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Victoria · Postcode 3912
Somerville postcode and suburb data
Victoria · Phone area code 03 · 50 km from Melbourne
Suburb snapshot
Somerville 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.
Detailed comparison table
Somerville vs the VIC average and the national average, using population-weighted 2021 Census data.
| Metric | Somerville | VIC avg | AU avg | Greater Melbourne |
|---|---|---|---|---|
| Household income/wk | $1,781 ≈VIC | $1,817 | $1,836 | $1,943 |
| Rent/wk | $380 ≈VIC | $375 | $390 | $404 |
| Mortgage/month | $1,800 ≈VIC | $1,933 | $1,958 | $2,100 |
| Median age | 40 | 46.0 | 45.0 | 39.0 |
| SEIFA decile | 6/10 ≈VIC | 6.0/10 | 6.0/10 | 9.0/10 |
| Unemployment | 2.4% -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 3912 covers Somerville, an inland suburb of Melbourne about 50 km from the city centre. It forms part of the Mornington Peninsula region of Victoria. Local government services are provided by Mornington Peninsula.
According to the 2021 Census, Somerville has a population of 11,767 with a median age of 40. The median weekly household income is $1,781, close to the VIC average. The unemployment rate is 2.4%, lower than the VIC average. The Indigenous population is 115 (1.0% of residents).
Housing in Somerville includes a median weekly rent of $380, median monthly mortgage repayment of $1,800, with 4,322 total dwellings. Owner-occupied dwellings (owned or mortgaged) make up 83.3% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Somerville scores in decile 6 out of 10, which is around the national average.
There are 4 schools in the Somerville area, including Somerville Secondary College, Somerville Primary School, St Brendan's School and others.
Somerville is part of the Mornington Peninsula statistical area in Victoria.
Somerville details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 3912 |
| State | Victoria (VIC) |
| Phone Area Code | 03 |
| Population (2021) | 11,767 |
| Median Age | 40 years |
| Median Household Income (Census 2021) | $1,781/week |
| Median Personal Income (Census 2021) | $809/week |
| Median Weekly Rent (Census 2021) | $380 |
| Median Monthly Mortgage (Census 2021) | $1,800 |
| Average Household Size | 2.6 persons |
| Area | 38.7 km² |
| Population Density | 304/km² |
| Total Dwellings | 4,322 |
| Australian Citizens | 92.0% |
| Indigenous Population | 115 (1.0%) |
| Unemployment Rate | 2.4% |
| SEIFA IRSAD Decile | 6/10 (average) |
| Latitude | -38.226 |
| Longitude | 145.177 |
| Distance from Melbourne | 50 km |
| Region (SA4) | Mornington Peninsula |
| Area (SA3) | Mornington Peninsula |
| Local Government | Mornington Peninsula |
| Federal Electorate | Flinders |
| State Electorate | Hastings (Eastern Victoria) |
| Time Zone | AEST (UTC+10), Australia/Melbourne (standard time) |
Age Profile
Show counts
| 0–14 years | 2,191 (18.6%) |
| 15–24 years | 1,319 (11.2%) |
| 25–44 years | 3,000 (25.5%) |
| 45–64 years | 3,035 (25.8%) |
| 65+ years | 2,229 (18.9%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 1,225 (10.4%) |
| Asthma | 1,196 (10.2%) |
| Heart Disease | 546 (4.6%) |
| Diabetes | 530 (4.5%) |
| Cancer | 453 (3.8%) |
| Lung Condition | 221 (1.9%) |
| Dementia | 120 (1.0%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 130 (3.0%) |
| 1 vehicle | 1,208 (28.3%) |
| 2 vehicles | 1,773 (41.6%) |
| 3+ vehicles | 1,156 (27.1%) |
Schools in Somerville
ACARA 2025 school profiles for schools located in Somerville. ICSEA is shown where ACARA publishes it.
Suburbs Near Somerville
Same Postcode (3912)
More Somerville 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.