Castletown 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 Castletown Compares
Castletown vs the WA average and the national average (2021 Census, population-weighted).
| Metric | Castletown | WA avg | AU avg |
|---|---|---|---|
| Household income/wk | $1,612 -WA | $1,891 | $1,836 |
| Rent/wk | $300 -WA | $355 | $390 |
| Mortgage/month | $1,717 ≈WA | $1,890 | $1,958 |
| Median age | 38 | 43.0 | 45.0 |
| SEIFA decile | 4/10 -WA | 6.0/10 | 6.0/10 |
| Unemployment | 2.2% -WA | 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.
Castletown is a very remote community in Western Australia, with postcode 6450. It lies roughly 602 km from Perth, classified by the ABS as very remote Australia. The area is administered by Esperance.
According to the 2021 Census, Castletown has a population of 3,968 with a median age of 38. The median weekly household income is $1,612, below the WA average. The unemployment rate is 2.2%, lower than the WA average. The Indigenous population is 172 (4.3% of residents).
Housing in Castletown includes a median weekly rent of $300, median monthly mortgage repayment of $1,717, with 1,420 total dwellings. Housing costs in the area sit below the WA average. Owner-occupied dwellings (owned or mortgaged) make up 68.5% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Castletown scores in decile 4 out of 10, which is below the national average.
Castletown is part of the Esperance statistical area in Western Australia.
Castletown Details
| Postcode | 6450 |
| State | Western Australia (WA) |
| Phone Area Code | 08 |
| Population (2021) | 3,968 |
| Median Age | 38 years |
| Median Household Income (Census 2021) | $1,612/week |
| Median Personal Income (Census 2021) | $833/week |
| Median Weekly Rent (Census 2021) | $300 |
| Median Monthly Mortgage (Census 2021) | $1,717 |
| Average Household Size | 2.4 persons |
| Area | 3.5 km² |
| Population Density | 1134/km² |
| Total Dwellings | 1,420 |
| Australian Citizens | 85.5% |
| Indigenous Population | 172 (4.3%) |
| Unemployment Rate | 2.2% |
| SEIFA IRSAD Decile | 4/10 (below average) |
| Latitude | -33.8392511 |
| Longitude | 121.9044735 |
| Distance from Perth | 602 km |
| Region (SA4) | Western Australia - Outback (South) |
| Area (SA3) | Esperance |
| Local Government | Esperance |
| Federal Electorate | O'Connor |
Age Profile
Show counts
| 0–14 years | 831 (20.9%) |
| 15–24 years | 478 (12.0%) |
| 25–44 years | 1,017 (25.6%) |
| 45–64 years | 927 (23.4%) |
| 65+ years | 719 (18.1%) |
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)
| Asthma | 362 (9.1%) |
| Arthritis | 317 (8.0%) |
| Diabetes | 185 (4.7%) |
| Heart Disease | 154 (3.9%) |
| Cancer | 108 (2.7%) |
| Lung Condition | 68 (1.7%) |
| Dementia | 15 (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 | 36 (2.6%) |
| 1 vehicle | 452 (32.0%) |
| 2 vehicles | 610 (43.2%) |
| 3+ vehicles | 313 (22.2%) |
Suburbs Near Castletown
Same Postcode (6450)
More Castletown 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.