South Australia · Postcode 5280
Thornlea postcode and suburb data
South Australia · Phone area code 08 · 309 km from Adelaide
Suburb snapshot
Thornlea at a glance vs SA
Fast facts and benchmark bars show the suburb's key postcode, Census, SEIFA, school and LGA signals in context.
Quick facts
Benchmarks against SA
Income, rent and SEIFA figures are from the ABS 2021 Census and are reported in 2021 dollars, not adjusted for subsequent inflation.
Where Thornlea ranks: household income is in the top 25% of SA suburbs.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Thornlea vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Thornlea | SA avg | AU avg |
|---|---|---|---|
| Household income/wk | $1,968 +SA | $1,545 | $1,836 |
| Rent/wk | $180 -SA | $308 | $390 |
| Mortgage/month | $975 -SA | $1,558 | $1,958 |
| Median age | 37 | 45.0 | 45.0 |
| SEIFA decile | 5/10 ≈SA | 5.0/10 | 6.0/10 |
| Unemployment | 0.0% -SA | 6.0% | 5.0% |
Green pill = at least 10% above the SA average; red = at least 10% below; grey = within 10%. For unemployment, colour polarity is inverted: lower is better.
Thornlea is a locality 309 km from Adelaide in South Australia, classified as outer regional by the ABS. The postcode is 5280. It falls within the South Australia - South East region. The local government area is Wattle Range.
According to the 2021 Census, Thornlea has a population of 46 with a median age of 37. The median weekly household income is $1,968, above the SA average.
Housing in Thornlea includes a median weekly rent of $180, median monthly mortgage repayment of $975, with 17 total dwellings. Housing costs in the area sit below the SA average. Owner-occupied dwellings (owned or mortgaged) make up 100.0% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Thornlea scores in decile 5 out of 10, which is around the national average.
Thornlea is part of the Limestone Coast statistical area in South Australia.
Thornlea details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5280 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 46 |
| Median Age | 37 years |
| Median Household Income (Census 2021) | $1,968/week |
| Median Personal Income (Census 2021) | $1,050/week |
| Median Weekly Rent (Census 2021) | $180 |
| Median Monthly Mortgage (Census 2021) | $975 |
| Average Household Size | 2.7 persons |
| Area | 117.6 km² |
| Population Density | 0/km² |
| Total Dwellings | 17 |
| Australian Citizens | 102.2% |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 5/10 (average) |
| Latitude | -37.4038782 |
| Longitude | 140.1709898 |
| Distance from Adelaide | 309 km |
| Region (SA4) | South Australia - South East |
| Area (SA3) | Limestone Coast |
| Local Government | Wattle Range |
| Federal Electorate | Barker |
| State Electorate | Mount Gambier |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 14 (30.4%) |
| 15–24 years | 4 (8.7%) |
| 25–44 years | 14 (30.4%) |
| 45–64 years | 13 (28.3%) |
| 65+ years | 3 (6.5%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Asthma | 6 (13.0%) |
| Diabetes | 5 (10.9%) |
| Arthritis | 4 (8.7%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 0 (0.0%) |
| 1 vehicle | 0 (0.0%) |
| 2 vehicles | 8 (66.7%) |
| 3+ vehicles | 4 (33.3%) |
Suburbs Near Thornlea
Same Postcode (5280)
More Thornlea 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.