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Cardinia Postcode
Victoria
Income, rent and SEIFA figures are from the ABS 2021 Census and are reported in 2021 dollars, not adjusted for subsequent inflation.
How Cardinia Compares
Cardinia vs the VIC average and the national average (2021 Census, population-weighted).
| Metric | Cardinia | VIC avg | AU avg |
|---|---|---|---|
| Household income/wk | $1,875 ≈VIC | $1,817 | $1,836 |
| Rent/wk | $390 ≈VIC | $375 | $390 |
| Mortgage/month | $1,950 ≈VIC | $1,933 | $1,958 |
| Median age | 44 | 46.0 | 45.0 |
| SEIFA decile | 6/10 ≈VIC | 6.0/10 | 6.0/10 |
| Unemployment | 5.0% ≈VIC | 5.0% | 5.0% |
Green pill = at least 10% above the VIC average; red = at least 10% below; grey = within 10%. For unemployment, colour polarity is inverted: lower is better.
Postcode 3978 covers Cardinia, an inland suburb of Melbourne about 55 km from the city centre. It forms part of the Melbourne - South East region of Victoria. Local government services are provided by Cardinia.
According to the 2021 Census, Cardinia has a population of 342 with a median age of 44. The median weekly household income is $1,875, close to the VIC average. The unemployment rate is 5.0%. The Indigenous population is 11 (3.2% of residents).
Housing in Cardinia includes a median weekly rent of $390, median monthly mortgage repayment of $1,950, with 113 total dwellings. Owner-occupied dwellings (owned or mortgaged) make up 89.6% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Cardinia scores in decile 6 out of 10, which is around the national average.
Cardinia is served by Cardinia Primary School.
Cardinia is part of the Casey - South statistical area in Victoria.
Cardinia Details
| Postcode | 3978 |
| State | Victoria (VIC) |
| Phone Area Code | 03 |
| Population (2021) | 342 |
| Median Age | 44 years |
| Median Household Income (Census 2021) | $1,875/week |
| Median Personal Income (Census 2021) | $693/week |
| Median Weekly Rent (Census 2021) | $390 |
| Median Monthly Mortgage (Census 2021) | $1,950 |
| Average Household Size | 2.9 persons |
| Area | 27.0 km² |
| Population Density | 13/km² |
| Total Dwellings | 113 |
| Australian Citizens | 89.8% |
| Indigenous Population | 11 (3.2%) |
| Unemployment Rate | 5.0% |
| SEIFA IRSAD Decile | 6/10 (average) |
| Latitude | -38.147 |
| Longitude | 145.423 |
| Distance from Melbourne | 55 km |
| Region (SA4) | Melbourne - South East |
| Area (SA3) | Casey - South |
| Local Government | Cardinia |
| Federal Electorate | Holt |
Age Profile
Show counts
| 0–14 years | 47 (13.7%) |
| 15–24 years | 49 (14.3%) |
| 25–44 years | 77 (22.5%) |
| 45–64 years | 100 (29.2%) |
| 65+ years | 67 (19.6%) |
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)
| Arthritis | 31 (9.1%) |
| Asthma | 26 (7.6%) |
| Heart Disease | 12 (3.5%) |
| Cancer | 10 (2.9%) |
| Diabetes | 9 (2.6%) |
| Lung Condition | 3 (0.9%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 3 (2.8%) |
| 1 vehicle | 12 (11.2%) |
| 2 vehicles | 34 (31.8%) |
| 3+ vehicles | 58 (54.2%) |
Schools in Cardinia
Suburbs Near Cardinia
Same Postcode (3978)
More Cardinia 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.