Cohuna flood map & planning overlays
Cohuna is Gannawarra's 2nd town, 2,415 people, with 94.2% Ramsar wetland overlay.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Cohuna
(Gannawarra, VIC) - 161.26 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 15 October 2026.
Constraint readout
161.26 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Cohuna's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Cohuna at a glance
How Cohuna is zoned
Selling in Cohuna? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 161.26 km², Cohuna is highly constrained by planning overlays. About 67% of the suburb sits within a mapped flood overlay, and 98% is flagged bushfire-prone. There are 4 heritage-listed sites on record, and the dominant land-use zone is Public Conservation and Resource Zone (PCRZ). The median lot measures about 1,012 m² across 1,882 parcels.
Who lives in Cohuna
Census 2021 figures published by the ABS for the Cohuna 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 923, and decile 2 within Victoria. The national average is 1000.
Age profile
Share of Cohuna's 2,415 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Gannawarra, the wider ABS statistical area containing Cohuna. There is no annual population series published at suburb level, so this describes the surrounding area rather than Cohuna itself.
7,625 in 2001 to 6,522 in 2025, down 14%.
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.
Cohuna 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 | Watched, not yet sampled here | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 15 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 Cohuna 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 →Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and the indicative soil reactivity range to expect for a Cohuna lot.
Cohuna planning - frequently asked
Is Cohuna flood-prone?
About 67% of Cohuna falls within a mapped flood overlay, against the council-wide suburb average of 52%.
Is Cohuna bushfire-prone?
Around 98% of Cohuna is mapped as bushfire-prone, compared with a Gannawarra average of 99%.
What is the zoning in Cohuna?
The dominant planning zone in Cohuna is Public Conservation and Resource Zone (PCRZ), though the suburb also includes Farming Zone (FZ) and General Residential Zone (GRZ1).
Does Cohuna have heritage-listed places?
Cohuna has 4 heritage-listed places on record.
What is the typical lot size in Cohuna?
Across 1,882 surveyed parcels in Cohuna, the median lot size is about 1,012 m². There are also 659 registered easements mapped in the suburb.
Does Cohuna have a train station?
There is no train station inside Cohuna itself. The suburb is served by 2 bus stops.
What is the population of Cohuna?
At the 2021 Census Cohuna had 2,415 usual residents, with a median age of 55 and an average household size of 2.1 people. The wider Gannawarra statistical area, which contains Cohuna, went from 7,625 people in 2001 to 6,522 in 2025, down 14%.
Is Cohuna an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Cohuna scores 923 and sits in decile 2 of 10 nationally and decile 2 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Cohuna?
Median household income in Cohuna was $1,112 a week at the 2021 Census, against $1,125 for the typical suburb in Gannawarra. Median rent was $185 a week and the median mortgage repayment $997 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Daltons Bridge | 6.0 km | 76% | 100% |
| Keely | 8.8 km | Not mapped | 100% |
| Burkes Bridge | 9.8 km | 93% | 100% |
| Wee Wee Rup | 9.9 km | 8% | 100% |
| Cullen | 9.9 km | 3% | 100% |
| Gannawarra | 12.5 km | 10% | 100% |
| Mcmillans | 12.6 km | 9% | 100% |
| Mead | 13.1 km | 22% | 100% |
| Horfield | 13.6 km | 25% | 100% |
| Leitchville | 15.9 km | 52% | 100% |