Western Australia · Postcode 6121
Oldbury postcode and suburb data
Western Australia · Phone area code 08 · 34 km from Perth
Suburb snapshot
Oldbury at a glance vs WA
Fast facts and benchmark bars show the suburb's key postcode, Census, SEIFA, school and LGA signals in context.
Quick facts
Benchmarks against WA
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
Oldbury vs the WA average and the national average, using population-weighted 2021 Census data.
| Metric | Oldbury | WA avg | AU avg | Greater Perth |
|---|---|---|---|---|
| Household income/wk | $1,928 ≈WA | $1,891 | $1,836 | $1,962 |
| Rent/wk | $300 -WA | $355 | $390 | $378 |
| Mortgage/month | $2,400 +WA | $1,890 | $1,958 | $2,002 |
| Median age | 50 | 43.0 | 45.0 | 40.0 |
| SEIFA decile | 6/10 ≈WA | 6.0/10 | 6.0/10 | 8.0/10 |
| Unemployment | 4.7% ≈WA | 5.0% | 5.0% | 5.0% |
Green pill = at least 10% above the WA average; red = at least 10% below; grey = within 10%. For unemployment, colour polarity is inverted: lower is better.
Postcode 6121 covers Oldbury, an inland suburb of Perth about 34 km from the city centre. It forms part of the Perth - South East region of Western Australia. Local government services are provided by Serpentine-Jarrahdale.
According to the 2021 Census, Oldbury has a population of 296 with a median age of 50. The median weekly household income is $1,928, close to the WA average. The unemployment rate is 4.7%. The Indigenous population is 3 (1.0% of residents).
Housing in Oldbury includes a median weekly rent of $300, median monthly mortgage repayment of $2,400, with 105 total dwellings. These housing costs sit above the WA average. Owner-occupied dwellings (owned or mortgaged) make up 77.4% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Oldbury scores in decile 6 out of 10, which is around the national average.
Oldbury is part of the Serpentine - Jarrahdale statistical area in Western Australia.
Oldbury details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 6121 |
| State | Western Australia (WA) |
| Phone Area Code | 08 |
| Population (2021) | 296 |
| Median Age | 50 years |
| Median Household Income (Census 2021) | $1,928/week |
| Median Personal Income (Census 2021) | $876/week |
| Median Weekly Rent (Census 2021) | $300 |
| Median Monthly Mortgage (Census 2021) | $2,400 |
| Average Household Size | 2.6 persons |
| Area | 41.1 km² |
| Population Density | 7/km² |
| Total Dwellings | 105 |
| Australian Citizens | 87.2% |
| Indigenous Population | 3 (1.0%) |
| Unemployment Rate | 4.7% |
| SEIFA IRSAD Decile | 6/10 (average) |
| Latitude | -32.2544608 |
| Longitude | 115.9070305 |
| Distance from Perth | 34 km |
| Region (SA4) | Perth - South East |
| Area (SA3) | Serpentine - Jarrahdale |
| Local Government | Serpentine-Jarrahdale |
| Federal Electorate | Canning |
| State Electorate | Darling Range (East Metropolitan) |
| Time Zone | AWST (UTC+8), Australia/Perth (standard time) |
Age Profile
Show counts
| 0–14 years | 34 (11.5%) |
| 15–24 years | 33 (11.1%) |
| 25–44 years | 54 (18.2%) |
| 45–64 years | 99 (33.4%) |
| 65+ years | 76 (25.7%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 27 (9.1%) |
| Asthma | 26 (8.8%) |
| Heart Disease | 19 (6.4%) |
| Diabetes | 15 (5.1%) |
| Cancer | 11 (3.7%) |
| Lung Condition | 5 (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 | 0 (0.0%) |
| 1 vehicle | 10 (9.7%) |
| 2 vehicles | 40 (38.8%) |
| 3+ vehicles | 53 (51.5%) |
Suburbs Near Oldbury
Same Postcode (6121)
More Oldbury 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.