Mount St John flood map & planning overlays
35% of Mount St John sits inside aircraft noise contours, 7th in Townsville.
Most lots here are flood-mapped. The free check shows how much of one lot the overlay covers.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Mount St John
(Townsville City, QLD) - 6.18 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 7 November 2026.
Constraint readout
6.18 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Mount St John's boundary, with the flood, bushfire and environmental overlays drawn on top. Amber hatching is the published aircraft noise (ANEF) contour. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft.
Nearby suburbs, nearest first
How common is mapped flood risk across Mount St John properties?
Counts of properties, not share of land, across 276 analysed Mount St John properties; no individual property result is identified.
Lot-level readout
Flood-risk rating across all 276 properties
From LayeredGeo's lot-risk engine: council flood overlays, historical flooding and terrain, resolved to each individual lot in Mount St John.
Aircraft noise and flight paths over Mount St John
The ANEF contour is a published planning forecast and observed overflight is what a sampled tracking feed recorded - neither describes any individual property.
Inside an aircraft noise contour
35% of the suburb's land sits inside a published ANEF or airport-environs contour. Contours vary street by street, so whether a particular lot is inside one needs a property-level check.
Highest contour present
Under AS 2021, land at ANEF 30 and above is generally unacceptable for new houses and most noise-sensitive uses. The contour is a forecast, not a measurement at any one house.
Contours held
- Defence Airfields ANEF
- Townsville City Council ANEF
Observed overflight - sampled 4 Sep to 7 Nov 2026
typical observed square 5 a day
Night movements: observed, lowest 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.
Mount St John at a glance
Schools in and near Mount St John
Public school-location data shows availability across the suburb; it does not rate schools or assign any individual 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: 0.93 km from the suburb boundary
Secondary: 0.93 km from the suburb boundary
Source: Queensland Government school geographic information. Catchment boundaries can divide a suburb and change over time.
Which school zone is a Mount St John address in? Check an address with our free school zone checker.
How Mount St John is zoned
Selling in Mount St John? 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 6.18 km², Mount St John is highly constrained by planning overlays. About 100% of the suburb sits within a mapped flood overlay, and 5% is flagged bushfire-prone. There are 2 heritage-listed sites on record, and the dominant land-use zone is Medium Impact Industry. The terrain is largely flat, and the median lot measures about 4,115 m² across 293 parcels.
Recent development applications in Mount St John
Applications are counted across the whole gazetted suburb from the public Townsville City Council register. No application address or individual property is published here.
Submitted in the past 12 months
Latest included submission: 9 September 2026.
Previous 12 months: 23 (17% lower in the latest period).
Common application types
- Material change of use: 5
Counts depend on applications that the council publishes and that can be assigned to a suburb. Categories can overlap when one application covers several types. Totals below five and their latest dates are suppressed. Register last synchronised 8 November 2026. Check the official council register.
Who lives in Mount St John
Census 2021 figures published by the ABS for the Mount St John 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 952, and decile 5 within Queensland. The national average is 1000.
Age profile
Share of Mount St John's 103 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Mount Louisa, the wider ABS statistical area containing Mount St John. There is no annual population series published at suburb level, so this describes the surrounding area rather than Mount St John itself.
4,046 in 2001 to 10,932 in 2025, up 170%.
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 St John 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) | Inside a held contour | the relevant council planning scheme and Queensland Government spatial data, Defence |
| Observed flight paths | Observed | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
| School availability | Available | Queensland Government |
| Development applications | Available as suburb totals | Townsville City Council |
Profile last materially updated 7 November 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 St John 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 100% of Mount St John. The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Published flood models are held over parts of Mount St John. 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 to spin round in your browser (+$9 with the planning 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 Mount St John lot.
Mount St John planning - frequently asked
Is Mount St John flood-prone?
About 100% of Mount St John falls within a mapped flood overlay, against the council-wide suburb average of 57%. Across the suburb, 0% of the 276 properties we analysed carry some level of mapped flood risk. Published flood models are held over parts of Mount St John; the free check on the Flood Model Report page says whether one reaches a given address.
Is Mount St John bushfire-prone?
Around 5% of Mount St John is mapped as bushfire-prone, compared with a Townsville City average of 50%.
Is Mount St John affected by aircraft noise?
About 35% of Mount St John sits inside a published aircraft noise contour, and the highest contour present is ANEF 40 - under AS 2021, land above ANEF 25 is generally considered unacceptable for new houses, and 20-25 conditionally acceptable with noise attenuation. ANEF contours are forecasts published per airport and used to control noise-sensitive development; they are not a measurement at any one house, and a property can sit under a flight path and outside every contour.
Is Mount St John under a flight path?
Aircraft were observed below 3,000 ft over about 100% of Mount St John, in the period sampled (4 Sep 2026 to 7 Nov 2026). The lowest measured aircraft was at 500 ft, with an average of 500 ft. At the busiest point in the suburb about 30 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 Mount St John?
The dominant planning zone in Mount St John is Medium Impact Industry, though the suburb also includes Specialised Centre and Conservation.
Does Mount St John have heritage-listed places?
Mount St John has 2 heritage-listed places on record.
Is Mount St John hilly or flat?
Mount St John is largely flat: the median ground slope is about 1%. Ground level runs from roughly 3 m to 6 m AHD across the suburb.
What is the typical lot size in Mount St John?
Across 293 surveyed parcels in Mount St John, the median lot size is about 4,115 m². There are also 78 registered easements mapped in the suburb.
Does Mount St John have a train station?
There is no train station inside Mount St John itself. The suburb is served by 2 bus stops.
What is the population of Mount St John?
At the 2021 Census Mount St John had 103 usual residents, with a median age of 42 and an average household size of 1.4 people. The wider Mount Louisa statistical area, which contains Mount St John, went from 4,046 people in 2001 to 10,932 in 2025, up 170%.
Is Mount St John an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Mount St John scores 952 and sits in decile 4 of 10 nationally and decile 5 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Mount St John?
Median household income in Mount St John was $949 a week at the 2021 Census, against $1,510 for the typical suburb in Townsville City. Median rent was $205 a week.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Bohle | 1.7 km | 100% | 16% |
| Mount Louisa | 3.3 km | 63% | 45% |
| Garbutt | 3.4 km | 100% | 5% |
| Town Common | 3.6 km | 90% | 40% |
| Cosgrove | 4.0 km | 50% | 78% |
| Rowes Bay | 4.6 km | 100% | 36% |
| Vincent | 4.7 km | 91% | 0% |
| Burdell | 4.9 km | 97% | 36% |
| Currajong | 5.1 km | 100% | 0% |
| Shaw | 5.2 km | 66% | 88% |