South Australia · Postcode 5255
Bletchley postcode and suburb data
South Australia · Phone area code 08 · 50 km from Adelaide
Suburb snapshot
Bletchley 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 Bletchley ranks: household income is in the top 25% of SA suburbs.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Bletchley vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Bletchley | SA avg | AU avg | Greater Adelaide |
|---|---|---|---|---|
| Household income/wk | $1,875 +SA | $1,545 | $1,836 | $1,620 |
| Rent/wk | $100 -SA | $308 | $390 | $329 |
| Mortgage/month | $1,850 +SA | $1,558 | $1,958 | $1,666 |
| Median age | 41 | 45.0 | 45.0 | 42.0 |
| SEIFA decile | 7/10 +SA | 5.0/10 | 6.0/10 | 7.0/10 |
| Unemployment | 0.0% -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.
Bletchley is a locality 50 km from Adelaide in South Australia, classified as inner regional by the ABS. The postcode is 5255. It falls within the South Australia - South East region. The local government area is Alexandrina.
According to the 2021 Census, Bletchley has a population of 76 with a median age of 41. The median weekly household income is $1,875, above the SA average.
Housing in Bletchley includes a median weekly rent of $100, median monthly mortgage repayment of $1,850, with 24 total dwellings. These housing costs sit above the SA average. Owner-occupied dwellings (owned or mortgaged) make up 100.0% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Bletchley scores in decile 7 out of 10, which is above the national average.
Bletchley is part of the Murray and Mallee statistical area in South Australia.
Bletchley details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5255 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 76 |
| Median Age | 41 years |
| Median Household Income (Census 2021) | $1,875/week |
| Median Personal Income (Census 2021) | $674/week |
| Median Weekly Rent (Census 2021) | $100 |
| Median Monthly Mortgage (Census 2021) | $1,850 |
| Average Household Size | 3.2 persons |
| Area | 23.6 km² |
| Population Density | 3/km² |
| Total Dwellings | 24 |
| Australian Citizens | 102.6% |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 7/10 (above average) |
| Latitude | -35.2474861 |
| Longitude | 138.9894333 |
| Distance from Adelaide | 50 km |
| Region (SA4) | South Australia - South East |
| Area (SA3) | Murray and Mallee |
| Local Government | Alexandrina |
| Federal Electorate | Mayo |
| State Electorate | Hammond |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 25 (32.9%) |
| 15–24 years | 7 (9.2%) |
| 25–44 years | 16 (21.1%) |
| 45–64 years | 22 (28.9%) |
| 65+ years | 16 (21.1%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 8 (10.5%) |
| Asthma | 5 (6.6%) |
| Diabetes | 4 (5.3%) |
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 | 3 (12.0%) |
| 2 vehicles | 12 (48.0%) |
| 3+ vehicles | 10 (40.0%) |
Suburbs Near Bletchley
Same Postcode (5255)
More Bletchley 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.