South Australia · Postcode 5222
Willoughby postcode and suburb data
South Australia · Phone area code 08 · 108 km from Adelaide
Suburb snapshot
Willoughby 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 Willoughby ranks: household income is in the top 25% of SA suburbs.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Willoughby vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Willoughby | SA avg | AU avg |
|---|---|---|---|
| Household income/wk | $1,874 +SA | $1,545 | $1,836 |
| Median age | 54 | 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.
Willoughby is a remote community in South Australia, with postcode 5222. It lies roughly 108 km from Adelaide, classified by the ABS as remote Australia. The area is administered by Kangaroo Island.
According to the 2021 Census, Willoughby has a population of 11 with a median age of 54. The median weekly household income is $1,874, above the SA average.
Housing in Willoughby includes a 5 total dwellings. Housing costs in the area sit below the SA average.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Willoughby scores in decile 5 out of 10, which is around the national average.
Willoughby is part of the Fleurieu - Kangaroo Island statistical area in South Australia.
Willoughby details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5222 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 11 |
| Median Age | 54 years |
| Median Household Income (Census 2021) | $1,874/week |
| Median Personal Income (Census 2021) | $866/week |
| Average Household Size | 2 persons |
| Area | 25.9 km² |
| Population Density | 0/km² |
| Total Dwellings | 5 |
| Australian Citizens | 54.5% |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 5/10 (average) |
| Latitude | -35.8075884 |
| Longitude | 138.09777 |
| Distance from Adelaide | 108 km |
| Region (SA4) | South Australia - South East |
| Area (SA3) | Fleurieu - Kangaroo Island |
| Local Government | Kangaroo Island |
| Federal Electorate | Mayo |
| State Electorate | Mawson |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 0 (0.0%) |
| 15–24 years | 0 (0.0%) |
| 25–44 years | 0 (0.0%) |
| 45–64 years | 0 (0.0%) |
| 65+ years | 3 (27.3%) |
SEIFA socio-economic index
Suburbs Near Willoughby
Same Postcode (5222)
More Willoughby 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.