Seaton Postcode
South Australia
Income, rent and SEIFA figures are from the ABS 2021 Census and are reported in 2021 dollars, not adjusted for subsequent inflation.
How Seaton Compares
Seaton vs the SA average and the national average (2021 Census, population-weighted).
| Metric | Seaton | SA avg | AU avg | Greater Adelaide |
|---|---|---|---|---|
| Household income/wk | $1,300 -SA | $1,545 | $1,836 | $1,620 |
| Rent/wk | $310 ≈SA | $308 | $390 | $329 |
| Mortgage/month | $1,700 ≈SA | $1,558 | $1,958 | $1,666 |
| Median age | 40 | 45.0 | 45.0 | 42.0 |
| SEIFA decile | 3/10 -SA | 5.0/10 | 6.0/10 | 7.0/10 |
| Unemployment | 5.0% -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.
Seaton is a coastal suburb of Adelaide in South Australia, with postcode 5023. It sits about 9 km from the Adelaide CBD, within the Charles Sturt local government area. The suburb footprint covers roughly 4.6 square kilometres.
According to the 2021 Census, Seaton has a population of 10,877 with a median age of 40. The median weekly household income is $1,300, below the SA average. The unemployment rate is 5.0%, lower than the SA average. The Indigenous population is 236 (2.2% of residents).
Housing in Seaton includes a median weekly rent of $310, median monthly mortgage repayment of $1,700, with 4,535 total dwellings. Owner-occupied dwellings (owned or mortgaged) make up 62.9% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Seaton scores in decile 3 out of 10, which is below the national average.
Schools in Seaton include Seaton High School and Seaton Park Primary School.
Seaton is part of the Charles Sturt statistical area in South Australia.
Seaton Details
| Postcode | 5023 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 10,877 |
| Median Age | 40 years |
| Median Household Income (Census 2021) | $1,300/week |
| Median Personal Income (Census 2021) | $696/week |
| Median Weekly Rent (Census 2021) | $310 |
| Median Monthly Mortgage (Census 2021) | $1,700 |
| Average Household Size | 2.3 persons |
| Area | 4.6 km² |
| Population Density | 2371/km² |
| Total Dwellings | 4,535 |
| Australian Citizens | 86.7% |
| Indigenous Population | 236 (2.2%) |
| Unemployment Rate | 5.0% |
| SEIFA IRSAD Decile | 3/10 (below average) |
| Latitude | -34.899 |
| Longitude | 138.514 |
| Distance from Adelaide | 9 km |
| Region (SA4) | Adelaide - West |
| Area (SA3) | Charles Sturt |
| Local Government | Charles Sturt |
| Federal Electorate | Hindmarsh |
Age Profile
Show counts
| 0–14 years | 1,650 (15.2%) |
| 15–24 years | 1,168 (10.7%) |
| 25–44 years | 3,141 (28.9%) |
| 45–64 years | 2,662 (24.5%) |
| 65+ years | 2,259 (20.8%) |
Housing Tenure
SEIFA Socio-economic Index
Index of Relative Socio-economic Advantage and Disadvantage (IRSAD), decile 3 of 10. Higher deciles indicate more advantage.
Health Conditions (2021 Census)
| Arthritis | 1,146 (10.5%) |
| Asthma | 813 (7.5%) |
| Diabetes | 729 (6.7%) |
| Heart Disease | 548 (5.0%) |
| Cancer | 345 (3.2%) |
| Lung Condition | 218 (2.0%) |
| Dementia | 185 (1.7%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 430 (9.6%) |
| 1 vehicle | 1,859 (41.7%) |
| 2 vehicles | 1,482 (33.2%) |
| 3+ vehicles | 687 (15.4%) |
Schools in Seaton
Suburbs Near Seaton
Same Postcode (5023)
More Seaton 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.