Suburb report · WA 6108
Thornlie
Prepared by the property strategists at Chase Wealth Australia
Compare with
Investment Score
Enter your details to see this suburb's Investment Score, medians, yields and growth.
Population
24,990
Thornlie suburb profile
Who lives in Thornlie
Thornlie sits 14km from the Perth CBD, in the middle ring of the capital. Thornlie is home to 24,990 people, a scale matched by fewer than 1% of Western Australian suburbs. By population it is number 4 of 270 suburbs within 40km of the Perth CBD. At 38, the median age sits in the middle of the Western Australian range, older than 41% of suburbs. Among suburbs within 40km of the Perth CBD, 139 of 270 have an older median age.
Income and home ownership
Households earn a median $89,900 a year, at the 31st percentile for Western Australia. Among the 270 suburbs within 40km of the Perth CBD, 216 report a higher median household income. Ownership is above the state norm at 78.2%, against 75.2% in the median Western Australian suburb. 123 of the 270 suburbs within 40km of the Perth CBD have a higher ownership share.
Household mix
At the 2021 Census, 8,401 households lived in Thornlie, more than in 99% of Western Australian suburbs. The household mix leans to families: families with children 49.4%, couples without children 26.9%, people living alone 21% and group households 2.8%. Among suburbs within 40km of the Perth CBD, 168 of 270 have a smaller share of families with children than Thornlie. At 49.4%, families with children are more common here than in 69% of Western Australian suburbs. Couples without children, at 26.9%, sit near the Western Australian middle, at the 45th percentile.
Housing supply
33 new dwellings were approved across the Thornlie statistical area in the year to June 2025, in line with its 2020 to 2024 average of 32 a year. The Thornlie statistical area had 25,963 residents in 2025 and closely matches Thornlie. That is 1.3 approvals per 1,000 residents of that area, a lighter pipeline than 90% of Western Australian statistical areas. Over the 6 years to June 2025, annual approvals ranged from 14 in 2023 to 52 in 2021.
Population trend
From 2020 to 2025, the Thornlie statistical area added 6.4% to its population, against 12.3% for Western Australia as a whole. Over those 5 years a typical Western Australian statistical area added 9.7%, putting this area 3.3 points behind. That rate is faster than 25% of Western Australian statistical areas. The fastest single year was to 2023, at 2.8%, and the slowest to 2022, at 0.4%.
Against its neighbours
The sharpest contrast among the nearby suburbs is Gosnells, where the share of people living alone is 31.7% compared with 21% here. On the share of families with children, Maddington comes closest to Thornlie: 48.9% against 49.4%. At 4km, Huntingdale counts 10,430 residents against 24,990 in Thornlie.
Location
Demographics
ABS Data by Region to 2025, on ABS Census 2021 suburb baselineHousehold Mix Census 2021
Growth Projection Calculator
Projections for Thornlie load with the full report once your details are in.
Similar Suburbs
Reading this report
Every figure in the Thornlie data table is dated at its source. Supply and population change cover the Thornlie statistical area, whose boundary differs from Thornlie's, and our guide to reading a suburb report explains how our buyers agents weigh them.
$100M+
in property acquired for clients
1,200+
properties sourced and settled
500+
clients guided the whole way
98%
client retention rate
Speak with a Property Expert
Book a strategy session. We'll review your position and map your next purchase.
What best describes you?
This report is market intelligence prepared by Chase Wealth Australia for general information only. Figures are statistical estimates for the suburb, not valuations of any individual property, and do not constitute financial or credit advice. Consider your circumstances and seek professional advice before acting. Demographic figures are sourced from the Australian Bureau of Statistics, Census 2021 (licensed CC BY 4.0) where available.