South Australia · Postcode 5097
St Agnes postcode and suburb data
South Australia · Phone area code 08 · 15 km from Adelaide
Suburb snapshot
St Agnes 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
St Agnes vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | St Agnes | SA avg | AU avg | Greater Adelaide |
|---|---|---|---|---|
| Household income/wk | $1,557 ≈SA | $1,545 | $1,836 | $1,620 |
| Rent/wk | $340 +SA | $308 | $390 | $329 |
| Mortgage/month | $1,500 ≈SA | $1,558 | $1,958 | $1,666 |
| Median age | 44 | 45.0 | 45.0 | 42.0 |
| SEIFA decile | 5/10 ≈SA | 5.0/10 | 6.0/10 | 7.0/10 |
| Unemployment | 3.8% -SA | 6.0% | 5.0% | 6.0% |
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.
Postcode 5097 covers St Agnes, an inland suburb of Adelaide about 15 km from the city centre. It forms part of the Adelaide - North region of South Australia. Local government services are provided by Tea Tree Gully.
According to the 2021 Census, St Agnes has a population of 4,233 with a median age of 44. The median weekly household income is $1,557, close to the SA average. The unemployment rate is 3.8%, lower than the SA average. The Indigenous population is 57 (1.3% of residents).
Housing in St Agnes includes a median weekly rent of $340, median monthly mortgage repayment of $1,500, with 1,650 total dwellings. These housing costs sit above the SA average. Owner-occupied dwellings (owned or mortgaged) make up 82.8% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, St Agnes scores in decile 5 out of 10, which is around the national average.
Schools in St Agnes include Ardtornish Primary School and St Agnes School P - 6.
St Agnes is part of the Tea Tree Gully statistical area in South Australia.
St Agnes details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5097 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 4,233 |
| Median Age | 44 years |
| Median Household Income (Census 2021) | $1,557/week |
| Median Personal Income (Census 2021) | $746/week |
| Median Weekly Rent (Census 2021) | $340 |
| Median Monthly Mortgage (Census 2021) | $1,500 |
| Average Household Size | 2.4 persons |
| Area | 2.6 km² |
| Population Density | 1628/km² |
| Total Dwellings | 1,650 |
| Australian Citizens | 90.3% |
| Indigenous Population | 57 (1.3%) |
| Unemployment Rate | 3.8% |
| SEIFA IRSAD Decile | 5/10 (average) |
| Latitude | -34.830278 |
| Longitude | 138.711111 |
| Distance from Adelaide | 15 km |
| Region (SA4) | Adelaide - North |
| Area (SA3) | Tea Tree Gully |
| Local Government | Tea Tree Gully |
| Federal Electorate | Makin |
| State Electorate | Wright |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 710 (16.8%) |
| 15–24 years | 409 (9.7%) |
| 25–44 years | 1,011 (23.9%) |
| 45–64 years | 1,122 (26.5%) |
| 65+ years | 984 (23.2%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 513 (12.1%) |
| Asthma | 385 (9.1%) |
| Diabetes | 283 (6.7%) |
| Heart Disease | 273 (6.4%) |
| Cancer | 198 (4.7%) |
| Dementia | 95 (2.2%) |
| Lung Condition | 75 (1.8%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 69 (4.2%) |
| 1 vehicle | 592 (36.1%) |
| 2 vehicles | 667 (40.6%) |
| 3+ vehicles | 313 (19.1%) |
Schools in St Agnes
ACARA 2025 school profiles for schools located in St Agnes. ICSEA is shown where ACARA publishes it.
Suburbs Near St Agnes
Same Postcode (5097)
More St Agnes 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.