Corunnun flood map & planning overlays
Corunnun keeps 4 ha farms with total bushfire cover, home to a median of 44.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Corunnun
(Colac Otway, VIC) - 16.75 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 24 October 2026.
Constraint readout
16.75 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Corunnun'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 Corunnun
The ANEF contour is a published planning forecast and observed overflight is what a sampled tracking feed recorded - neither describes any individual property.
Observed overflight - sampled 4 Sep to 24 Oct 2026
typical observed square 0 a day
Night movements: observed, lowest 1,500 ft - night is sampled as often as day, but night traffic is light, so this is a floor and no rate can be put on it.
How this is measured
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.
Corunnun at a glance
How Corunnun is zoned
Selling in Corunnun? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 16.75 km², Corunnun is highly constrained by planning overlays. About 10% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. There are 3 heritage-listed sites on record, and the dominant land-use zone is Farming Zone (FZ). The median lot measures about 38,572 m² across 202 parcels.
Who lives in Corunnun
Census 2021 figures published by the ABS for the Corunnun 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 955, and decile 3 within Victoria. The national average is 1000.
Age profile
Share of Corunnun's 119 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Colac Surrounds, the wider ABS statistical area containing Corunnun. There is no annual population series published at suburb level, so this describes the surrounding area rather than Corunnun itself.
5,829 in 2001 to 5,670 in 2025, down 3%.
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.
Corunnun 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 | Vicmap Planning and Victorian Government spatial services |
| Bushfire-prone mapping | Mapped | Vicmap Planning and Victorian Government spatial services |
| Zoning | Mapped | Vicmap Planning and Victorian Government spatial services |
| Heritage and environment | Mapped where published | Vicmap Planning and Victorian Government spatial services |
| Aircraft noise contours (ANEF) | Not held | Vicmap Planning and Victorian Government spatial services, 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 24 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 Corunnun 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.
See what's in the $9 report →Aircraft have been seen below 3,000 ft over about 27% of Corunnun. 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 the indicative soil reactivity range to expect for a Corunnun lot.
Corunnun planning - frequently asked
Is Corunnun flood-prone?
About 10% of Corunnun falls within a mapped flood overlay, against the council-wide suburb average of 12%.
Is Corunnun bushfire-prone?
Around 100% of Corunnun is mapped as bushfire-prone, compared with a Colac Otway average of 97%.
Is Corunnun under a flight path?
Aircraft were observed below 3,000 ft over about 27% of Corunnun, and over about 62% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 24 Oct 2026). The lowest measured aircraft was at 1,500 ft, with an average of 4,000 ft. At the busiest point in the suburb about 1 aircraft a day were recorded passing over one 500 m square. 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 Corunnun?
The dominant planning zone in Corunnun is Farming Zone (FZ), though the suburb also includes Public Conservation and Resource Zone (PCRZ) and Township Zone (TZ).
Does Corunnun have heritage-listed places?
Corunnun has 3 heritage-listed places on record.
What is the typical lot size in Corunnun?
Across 202 surveyed parcels in Corunnun, the median lot size is about 38,572 m². There are also 76 registered easements mapped in the suburb.
Does Corunnun have a train station?
There is no train station inside Corunnun itself. The suburb is served by 1 bus stop.
What is the population of Corunnun?
At the 2021 Census Corunnun had 119 usual residents, with a median age of 44 and an average household size of 2.7 people. The wider Colac Surrounds statistical area, which contains Corunnun, went from 5,829 people in 2001 to 5,670 in 2025, down 3%.
Is Corunnun an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Corunnun scores 955 and sits in decile 4 of 10 nationally and decile 3 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Corunnun?
Median household income in Corunnun was $1,687 a week at the 2021 Census, against $1,443 for the typical suburb in Colac Otway. Median rent was $140 a week and the median mortgage repayment $1,517 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Cororooke | 4.0 km | 2% | 100% |
| Coragulac | 5.0 km | <1% | 100% |
| Alvie | 5.1 km | 16% | 92% |
| Nalangil | 5.7 km | 25% | 98% |
| Balintore | 7.2 km | 26% | 100% |
| Colac West | 7.5 km | 10% | 98% |
| Larpent | 8.0 km | 11% | 100% |
| Warrion | 8.3 km | <1% | 100% |
| Pomborneit East Corangamite |
8.4 km | 60% | 57% |
| Colac | 9.3 km | 78% | 15% |