Diglum flood map & planning overlays
98 ha is the typical Diglum lot, 4th-largest in Gladstone Regional.
Things you won't regret: spending $9 to know the lot before you commit.
Free map preview, then PDF reports from $9 - about the price of an iced latte on a public holiday.
A planning-constraint profile of Diglum
(Gladstone Regional, QLD) - 375.94 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 7 November 2026.
Constraint readout
375.94 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Diglum's boundary, with the flood, bushfire and environmental overlays drawn on top. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Diglum
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 4 Sep to 7 Nov 2026
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.
Diglum at a glance
Schools in and near Diglum
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: 12.48 km from the suburb boundary
Secondary: 15.22 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 Diglum address in? Check an address with our free school zone checker.
How Diglum is zoned
Selling in Diglum? 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 375.94 km², Diglum is highly constrained by planning overlays. About 32% of the suburb sits within a mapped flood overlay, and 89% is flagged bushfire-prone. The dominant land-use zone is Rural. The median lot measures about 981,204 m² across 203 parcels.
Who lives in Diglum
Census 2021 figures published by the ABS for the Diglum 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 914, and decile 3 within Queensland. The national average is 1000.
Age profile
Share of Diglum's 56 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Gladstone Hinterland, the wider ABS statistical area containing Diglum. There is no annual population series published at suburb level, so this describes the surrounding area rather than Diglum itself.
6,952 in 2001 to 12,274 in 2025, up 77%.
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.
Diglum 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 |
| 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 |
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 Diglum 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 →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 Diglum. The free check tells you whether one reaches an address; where it does, a Flood Model Report is +$9 with the planning report.
Moving here? The Liveability section adds walking times from the address to schools, parks, shops and transport, and the school zones it sits in (+$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 Diglum lot.
Diglum planning - frequently asked
Is Diglum flood-prone?
About 32% of Diglum falls within a mapped flood overlay, against the council-wide suburb average of 48%. Published flood models are held over parts of Diglum; the free check on the Flood Model Report page says whether one reaches a given address.
Is Diglum bushfire-prone?
Around 89% of Diglum is mapped as bushfire-prone, compared with a Gladstone Regional average of 64%.
Is Diglum under a flight path?
Aircraft were observed over about 6% of Diglum in the period sampled, but only above 3,000 ft - the lowest measured was 3,000 ft. 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 Diglum?
The dominant planning zone in Diglum is Rural, though the suburb also includes Conservation and Special Purpose.
Does Diglum have heritage-listed places?
No heritage-listed places are on record within Diglum.
What is the typical lot size in Diglum?
Across 203 surveyed parcels in Diglum, the median lot size is about 981,204 m². There are also 5 registered easements mapped in the suburb.
What is the population of Diglum?
At the 2021 Census Diglum had 56 usual residents, with a median age of 45 and an average household size of 3.1 people. The wider Gladstone Hinterland statistical area, which contains Diglum, went from 6,952 people in 2001 to 12,274 in 2025, up 77%.
Is Diglum an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Diglum scores 914 and sits in decile 2 of 10 nationally and decile 3 within Queensland (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Diglum?
Median household income in Diglum was $1,833 a week at the 2021 Census, against $1,361 for the typical suburb in Gladstone Regional. Median rent was $300 a week and the median mortgage repayment $4,333 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Wooderson | 16.6 km | 37% | 80% |
| Tablelands | 21.3 km | 21% | 98% |
| Boynedale | 21.5 km | 37% | 86% |
| Taragoola | 22.4 km | 49% | 66% |
| Calliope | 24.4 km | 41% | 73% |
| Mount Alma | 25.7 km | 50% | 53% |
| River Ranch | 31.1 km | 82% | 84% |
| Benaraby | 32.5 km | 57% | 76% |
| Valentine Plains Banana Shire |
33.0 km | 33% | 72% |
| Boyne Valley | 33.1 km | 34% | 92% |