Thornlie
WAThornlie is a growing suburb in WA with 23,665 residents.
- SAL code
- 51448
- SA2
- 506041137
- Population
- 23,665
- LGA
- Gosnells
Thornlie, WA had 23,665 residents at the 2021 Census, with the broader statistical area showing a 6.4% growth over the last five years. The predominant age group is 35-44 years, and the median age sits at 38. Households are most often couples with children, and those with a mortgage repay a median of $1,625 a month. Around 78.2% of homes are owner-occupied, with the largest single tenure being owned with a mortgage at 43.9%. Most dwellings are separate houses, making up 91.3% of the suburb's housing stock. The suburb has 51 parks and reserves mapped within its boundary. Source: ABS Census 2021 and Estimated Resident Population, with amenity counts from state Open Data and OpenStreetMap.
Population
?23,665
Suburb · Census 2021
5-Year Growth
+6.4%
3yr: +5.1% · 10yr: +6.6%
SA2 · 5yr
Household Income
$1,571/wk
Suburb · Census 2021 median
Median Age
38
Suburb · Census 2021
Socio-Economic Index
?4/10
SA2 · middle-range
Unemployment
?6.2%
SA4 · Q4 2025
Schools
7
6 primary, 1 secondary
Hospitals
No data for this suburb
Childcare services
?13
8 long day, 5 OSHC
Parks & green space
?51
Parks, reserves
Transport stops
?116
GTFS stops
Dwelling approvals
?41
Gosnells · Feb 2026
Median Weekly Rent
Based on rental bond lodgements recorded by the state government.
Median House Sale Price
state Valuer-General sale price data not yet loaded for WA
Safety & Crime
2025 Q4Reported incidents from WA police. Offence rates may not reflect all crime.
Population over time — Thornlie (SA2)
ABS publishes annual estimates only at SA2; Thornlie suburb alone is ~23,665 (Census 2021).
Growth at a Glance
Population grew from 23,768 to 25,963 over 24 years, averaging 0.4% per year.
Schools
7 in suburbGovernment school catchment
Catchment data is not yet available for WA.
Source when available: WA Department of Education — Public School Local-Intake Areas.
Profile
Census snapshot
Housing
Public housing 2.0%Almost entirely detached houses (91.3%), owner-occupied (78%), built for families (46% are 4 bed).
Dwelling mix
Tenure
Number of bedrooms
Bushfire & flood risk
Bushfire
Source: WA DFES Bush Fire Prone Areas
As of Apr 2026
Flood
Hazard data is not yet available for this state.
Overlap is the percentage of the suburb's land area inside the mapped hazard polygons. Always verify the exact property address with the relevant authority before making decisions.
Planning zones
Planning-zone data is not yet available for WA.
Source when available: Landgate / WA Department of Planning, Lands and Heritage.