South Australia · Postcode 5250
Blakiston postcode and suburb data
South Australia · Phone area code 08 · 29 km from Adelaide
Suburb snapshot
Blakiston 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 Blakiston ranks: household income is in the top 10% of SA suburbs; rents are among the top 10% in SA; SEIFA decile 9 puts it in the top 20% of Australia for socio-economic advantage.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Blakiston vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Blakiston | SA avg | AU avg | Greater Adelaide |
|---|---|---|---|---|
| Household income/wk | $2,600 +SA | $1,545 | $1,836 | $1,620 |
| Rent/wk | $550 +SA | $308 | $390 | $329 |
| Mortgage/month | $2,134 +SA | $1,558 | $1,958 | $1,666 |
| Median age | 46 | 45.0 | 45.0 | 42.0 |
| SEIFA decile | 9/10 +SA | 5.0/10 | 6.0/10 | 7.0/10 |
| Unemployment | 2.0% -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.
Postcode 5250 covers Blakiston, an inland suburb of Adelaide about 29 km from the city centre. It forms part of the Adelaide - Central and Hills region of South Australia. Local government services are provided by Mount Barker.
According to the 2021 Census, Blakiston has a population of 377 with a median age of 46. The median weekly household income is $2,600, above the SA average. The unemployment rate is 2.0%, lower than the SA average.
Housing in Blakiston includes a median weekly rent of $550, median monthly mortgage repayment of $2,134, with 120 total dwellings. These housing costs sit above the SA average. Owner-occupied dwellings (owned or mortgaged) make up 96.7% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Blakiston scores in decile 9 out of 10, which is well above the national average.
Blakiston is part of the Adelaide Hills statistical area in South Australia.
Blakiston details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5250 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 377 |
| Median Age | 46 years |
| Median Household Income (Census 2021) | $2,600/week |
| Median Personal Income (Census 2021) | $810/week |
| Median Weekly Rent (Census 2021) | $550 |
| Median Monthly Mortgage (Census 2021) | $2,134 |
| Average Household Size | 3 persons |
| Area | 2.1 km² |
| Population Density | 180/km² |
| Total Dwellings | 120 |
| Australian Citizens | 96.0% |
| Unemployment Rate | 2.0% |
| SEIFA IRSAD Decile | 9/10 (well above average) |
| Latitude | -35.05 |
| Longitude | 138.883333 |
| Distance from Adelaide | 29 km |
| Region (SA4) | Adelaide - Central and Hills |
| Area (SA3) | Adelaide Hills |
| Local Government | Mount Barker |
| Federal Electorate | Mayo |
| State Electorate | Kavel |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 63 (16.7%) |
| 15–24 years | 59 (15.6%) |
| 25–44 years | 52 (13.8%) |
| 45–64 years | 136 (36.1%) |
| 65+ years | 65 (17.2%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Asthma | 40 (10.6%) |
| Arthritis | 37 (9.8%) |
| Heart Disease | 20 (5.3%) |
| Diabetes | 16 (4.2%) |
| Cancer | 16 (4.2%) |
| Lung Condition | 3 (0.8%) |
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 | 16 (12.8%) |
| 2 vehicles | 47 (37.6%) |
| 3+ vehicles | 62 (49.6%) |
Suburbs Near Blakiston
Same Postcode (5250)
More Blakiston 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.