Island Beach flood map & planning overlays
A planning-constraint profile of Island Beach
(Kangaroo Island Council, SA) - 2.05 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
2.05 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Island Beach's boundary, with the flood, bushfire and environmental overlays drawn on top. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Island Beach
Two different things, kept apart on purpose. The ANEF contour is the planning instrument - a forecast published per airport that planning schemes use to control noise-sensitive development. Observed overflight is what a sampled aircraft-tracking feed actually recorded over the suburb - where aircraft flew, how low and how often.
Observed overflight - sampled 4 Sep to 3 Oct 2026
Night movements: not established - night is sampled as often as day, but too few night flights have been seen here to conclude either way.
Traffic is sampled rather than watched continuously, so every figure is a floor: aircraft not captured between samples are not represented. Rates are per 500 m square - the busiest square in the suburb, not a count of flights over the suburb - and a square is only rated where enough traffic was seen to measure it. Altitudes are above mean sea level. Flight paths change with runway use, weather, season and airspace design. This is a record of observed traffic; it is not a noise contour and not a planning control.
Island Beach at a glance
How Island Beach is zoned
Selling in Island Beach? The zone and overlays on this page are the Planning and Design Code controls a Form 1 vendor's statement has to disclose.
Across its 2.05 km², Island Beach is highly constrained by planning overlays. About 20% of the suburb sits within a mapped flood overlay, and 85% is flagged bushfire-prone. The dominant land-use zone is Rural Shack Settlement. The median lot measures about 2,310 m² across 314 parcels.
Who lives in Island Beach
Census 2021 figures published by the ABS for the Island Beach suburb boundary itself, not a wider region.
Socio-economic standing
ABS SEIFA 2021 ranks every Australian suburb. Decile 1 is the most disadvantaged tenth of the country, decile 10 the least.
Score 975, and decile 5 within South Australia. The national average is 1000.
Age profile
Share of Island Beach's 71 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Kangaroo Island, the wider ABS statistical area containing Island Beach. There is no annual population series published at suburb level, so this describes the surrounding area rather than Island Beach itself.
4,227 in 2001 to 5,212 in 2025, up 23%.
Source: ABS Census 2021 and SEIFA 2021 (Suburbs and Localities), Regional Population (SA2), CC BY 4.0. Small counts are randomly adjusted by the ABS.
Island Beach data sources and coverage
“Not mapped” means we hold no source layer for this suburb - never an all-clear.
| Dataset | Coverage | Publisher |
|---|---|---|
| Flood mapping | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Bushfire-prone mapping | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Zoning | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Heritage and environment | Mapped where published | the South Australian Planning and Design Code and Location SA spatial data |
| Aircraft noise contours (ANEF) | Not held | the South Australian Planning and Design Code and Location SA spatial data, Defence |
| Observed flight paths | Observed | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 3 October 2026. See the methodology and full source list. Source data changes over time and critical decisions should be checked with the responsible authority.
Check a specific Island Beach address
See exactly which overlays touch a single property - the interactive map is free. Need it on paper? A full planning PDF is just $9.
The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Island Beach lot.
See what's in the $9 report →Island Beach planning - frequently asked
Is Island Beach flood-prone?
About 20% of Island Beach falls within a mapped flood overlay, against the council-wide suburb average of 7%.
Is Island Beach bushfire-prone?
Around 85% of Island Beach is mapped as bushfire-prone, compared with a Kangaroo Island Council average of 96%.
Is Island Beach under a flight path?
Aircraft were observed over about 8% of Island Beach in the period sampled, but only above 3,000 ft - the lowest measured was 8,000 ft. Traffic is sampled rather than watched continuously and flight paths change with runway use, weather and season; the ANEF contour is the planning instrument.
What is the zoning in Island Beach?
The dominant planning zone in Island Beach is Rural Shack Settlement, though the suburb also includes Rural Living and Conservation.
Does Island Beach have heritage-listed places?
No heritage-listed places are on record within Island Beach.
What is the typical lot size in Island Beach?
Across 314 surveyed parcels in Island Beach, the median lot size is about 2,310 m².
What is the population of Island Beach?
At the 2021 Census Island Beach had 71 usual residents, with a median age of 60 and an average household size of 1.7 people. The wider Kangaroo Island statistical area, which contains Island Beach, went from 4,227 people in 2001 to 5,212 in 2025, up 23%.
Is Island Beach an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Island Beach scores 975 and sits in decile 5 of 10 nationally and decile 5 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Island Beach?
Median household income in Island Beach was $725 a week at the 2021 Census, against $1,249 for the typical suburb in Kangaroo Island Council. Median rent was $220 a week and the median mortgage repayment $1,142 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Sapphiretown | 1.5 km | 60% | 47% |
| American River | 3.0 km | 30% | 71% |
| Pelican Lagoon | 3.7 km | 10% | 94% |
| Brown Beach | 4.6 km | 20% | 87% |
| Ballast Head | 5.1 km | 2% | 99% |
| Muston | 5.5 km | 4% | 96% |
| Baudin Beach | 6.2 km | 22% | 83% |
| Dudley West | 6.5 km | 0% | 100% |
| American Beach | 8.2 km | 14% | 93% |
| Kangaroo Head | 11.7 km | 2% | 99% |