Mount Gambier flood map & planning overlays
A planning-constraint profile of Mount Gambier
(City of Mount Gambier, SA) - 26.79 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 12 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
26.79 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Mount Gambier's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Mount Gambier
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 to
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.
Mount Gambier at a glance
How Mount Gambier is zoned
Selling in Mount Gambier? 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 26.79 km², Mount Gambier is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 41% is flagged bushfire-prone. There are 176 heritage-listed sites on record, and the dominant land-use zone is Suburban Neighbourhood. The median lot measures about 760 m² across 13,796 parcels.
Who lives in Mount Gambier
Census 2021 figures published by the ABS for the Mount Gambier 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 887, and decile 1 within South Australia. The national average is 1000.
Age profile
Share of Mount Gambier's 25,591 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Mount Gambier - West, the wider ABS statistical area containing Mount Gambier. There is no annual population series published at suburb level, so this describes the surrounding area rather than Mount Gambier itself.
13,047 in 2001 to 15,284 in 2025, up 17%.
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.
Mount Gambier 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 12 September 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 Mount Gambier 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.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Mount Gambier lot.
See what's in the $9 report →Mount Gambier planning - frequently asked
Is Mount Gambier flood-prone?
Flood mapping covers Mount Gambier and none of the suburb falls within a mapped flood overlay.
Is Mount Gambier bushfire-prone?
Around 41% of Mount Gambier is mapped as bushfire-prone, compared with a City of Mount Gambier average of 41%.
Is Mount Gambier under a flight path?
No aircraft were observed over Mount Gambier in the period sampled (recent weeks to now). Sampling is intermittent, so that is a floor rather than proof that none fly over. 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 Mount Gambier?
The dominant planning zone in Mount Gambier is Suburban Neighbourhood, though the suburb also includes Conservation and Strategic Employment.
Does Mount Gambier have heritage-listed places?
Mount Gambier has 176 heritage-listed places on record.
What is the typical lot size in Mount Gambier?
Across 13,796 surveyed parcels in Mount Gambier, the median lot size is about 760 m².
Does Mount Gambier have a train station?
There is no train station inside Mount Gambier itself. The suburb is served by 120 bus stops.
What is the population of Mount Gambier?
At the 2021 Census Mount Gambier had 25,591 usual residents, with a median age of 41 and an average household size of 2.2 people. The wider Mount Gambier - West statistical area, which contains Mount Gambier, went from 13,047 people in 2001 to 15,284 in 2025, up 17%.
Is Mount Gambier an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Mount Gambier scores 887 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 Mount Gambier?
Median household income in Mount Gambier was $1,197 a week at the 2021 Census, against $1,197 for the typical suburb in City of Mount Gambier. Median rent was $220 a week and the median mortgage repayment $1,083 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Worrolong Southern Limestone Coast Council |
5.1 km | 0% | 98% |
| Suttontown Southern Limestone Coast Council |
5.3 km | 0% | 96% |
| Square Mile Southern Limestone Coast Council |
5.3 km | 0% | 100% |
| Ob Flat Southern Limestone Coast Council |
6.2 km | 0% | 100% |
| Yahl Southern Limestone Coast Council |
8.5 km | 0% | 100% |
| Mil-Lel Southern Limestone Coast Council |
9.0 km | 0% | 100% |
| Compton Southern Limestone Coast Council |
9.0 km | 0% | 100% |
| Moorak Southern Limestone Coast Council |
9.6 km | 0% | 100% |
| Wandilo Southern Limestone Coast Council |
10.8 km | 0% | 100% |
| Glenburnie Southern Limestone Coast Council |
12.0 km | 0% | 100% |