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Victoria · Postcode 3089
Diamond Creek postcode and suburb data
Victoria · Phone area code 03 · 23 km from Melbourne
Suburb snapshot
Diamond Creek at a glance vs VIC
Fast facts and benchmark bars show the suburb's key postcode, Census, SEIFA, school and LGA signals in context.
Quick facts
Benchmarks against VIC
Income, rent and SEIFA figures are from the ABS 2021 Census and are reported in 2021 dollars, not adjusted for subsequent inflation.
Where Diamond Creek ranks: household income is in the top 10% of VIC suburbs; rents are among the top 10% in VIC; SEIFA decile 10 puts it in the top 20% of Australia for socio-economic advantage.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Diamond Creek vs the VIC average and the national average, using population-weighted 2021 Census data.
| Metric | Diamond Creek | VIC avg | AU avg | Greater Melbourne |
|---|---|---|---|---|
| Household income/wk | $2,508 +VIC | $1,817 | $1,836 | $1,943 |
| Rent/wk | $430 +VIC | $375 | $390 | $404 |
| Mortgage/month | $2,167 +VIC | $1,933 | $1,958 | $2,100 |
| Median age | 39 | 46.0 | 45.0 | 39.0 |
| SEIFA decile | 10/10 +VIC | 6.0/10 | 6.0/10 | 9.0/10 |
| Unemployment | 3.4% -VIC | 5.0% | 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 3089 covers Diamond Creek, an inland suburb of Melbourne about 23 km from the city centre. It forms part of the Melbourne - North East region of Victoria. Local government services are provided by Nillumbik.
According to the 2021 Census, Diamond Creek has a population of 12,503 with a median age of 39. The median weekly household income is $2,508, above the VIC average. The unemployment rate is 3.4%, lower than the VIC average. The Indigenous population is 88 (0.7% of residents).
Housing in Diamond Creek includes a median weekly rent of $430, median monthly mortgage repayment of $2,167, with 4,158 total dwellings. These housing costs sit above the VIC average. Owner-occupied dwellings (owned or mortgaged) make up 89.9% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Diamond Creek scores in decile 10 out of 10, which is well above the national average.
There are 4 schools in the Diamond Creek area, including Diamond Valley College, Diamond Creek East Primary School, Diamond Creek Primary School and others.
Diamond Creek is part of the Nillumbik - Kinglake statistical area in Victoria.
Diamond Creek details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 3089 |
| State | Victoria (VIC) |
| Phone Area Code | 03 |
| Population (2021) | 12,503 |
| Median Age | 39 years |
| Median Household Income (Census 2021) | $2,508/week |
| Median Personal Income (Census 2021) | $983/week |
| Median Weekly Rent (Census 2021) | $430 |
| Median Monthly Mortgage (Census 2021) | $2,167 |
| Average Household Size | 2.9 persons |
| Area | 17.8 km² |
| Population Density | 701/km² |
| Total Dwellings | 4,158 |
| Australian Citizens | 94.0% |
| Indigenous Population | 88 (0.7%) |
| Unemployment Rate | 3.4% |
| SEIFA IRSAD Decile | 10/10 (well above average) |
| Latitude | -37.6666174 |
| Longitude | 145.1541397 |
| Distance from Melbourne | 23 km |
| Region (SA4) | Melbourne - North East |
| Area (SA3) | Nillumbik - Kinglake |
| Local Government | Nillumbik |
| Federal Electorate | Jagajaga |
| State Electorate | Eltham (North-Eastern Metropolitan) |
| Time Zone | AEST (UTC+10), Australia/Melbourne (standard time) |
Age Profile
Show counts
| 0–14 years | 2,419 (19.3%) |
| 15–24 years | 1,784 (14.3%) |
| 25–44 years | 3,019 (24.1%) |
| 45–64 years | 3,639 (29.1%) |
| 65+ years | 1,639 (13.1%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Asthma | 1,058 (8.5%) |
| Arthritis | 946 (7.6%) |
| Diabetes | 413 (3.3%) |
| Heart Disease | 400 (3.2%) |
| Cancer | 322 (2.6%) |
| Lung Condition | 138 (1.1%) |
| Dementia | 59 (0.5%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 75 (1.8%) |
| 1 vehicle | 854 (20.7%) |
| 2 vehicles | 1,873 (45.5%) |
| 3+ vehicles | 1,317 (32.0%) |
Schools in Diamond Creek
ACARA 2025 school profiles for schools located in Diamond Creek. ICSEA is shown where ACARA publishes it.
Suburbs Near Diamond Creek
More Diamond Creek 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.