St Mary flood map & planning overlays
A planning-constraint profile of St Mary
(Fraser Coast Regional, QLD) - 185.38 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
185.38 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to St Mary's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
St Mary at a glance
Schools in and near St Mary
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: 2.42 km from the suburb boundary
Secondary: 13.74 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 St Mary is zoned
Selling in St Mary? 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 185.38 km², St Mary is highly constrained by planning overlays. About 46% of the suburb sits within a mapped flood overlay, and 99% is flagged bushfire-prone. The dominant land-use zone is Rural. The median lot measures about 158,307 m² across 122 parcels.
Who lives in St Mary
Census 2021 figures published by the ABS for the St Mary 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 872, and decile 2 within Queensland. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Maryborough Surrounds - South, the wider ABS statistical area containing St Mary. There is no annual population series published at suburb level, so this describes the surrounding area rather than St Mary itself.
5,760 in 2001 to 11,170 in 2025, up 94%.
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 Mary 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 St Mary 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 St Mary. The free check tells you whether one reaches an address; where it does, a Flood Model Report is +$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 St Mary lot.
See what's in the $9 report →St Mary planning - frequently asked
Is St Mary flood-prone?
About 46% of St Mary falls within a mapped flood overlay, against the council-wide suburb average of 41%.
Is St Mary bushfire-prone?
Around 99% of St Mary is mapped as bushfire-prone, compared with a Fraser Coast Regional average of 68%.
What is the zoning in St Mary?
The dominant planning zone in St Mary is Rural.
Does St Mary have heritage-listed places?
No heritage-listed places are on record within St Mary.
What is the typical lot size in St Mary?
Across 122 surveyed parcels in St Mary, the median lot size is about 158,307 m². There are also 28 registered easements mapped in the suburb.
Is St Mary an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), St Mary scores 872 and sits in decile 1 of 10 nationally and decile 2 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Pioneers Rest | 7.3 km | 78% | 76% |
| Netherby | 9.4 km | 52% | 88% |
| Tiaro | 10.7 km | 51% | 76% |
| Antigua | 11.6 km | 83% | 86% |
| Yerra | 11.9 km | 44% | 54% |
| Thinoomba | 12.2 km | 46% | 92% |
| Owanyilla | 12.4 km | 55% | 86% |
| Pilerwa | 12.5 km | 29% | 66% |
| Mount Urah | 13.9 km | 50% | 80% |
| Mungar | 14.7 km | 45% | 86% |