Silky Oak flood map & planning overlays
91.2% flood-mapped with a median age of 39. Silky Oak, sitting low.
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 Silky Oak
(Cassowary Coast Regional, QLD) - 21.12 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 31 October 2026.
Constraint readout
21.12 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Silky Oak'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 Silky Oak
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 31 Oct 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.
Silky Oak at a glance
Schools in and near Silky Oak
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: 1.45 km from the suburb boundary
Secondary: 0.90 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 Silky Oak is zoned
Selling in Silky Oak? 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 21.12 km², Silky Oak is highly constrained by planning overlays. About 91% of the suburb sits within a mapped flood overlay, and 12% is flagged bushfire-prone. The dominant land-use zone is Rural. The median lot measures about 15,301 m² across 172 parcels.
Who lives in Silky Oak
Census 2021 figures published by the ABS for the Silky Oak 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 920, and decile 3 within Queensland. The national average is 1000.
Age profile
Share of Silky Oak's 178 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Tully, the wider ABS statistical area containing Silky Oak. There is no annual population series published at suburb level, so this describes the surrounding area rather than Silky Oak itself.
11,086 in 2001 to 11,867 in 2025, up 7%.
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.
Silky Oak 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 31 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 Silky Oak 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 Silky Oak. 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 the indicative soil reactivity range to expect for a Silky Oak lot.
Silky Oak planning - frequently asked
Is Silky Oak flood-prone?
About 91% of Silky Oak falls within a mapped flood overlay, against the council-wide suburb average of 66%. Published flood models are held over parts of Silky Oak; the free check on the Flood Model Report page says whether one reaches a given address.
Is Silky Oak bushfire-prone?
Around 12% of Silky Oak is mapped as bushfire-prone, compared with a Cassowary Coast Regional average of 16%.
Is Silky Oak under a flight path?
Aircraft were observed over about 14% of Silky Oak in the period sampled, but only above 3,000 ft - the lowest measured was 4,000 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 Silky Oak?
The dominant planning zone in Silky Oak is Rural, though the suburb also includes Environmental management and conservation and Township.
Does Silky Oak have heritage-listed places?
No heritage-listed places are on record within Silky Oak.
What is the typical lot size in Silky Oak?
Across 172 surveyed parcels in Silky Oak, the median lot size is about 15,301 m². There are also 18 registered easements mapped in the suburb.
What is the population of Silky Oak?
At the 2021 Census Silky Oak had 178 usual residents, with a median age of 39 and an average household size of 2.5 people. The wider Tully statistical area, which contains Silky Oak, went from 11,086 people in 2001 to 11,867 in 2025, up 7%.
Is Silky Oak an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Silky Oak scores 920 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 Silky Oak?
Median household income in Silky Oak was $1,343 a week at the 2021 Census, against $1,319 for the typical suburb in Cassowary Coast Regional. Median rent was $250 a week and the median mortgage repayment $1,148 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Tully | 4.3 km | 71% | 12% |
| Lower Tully | 6.2 km | 91% | 38% |
| Mount Mackay | 6.4 km | 24% | 32% |
| Euramo | 6.8 km | 100% | 8% |
| Birkalla | 6.8 km | 90% | 13% |
| Merryburn | 6.9 km | 67% | 48% |
| Midgenoo | 8.6 km | 95% | <1% |
| Bulgun | 9.1 km | 73% | 0% |
| Rockingham | 9.4 km | 84% | 43% |
| East Feluga | 9.9 km | 67% | 32% |