South Australia · Postcode 5373
St Johns postcode and suburb data
South Australia · Phone area code 08 · 69 km from Adelaide
Suburb snapshot
St Johns 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 St Johns ranks: household income is in the top 25% of SA suburbs.
ABS Census 2021 · SEIFA 2021Detailed comparison table
St Johns vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | St Johns | SA avg | AU avg |
|---|---|---|---|
| Household income/wk | $2,124 +SA | $1,545 | $1,836 |
| Rent/wk | $180 -SA | $308 | $390 |
| Mortgage/month | $1,614 ≈SA | $1,558 | $1,958 |
| Median age | 41 | 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.
St Johns is a locality 69 km from Adelaide in South Australia, classified as inner regional by the ABS. The postcode is 5373. It falls within the Barossa - Yorke - Mid North region. The local government area is Light.
According to the 2021 Census, St Johns has a population of 8 with a median age of 41. The median weekly household income is $2,124, above the SA average.
Housing in St Johns includes a median weekly rent of $180, median monthly mortgage repayment of $1,614, with 5 total dwellings. Housing costs in the area sit below the SA average.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, St Johns scores in decile 5 out of 10, which is around the national average.
St Johns is part of the Barossa statistical area in South Australia.
St Johns details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5373 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 8 |
| Median Age | 41 years |
| Median Household Income (Census 2021) | $2,124/week |
| Median Personal Income (Census 2021) | $1,374/week |
| Median Weekly Rent (Census 2021) | $180 |
| Median Monthly Mortgage (Census 2021) | $1,614 |
| Average Household Size | 2.3 persons |
| Area | 17.6 km² |
| Population Density | 0/km² |
| Total Dwellings | 5 |
| Australian Citizens | 100.0% |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 5/10 (average) |
| Latitude | -34.3742117 |
| Longitude | 138.9502577 |
| Distance from Adelaide | 69 km |
| Region (SA4) | Barossa - Yorke - Mid North |
| Area (SA3) | Barossa |
| Local Government | Light |
| Federal Electorate | Barker |
| State Electorate | Schubert |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 3 (37.5%) |
| 15–24 years | 0 (0.0%) |
| 25–44 years | 0 (0.0%) |
| 45–64 years | 3 (37.5%) |
| 65+ years | 0 (0.0%) |
SEIFA socio-economic index
Suburbs Near St Johns
Same Postcode (5373)
More St Johns 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.