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South Australia · Postcode 5291
Cape Douglas postcode and suburb data
South Australia · Phone area code 08 · 386 km from Adelaide
Suburb snapshot
Cape Douglas 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.
Detailed comparison table
Cape Douglas vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Cape Douglas | SA avg | AU avg |
|---|---|---|---|
| Household income/wk | $1,166 -SA | $1,545 | $1,836 |
| Rent/wk | $110 -SA | $308 | $390 |
| Mortgage/month | $1,127 -SA | $1,558 | $1,958 |
| Median age | 50 | 45.0 | 45.0 |
| SEIFA decile | 3/10 -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.
Cape Douglas is a locality 386 km from Adelaide in South Australia, classified as outer regional by the ABS. The postcode is 5291. It falls within the South Australia - South East region. The local government area is Grant.
According to the 2021 Census, Cape Douglas has a population of 68 with a median age of 50. The median weekly household income is $1,166, below the SA average.
Housing in Cape Douglas includes a median weekly rent of $110, median monthly mortgage repayment of $1,127, with 19 total dwellings. Housing costs in the area sit below the SA average. Owner-occupied dwellings (owned or mortgaged) make up 80.0% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Cape Douglas scores in decile 3 out of 10, which is below the national average.
Cape Douglas is part of the Limestone Coast statistical area in South Australia.
Cape Douglas details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5291 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 68 |
| Median Age | 50 years |
| Median Household Income (Census 2021) | $1,166/week |
| Median Personal Income (Census 2021) | $630/week |
| Median Weekly Rent (Census 2021) | $110 |
| Median Monthly Mortgage (Census 2021) | $1,127 |
| Average Household Size | 2.4 persons |
| Area | 27.8 km² |
| Population Density | 2/km² |
| Total Dwellings | 19 |
| Australian Citizens | 79.4% |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 3/10 (below average) |
| Latitude | -38.0146455 |
| Longitude | 140.5819172 |
| Distance from Adelaide | 386 km |
| Region (SA4) | South Australia - South East |
| Area (SA3) | Limestone Coast |
| Local Government | Grant |
| Federal Electorate | Barker |
| State Electorate | Mount Gambier |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 12 (17.6%) |
| 15–24 years | 6 (8.8%) |
| 25–44 years | 7 (10.3%) |
| 45–64 years | 22 (32.4%) |
| 65+ years | 19 (27.9%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Asthma | 7 (10.3%) |
| Arthritis | 6 (8.8%) |
| Diabetes | 6 (8.8%) |
| Heart Disease | 6 (8.8%) |
| Lung Condition | 6 (8.8%) |
| Cancer | 4 (5.9%) |
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 | 3 (13.6%) |
| 2 vehicles | 11 (50.0%) |
| 3+ vehicles | 8 (36.4%) |
Suburbs Near Cape Douglas
Same Postcode (5291)
More Cape Douglas 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.