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Mount Barker 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 Mount Barker Compares
Mount Barker vs the SA average and the national average (2021 Census, population-weighted).
| Metric | Mount Barker | SA avg | AU avg | Greater Adelaide |
|---|---|---|---|---|
| Household income/wk | $1,624 ≈SA | $1,545 | $1,836 | $1,620 |
| Rent/wk | $350 +SA | $308 | $390 | $329 |
| Mortgage/month | $1,603 ≈SA | $1,558 | $1,958 | $1,666 |
| Median age | 36 | 45.0 | 45.0 | 42.0 |
| SEIFA decile | 6/10 ≈SA | 5.0/10 | 6.0/10 | 7.0/10 |
| Unemployment | 3.7% -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.
Mount Barker is a locality 29 km from Adelaide in South Australia, classified as inner regional by the ABS. The postcode is 5251. It falls within the Adelaide - Central and Hills region. The local government area is Mount Barker.
According to the 2021 Census, Mount Barker has a population of 18,330 with a median age of 36. The median weekly household income is $1,624, close to the SA average. The unemployment rate is 3.7%, lower than the SA average. The Indigenous population is 292 (1.6% of residents).
Housing in Mount Barker includes a median weekly rent of $350, median monthly mortgage repayment of $1,603, with 7,032 total dwellings. These housing costs sit above the SA average. Owner-occupied dwellings (owned or mortgaged) make up 69.2% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Mount Barker scores in decile 6 out of 10, which is around the national average.
There are 7 schools in the Mount Barker area, including Mount Barker High School, St Francis de Sales College, Cornerstone College and others.
Mount Barker is part of the Adelaide Hills statistical area in South Australia.
Mount Barker Details
| Postcode | 5251 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 18,330 |
| Median Age | 36 years |
| Median Household Income (Census 2021) | $1,624/week |
| Median Personal Income (Census 2021) | $815/week |
| Median Weekly Rent (Census 2021) | $350 |
| Median Monthly Mortgage (Census 2021) | $1,603 |
| Average Household Size | 2.5 persons |
| Area | 37.9 km² |
| Population Density | 484/km² |
| Total Dwellings | 7,032 |
| Australian Citizens | 91.3% |
| Indigenous Population | 292 (1.6%) |
| Unemployment Rate | 3.7% |
| SEIFA IRSAD Decile | 6/10 (average) |
| Latitude | -35.0809029 |
| Longitude | 138.8634671 |
| Distance from Adelaide | 29 km |
| Region (SA4) | Adelaide - Central and Hills |
| Area (SA3) | Adelaide Hills |
| Local Government | Mount Barker |
| Federal Electorate | Mayo |
Age Profile
Show counts
| 0–14 years | 3,637 (19.8%) |
| 15–24 years | 2,291 (12.5%) |
| 25–44 years | 5,229 (28.5%) |
| 45–64 years | 4,013 (21.9%) |
| 65+ years | 3,157 (17.2%) |
Housing Tenure
SEIFA Socio-economic Index
Index of Relative Socio-economic Advantage and Disadvantage (IRSAD), decile 6 of 10. Higher deciles indicate more advantage.
Health Conditions (2021 Census)
| Asthma | 1,854 (10.1%) |
| Arthritis | 1,696 (9.3%) |
| Diabetes | 889 (4.8%) |
| Heart Disease | 747 (4.1%) |
| Cancer | 567 (3.1%) |
| Lung Condition | 306 (1.7%) |
| Dementia | 152 (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 | 372 (5.3%) |
| 1 vehicle | 2,470 (35.5%) |
| 2 vehicles | 2,795 (40.2%) |
| 3+ vehicles | 1,321 (19.0%) |
Schools in Mount Barker
Suburbs Near Mount Barker
Same Postcode (5251)
More Mount Barker 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.