Western Australia · Postcode 6720
Cossack postcode and suburb data
Western Australia · Phone area code 08 · 1260 km from Perth
Suburb snapshot
Cossack at a glance vs WA
Fast facts and benchmark bars show the suburb's key postcode, Census, SEIFA, school and LGA signals in context.
Quick facts
Benchmarks against WA
Income, rent and SEIFA figures are from the ABS 2021 Census and are reported in 2021 dollars, not adjusted for subsequent inflation.
Where Cossack ranks: household income is in the top 25% of WA suburbs; rents sit in the cheapest 10% in WA; SEIFA decile 1 places it in the bottom 20% of Australia for socio-economic advantage.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Cossack vs the WA average and the national average, using population-weighted 2021 Census data.
| Metric | Cossack | WA avg | AU avg |
|---|---|---|---|
| Household income/wk | $2,124 +WA | $1,891 | $1,836 |
| Mortgage/month | $2,104 +WA | $1,890 | $1,958 |
| Median age | 24 | 43.0 | 45.0 |
| SEIFA decile | 1/10 -WA | 6.0/10 | 6.0/10 |
| Unemployment | 0.0% -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.
Cossack is a very remote community in Western Australia, with postcode 6720. It lies roughly 1260 km from Perth, classified by the ABS as very remote Australia. The area is administered by Karratha.
According to the 2021 Census, Cossack has a population of 14 with a median age of 24. The median weekly household income is $2,124, above the WA average.
Housing in Cossack includes a median monthly mortgage repayment of $2,104. These housing costs sit above the WA average.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Cossack scores in decile 1 out of 10, which is well below the national average.
Cossack is part of the West Pilbara statistical area in Western Australia.
Cossack details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 6720 |
| State | Western Australia (WA) |
| Phone Area Code | 08 |
| Population (2021) | 14 |
| Median Age | 24 years |
| Median Household Income (Census 2021) | $2,124/week |
| Median Personal Income (Census 2021) | $824/week |
| Median Monthly Mortgage (Census 2021) | $2,104 |
| Average Household Size | 2 persons |
| Area | 21.1 km² |
| Population Density | 1/km² |
| Australian Citizens | 28.6% |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 1/10 (well below average) |
| Latitude | -20.6810063 |
| Longitude | 117.1855226 |
| Distance from Perth | 1260 km |
| Region (SA4) | Western Australia - Outback (North) |
| Area (SA3) | West Pilbara |
| Local Government | Karratha |
| Federal Electorate | Durack |
| State Electorate | Pilbara (Mining and Pastoral) |
| Time Zone | AWST (UTC+8), Australia/Perth (standard time) |
Age Profile
Show counts
| 0–14 years | 0 (0.0%) |
| 15–24 years | 9 (64.3%) |
| 25–44 years | 7 (50.0%) |
| 45–64 years | 0 (0.0%) |
| 65+ years | 0 (0.0%) |
SEIFA socio-economic index
Suburbs Near Cossack
Same Postcode (6720)
More Cossack 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.