. Households are mostly owner-occupied (70% own, 0% rent), which shapes everything from school catchment stability to how often properties turn over. The household mix skews family-dominated (78% family households, 22% lone person), so amenity decisions tend to follow what families want: parks, schools, supermarkets.
Population
73
Median age
41
Family households
78%
Lone person
22%
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)
$211/wk
Weekly rent (unit)
$100/wk
Owner occupied
70%
Renter occupied
–
At a deeper level
73
Median age: 41
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Safety
Crime and safety.
1
total offences in 2025-26
Top offence categories
Crime statistics are reported at LGA level and may cover a broader area than this suburb.
Source: State Police Open Data
Crime data as of June 2026· State Police Open Data
Getting around
Walkability.
2
0
0
Scores calculated from OpenStreetMap data (ODbL)
Walkability data as of May 2026· OpenStreetMap
Place
Location.
Amenities
Transport
Nearby suburbs
Education
Schools in Cassini.
Local schools for Cassini
View the catchment for each school to find out more.
Government School Catchment
Kangaroo Island Community Education
© ACARA, licensed under CC BY 4.0.
Frequently asked
About Cassini.
- What is the Cassini postcode?
- Cassini is in the 5223 postcode, in SA, in the Kangaroo Island region.
- Where is Cassini?
- Cassini is a regional suburb in SA, postcode 5223, in the Kangaroo Island region.
- What is the average rent in Cassini?
- The median weekly rent for houses is $211, for units it's $100.
- What schools are in Cassini?
- There are 1 schools serving Cassini on this page, including Kangaroo Island Community Education.
- How walkable is Cassini?
- Cassini has a Walk Score of 2 out of 100, highly car-dependent. transit score 0, bike score 0.
- What suburbs are near Cassini?
- Cassini is close to Stokes Bay, Middle River, Duncan, Parndana, Menzies.
- What is the population of Cassini?
- The population of Cassini is approximately 73 (2021 Census). The median age is 41.
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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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