St Arnaud flood map & planning overlays
St Arnaud is Northern Grampians' 2nd town, 2,318 people, with 35 heritage places.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of St Arnaud
(Northern Grampians, VIC) - 70.02 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 25 October 2026.
Constraint readout
70.02 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to St Arnaud's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over St Arnaud
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 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.
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.
St Arnaud at a glance
How St Arnaud is zoned
Selling in St Arnaud? The zoning and planning overlays on this page are the controls a Section 32 vendor statement discloses.
Across its 70.02 km², St Arnaud is highly constrained by planning overlays. About 11% of the suburb sits within a mapped flood overlay, and 99% is flagged bushfire-prone. There are 35 heritage-listed sites on record, and the dominant land-use zone is Public Conservation and Resource Zone (PCRZ). The median lot measures about 1,017 m² across 2,589 parcels.
Who lives in St Arnaud
Census 2021 figures published by the ABS for the St Arnaud 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 892, and decile 1 within Victoria. The national average is 1000.
Age profile
Share of St Arnaud's 2,318 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of St Arnaud, the wider ABS statistical area containing St Arnaud. There is no annual population series published at suburb level, so this describes the surrounding area rather than St Arnaud itself.
4,075 in 2001 to 3,394 in 2025, down 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.
St Arnaud 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 25 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 St Arnaud 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 St Arnaud lot.
St Arnaud planning - frequently asked
Is St Arnaud flood-prone?
About 11% of St Arnaud falls within a mapped flood overlay, against the council-wide suburb average of 27%.
Is St Arnaud bushfire-prone?
Around 99% of St Arnaud is mapped as bushfire-prone, compared with a Northern Grampians average of 100%.
Is St Arnaud under a flight path?
No aircraft were observed over St Arnaud 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 St Arnaud?
The dominant planning zone in St Arnaud is Public Conservation and Resource Zone (PCRZ), though the suburb also includes Farming Zone (FZ) and Rural Living Zone (RLZ2).
Does St Arnaud have heritage-listed places?
St Arnaud has 35 heritage-listed places on record.
What is the typical lot size in St Arnaud?
Across 2,589 surveyed parcels in St Arnaud, the median lot size is about 1,017 m². There are also 49 registered easements mapped in the suburb.
Does St Arnaud have a train station?
There is no train station inside St Arnaud itself. The suburb is served by 3 bus stops.
What is the population of St Arnaud?
At the 2021 Census St Arnaud had 2,318 usual residents, with a median age of 52 and an average household size of 2.0 people. The wider St Arnaud statistical area, which contains St Arnaud, went from 4,075 people in 2001 to 3,394 in 2025, down 17%.
Is St Arnaud an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), St Arnaud scores 892 and sits in decile 2 of 10 nationally and decile 1 within Victoria (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in St Arnaud?
Median household income in St Arnaud was $920 a week at the 2021 Census, against $1,296 for the typical suburb in Northern Grampians. Median rent was $188 a week and the median mortgage repayment $867 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Moolerr | 6.5 km | 13% | 100% |
| St Arnaud North | 7.2 km | 11% | 100% |
| St Arnaud East | 7.6 km | 4% | 100% |
| Carapooee West | 9.5 km | 7% | 100% |
| Sutherland | 10.4 km | 21% | 100% |
| Slaty Creek | 11.0 km | 21% | 100% |
| Beazleys Bridge | 12.3 km | 16% | 100% |
| Carapooee | 13.9 km | 24% | 100% |
| Gre Gre | 14.2 km | 20% | 100% |
| Kooreh | 14.5 km | 41% | 100% |