Marion Bay flood map & planning overlays

A planning-constraint profile of Marion Bay (Yorke Peninsula Council, SA) - 301.26 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.

Planning schematicMarion Bay

Constraint readout

301.26 km² - this suburb is highly constrained by planning overlays.

Flood overlay 0%

below council avg (1%) · #7 of 60 mapped council suburbs

Bushfire-prone 100%

≈ council avg (93%) · #19 of 60 mapped council suburbs

Environmental69%

3.5× council avg (20%) · #5 of 60 in council

Heritage sites 1 Mostly Rural Bushfire 19th most affected of 60 →

Elevation hillshade with street names, clipped to Marion Bay'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 Marion Bay

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

Under observed aircraft

of the suburb, at or below 10,000 ft

Below 3,000 ft

of the suburb's area

Lowest measured

1,000 ft

averaging 4,500 ft

How often

not established

aircraft were seen, but not often enough to put a rate on

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.

Marion Bay at a glance

Parcels 637 Median lot 835 m² Bus stops 1

How Marion Bay is zoned

Rural 80%

Conservation 19%

Coastal Waters and Offshore Islands 0%

Rural Living 0%

Rural Settlement 0%

Open Space 0%

Selling in Marion Bay? 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 301.26 km², Marion Bay is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 100% is flagged bushfire-prone. There is 1 heritage-listed site on record, and the dominant land-use zone is Rural. The median lot measures about 835 m² across 637 parcels.

Who lives in Marion Bay

Census 2021 figures published by the ABS for the Marion Bay suburb boundary itself, not a wider region.

Population

210

usual residents, 2021

Median age

years

Median household income

$838

per week, Yorke Peninsula Council suburb typical $937

Median rent

$200

per week, Yorke Peninsula Council suburb typical $200

Median mortgage

$867

per month

Household size

2.0

people, average

Socio-economic standing

ABS SEIFA 2021 ranks every Australian suburb. Decile 1 is the most disadvantaged tenth of the country, decile 10 the least.

Advantage and disadvantage (IRSAD) Decile 1

most disadvantagedleast disadvantaged

Score 883, and decile 1 within South Australia. The national average is 1000.

Relative disadvantage (IRSD) Decile 2

most disadvantagedleast disadvantaged

Age profile

Share of Marion Bay's 210 residents in each ABS age band.

0-4 1.5%

5-14 9.4%

15-19 5.4%

20-24 3.9%

25-34 9.4%

35-44 10.8%

45-54 12.3%

55-64 30.5%

65-74 10.8%

75-84 5.9%

85+ 0.0%

Population trend, 2001 to 2025

Estimated resident population of Yorke Peninsula - South, the wider ABS statistical area containing Marion Bay. There is no annual population series published at suburb level, so this describes the surrounding area rather than Marion Bay itself.

4,171 in 2001 to 4,489 in 2025, up 8%.

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.

Marion Bay 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 Marion Bay 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 Marion Bay lot.

See what's in the $9 report →

Marion Bay planning - frequently asked

Is Marion Bay flood-prone?

Flood mapping covers Marion Bay and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 1%).

Is Marion Bay bushfire-prone?

Around 100% of Marion Bay is mapped as bushfire-prone, compared with a Yorke Peninsula Council average of 93%.

Is Marion Bay under a flight path?

Aircraft were observed over about 4% of Marion Bay in the period sampled, but only above 3,000 ft - the lowest measured was 1,000 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 Marion Bay?

The dominant planning zone in Marion Bay is Rural, though the suburb also includes Conservation and Coastal Waters and Offshore Islands.

Does Marion Bay have heritage-listed places?

Marion Bay has 1 heritage-listed place on record.

What is the typical lot size in Marion Bay?

Across 637 surveyed parcels in Marion Bay, the median lot size is about 835 m².

Does Marion Bay have a train station?

There is no train station inside Marion Bay itself. The suburb is served by 1 bus stop.

What is the population of Marion Bay?

At the 2021 Census Marion Bay had 210 usual residents, with a median age of 54 and an average household size of 2.0 people. The wider Yorke Peninsula - South statistical area, which contains Marion Bay, went from 4,171 people in 2001 to 4,489 in 2025, up 8%.

Is Marion Bay an advantaged suburb?

On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Marion Bay scores 883 and sits in decile 1 of 10 nationally and decile 1 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).

What is the median household income in Marion Bay?

Median household income in Marion Bay was $838 a week at the 2021 Census, against $937 for the typical suburb in Yorke Peninsula Council. Median rent was $200 a week and the median mortgage repayment $867 a month.

Compare nearby suburbs

Nearby suburb	Distance	Flood mapped	Bushfire-prone
Inneston	12.6 km	0%	99%
White Hut	14.4 km	0%	100%
Foul Bay	20.0 km	0%	99%
Corny Point	24.4 km	0%	97%
The Pines	29.7 km	0%	96%
Warooka	31.1 km	0%	100%
Couch Beach	32.0 km	0%	66%
Point Souttar	34.1 km	0%	98%
Point Turton	38.0 km	0%	88%
Port Moorowie	46.4 km	0%	97%

See all Yorke Peninsula Council suburb profiles →