Duncan, SA 5223
Kangaroo IslandAll suburbs in postcode 5223
Updated
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.
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Rent in Duncan
Rental data as of October 2026
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What to know about Duncan
Duncan (5223) sits in the Kangaroo Island region of South Australia.
Duncan has roughly 67 residents, with a young-family demographic. Households are mostly owner-occupied. Daily life is car-dependent: most residents drive to work, school and the shops.
What it’s like to live here
Duncan scores 0/100 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.
Summer days here average around 25°C (mild), winter mornings around 8°C (cool). Annual rainfall lands at about 723 mm. Figures are our 1991 to 2020 averages of SILO data for this location (Queensland Government, built from Bureau of Meteorology observations).
Location
Walkability
- Walk
- 0/100
- Transit
- 0/100
- Bike
- 0/100
Very car dependent. Scores out of 100, calculated from OpenStreetMap data (ODbL).
Walkability data as of May 2026· OpenStreetMap
Demographics
The 2021 Census put Duncan's population at 67, with a median age of 32. That sits as a young-family demographic. Households are mostly owner-occupied (67% own, 19% rent), which shapes everything from school catchment stability to how often properties turn over. The household mix skews family-dominated (86% family households, 19% lone person), so amenity decisions tend to follow what families want: parks, schools, supermarkets.
- Population
- 67
- Median age
- 32
- Family households
- 86%
- Lone person
- 19%
- Owner occupied
- 67%
- Renter occupied
- 19%
Demographics data as of May 2026· ABS 2021 Census
Crime and safety
1 offences recorded in 2025-26
Top offence categories
Source: State Police Open Data
Crime data as of June 2026
Weather year-round
- Annual rainfall
- 723 mm
- Hottest month, avg max
- 24.8°C
- Coldest month, avg min
- 7.9°C
Rainfall by month
Our 1991 to 2020 averages of SILO data (Queensland Government, built from Bureau of Meteorology observations, CC BY 4.0) for this location.
Climate data as of October 2026· SILO (Queensland Government), from Bureau of Meteorology observations
Questions about Duncan
- What is the Duncan postcode?
- Duncan is in the 5223 postcode, in SA, in the Kangaroo Island region.
- Where is Duncan?
- Duncan is a suburb in the Kangaroo Island area, SA 5223.
- How walkable is Duncan?
- Duncan has a Walk Score of 0 out of 100, highly car-dependent. transit score 0, bike score 0.
- What suburbs are near Duncan?
- Duncan is close to Middle River, Newland, Stokes Bay, Parndana, Western River.
- What is the population of Duncan?
- The population of Duncan is approximately 67 (2021 Census). The median age is 32.
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Sources. House and unit medians from the NSW Valuer General, Land Victoria, the SA Government and the ABS; rents from the state rental bond authorities. Census from the ABS (2021), climate from the Bureau of Meteorology, hazard from Geoscience Australia, schools from ACARA and crime from state police open data. Each figure carries its source and date. How we source data
How we’re paid. The guides and this page are free. When a seller asks, we introduce one local agent, and the agent pays us a flat fee for the introduction, never a share of their commission; it costs the seller nothing. If a figure looks wrong, tell us and we’ll fix it.