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Thornlie Postcode
Western Australia
Income, rent and SEIFA figures are from the ABS 2021 Census and are reported in 2021 dollars, not adjusted for subsequent inflation.
How Thornlie Compares
Thornlie vs the WA average and the national average (2021 Census, population-weighted).
| Metric | Thornlie | WA avg | AU avg | Greater Perth |
|---|---|---|---|---|
| Household income/wk | $1,571 -WA | $1,891 | $1,836 | $1,962 |
| Rent/wk | $330 ≈WA | $355 | $390 | $378 |
| Mortgage/month | $1,625 -WA | $1,890 | $1,958 | $2,002 |
| Median age | 38 | 43.0 | 45.0 | 40.0 |
| SEIFA decile | 4/10 -WA | 6.0/10 | 6.0/10 | 8.0/10 |
| Unemployment | 7.1% +WA | 5.0% | 5.0% | 5.0% |
Green pill = at least 10% above the WA average; red = at least 10% below; grey = within 10%. For unemployment, colour polarity is inverted: lower is better.
Postcode 6108 covers Thornlie, an inland suburb of Perth about 15 km from the city centre. It forms part of the Perth - South East region of Western Australia. Local government services are provided by Gosnells.
According to the 2021 Census, Thornlie has a population of 23,665 with a median age of 38. The median weekly household income is $1,571, below the WA average. The unemployment rate is 7.1%, higher than the WA average. The Indigenous population is 562 (2.4% of residents).
Housing in Thornlie includes a median weekly rent of $330, median monthly mortgage repayment of $1,625, with 8,401 total dwellings. Housing costs in the area sit below the WA average. Owner-occupied dwellings (owned or mortgaged) make up 78.2% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Thornlie scores in decile 4 out of 10, which is below the national average.
There are 7 schools in the Thornlie area, including Thornlie Senior High School, Australian Islamic College (Thornlie), Forest Crescent Primary School and others.
Thornlie is part of the Gosnells statistical area in Western Australia.
Thornlie Details
| Postcode | 6108 |
| State | Western Australia (WA) |
| Phone Area Code | 08 |
| Population (2021) | 23,665 |
| Median Age | 38 years |
| Median Household Income (Census 2021) | $1,571/week |
| Median Personal Income (Census 2021) | $682/week |
| Median Weekly Rent (Census 2021) | $330 |
| Median Monthly Mortgage (Census 2021) | $1,625 |
| Average Household Size | 2.7 persons |
| Area | 11.6 km² |
| Population Density | 2042/km² |
| Total Dwellings | 8,401 |
| Australian Citizens | 80.3% |
| Indigenous Population | 562 (2.4%) |
| Unemployment Rate | 7.1% |
| SEIFA IRSAD Decile | 4/10 (below average) |
| Latitude | -32.0570426 |
| Longitude | 115.9527126 |
| Distance from Perth | 15 km |
| Region (SA4) | Perth - South East |
| Area (SA3) | Gosnells |
| Local Government | Gosnells |
| Federal Electorate | Burt |
Age Profile
Show counts
| 0–14 years | 4,605 (19.5%) |
| 15–24 years | 2,888 (12.2%) |
| 25–44 years | 6,339 (26.8%) |
| 45–64 years | 5,828 (24.6%) |
| 65+ years | 4,005 (16.9%) |
Housing Tenure
SEIFA Socio-economic Index
Index of Relative Socio-economic Advantage and Disadvantage (IRSAD), decile 4 of 10. Higher deciles indicate more advantage.
Health Conditions (2021 Census)
| Arthritis | 1,893 (8.0%) |
| Asthma | 1,814 (7.7%) |
| Diabetes | 1,477 (6.2%) |
| Heart Disease | 935 (4.0%) |
| Cancer | 643 (2.7%) |
| Lung Condition | 419 (1.8%) |
| Dementia | 99 (0.4%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 328 (4.0%) |
| 1 vehicle | 2,718 (32.7%) |
| 2 vehicles | 3,336 (40.2%) |
| 3+ vehicles | 1,920 (23.1%) |
Schools in Thornlie
Suburbs Near Thornlie
More Thornlie Data
Page last reviewed . Data sources: Australian Bureau of Statistics 2021 Census (CC BY 4.0), SEIFA 2021 IRSAD, ACARA school profiles 2025. How this data is sourced.