Mount Ossa flood map & planning overlays
A planning-constraint profile of Mount Ossa
(Mackay Regional, QLD) - 111.39 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 19 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
111.39 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Mount Ossa's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
How common is mapped flood risk across Mount Ossa properties?
Overlay percentages say how much land is constrained; these figures say how many properties are actually touched in a suburb-wide analysis of 270 Mount Ossa properties. No individual property result is identified on this page.
Lot-level readout
Flood-risk rating across all 270 properties
From LayeredGeo's lot-risk engine: council flood overlays, historical flooding and terrain, resolved to each individual lot in Mount Ossa.
Mount Ossa at a glance
Schools in and near Mount Ossa
Public school-location data shows availability across the suburb. These figures do not rate schools and do not assign a particular address to a catchment.
Inside the suburb boundary
0 schools providing primary years and 0 providing secondary years. A combined school may be counted in both teaching levels.
Nearest school availability
Primary: 5.84 km from the suburb boundary
Secondary: 5.84 km from the suburb boundary
Source: Queensland Government school geographic information. Catchment boundaries can divide a suburb and change over time; use the official catchment finder for a specific address.
How Mount Ossa is zoned
Selling in Mount Ossa? The lot-level zone is the zoning Part 3 of Queensland's Form 2 seller disclosure statement asks for - see our Form 2 planning data guide.
Across its 111.39 km², Mount Ossa is highly constrained by planning overlays. About 9% of the suburb sits within a mapped flood overlay, and 44% is flagged bushfire-prone. The dominant land-use zone is Rural. The terrain is largely flat, and the median lot measures about 169,397 m² across 297 parcels.
Who lives in Mount Ossa
Census 2021 figures published by the ABS for the Mount Ossa 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 966, and decile 6 within Queensland. The national average is 1000.
Age profile
Share of Mount Ossa's 250 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Seaforth - Calen, the wider ABS statistical area containing Mount Ossa. There is no annual population series published at suburb level, so this describes the surrounding area rather than Mount Ossa itself.
7,079 in 2001 to 8,785 in 2025, up 24%.
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 Ossa 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 relevant council planning scheme and Queensland Government spatial data |
| Bushfire-prone mapping | Mapped | the relevant council planning scheme and Queensland Government spatial data |
| Zoning | Mapped | the relevant council planning scheme and Queensland Government spatial data |
| Heritage and environment | Mapped where published | the relevant council planning scheme and Queensland Government spatial data |
| Aircraft noise contours (ANEF) | Not held | the relevant council planning scheme and Queensland Government spatial data, Defence |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
| School availability | Available | Queensland Government |
Profile last materially updated 19 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 Ossa 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.
Published flood models are held over parts of Mount Ossa. The free check tells you whether one reaches an address; where it does, a Flood Model Report is +$9 with the planning report.
The Terrain Report shows the fall of the block - contours, cross sections and a 3D model of the lot (+$9 with the planning report).
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Mount Ossa lot.
See what's in the $9 report →Mount Ossa planning - frequently asked
Is Mount Ossa flood-prone?
About 9% of Mount Ossa falls within a mapped flood overlay, against the council-wide suburb average of 34%. Across the suburb, 31% of the 270 properties we analysed carry some level of mapped flood risk, including 83 rated high risk or historically affected.
Is Mount Ossa bushfire-prone?
Around 44% of Mount Ossa is mapped as bushfire-prone, compared with a Mackay Regional average of 26%.
What is the zoning in Mount Ossa?
The dominant planning zone in Mount Ossa is Rural, though the suburb also includes Conservation and Open space.
Does Mount Ossa have heritage-listed places?
No heritage-listed places are on record within Mount Ossa.
Is Mount Ossa hilly or flat?
Mount Ossa is largely flat: the median ground slope is about 4%, and 20% of measured points sit on grades of 15% or steeper. Ground level runs from roughly 3 m to 137 m AHD across the suburb.
What is the typical lot size in Mount Ossa?
Across 297 surveyed parcels in Mount Ossa, the median lot size is about 169,397 m². There are also 9 registered easements mapped in the suburb.
What is the population of Mount Ossa?
At the 2021 Census Mount Ossa had 250 usual residents, with a median age of 42 and an average household size of 2.8 people. The wider Seaforth - Calen statistical area, which contains Mount Ossa, went from 7,079 people in 2001 to 8,785 in 2025, up 24%.
Is Mount Ossa an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Mount Ossa scores 966 and sits in decile 4 of 10 nationally and decile 6 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Mount Ossa?
Median household income in Mount Ossa was $1,770 a week at the 2021 Census, against $1,937 for the typical suburb in Mackay Regional. Median rent was $228 a week and the median mortgage repayment $1,451 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Mount Pelion | 6.4 km | 9% | 37% |
| Kuttabul | 9.2 km | <1% | 53% |
| Mount Charlton | 9.2 km | 0% | 48% |
| Seaforth | 12.7 km | 21% | 44% |
| Calen | 13.1 km | 3% | 35% |
| Mount Martin | 13.5 km | 0% | 34% |
| Mount Jukes | 14.0 km | 24% | 42% |
| Dows Creek | 14.9 km | 0% | 34% |
| St Helens Beach | 15.2 km | 32% | 19% |
| Devereux Creek | 15.3 km | 12% | 62% |