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Victoria · Postcode 3533
Sea Lake postcode and suburb data
Victoria · Phone area code 03 · 318 km from Melbourne
Suburb snapshot
Sea Lake 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 Sea Lake ranks: household income sits in the bottom 10% of VIC suburbs; SEIFA decile 2 places it in the bottom 20% of Australia for socio-economic advantage.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Sea Lake vs the VIC average and the national average, using population-weighted 2021 Census data.
| Metric | Sea Lake | VIC avg | AU avg |
|---|---|---|---|
| Household income/wk | $883 -VIC | $1,817 | $1,836 |
| Rent/wk | $140 -VIC | $375 | $390 |
| Mortgage/month | $650 -VIC | $1,933 | $1,958 |
| Median age | 51 | 46.0 | 45.0 |
| SEIFA decile | 2/10 -VIC | 6.0/10 | 6.0/10 |
| Unemployment | 4.8% ≈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.
Sea Lake is a locality 318 km from Melbourne in Victoria, classified as outer regional by the ABS. The postcode is 3533. It falls within the North West region. The local government area is Buloke.
According to the 2021 Census, Sea Lake has a population of 619 with a median age of 51. The median weekly household income is $883, below the VIC average. The unemployment rate is 4.8%. The Indigenous population is 11 (1.8% of residents).
Housing in Sea Lake includes a median weekly rent of $140, median monthly mortgage repayment of $650, with 268 total dwellings. Housing costs in the area sit below the VIC average. Owner-occupied dwellings (owned or mortgaged) make up 84.5% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Sea Lake scores in decile 2 out of 10, which is well below the national average.
Schools in Sea Lake include Tyrrell College and St Mary's School.
Sea Lake is part of the Murray River - Swan Hill statistical area in Victoria.
Sea Lake details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 3533 |
| State | Victoria (VIC) |
| Phone Area Code | 03 |
| Population (2021) | 619 |
| Median Age | 51 years |
| Median Household Income (Census 2021) | $883/week |
| Median Personal Income (Census 2021) | $524/week |
| Median Weekly Rent (Census 2021) | $140 |
| Median Monthly Mortgage (Census 2021) | $650 |
| Average Household Size | 2.1 persons |
| Area | 219.7 km² |
| Population Density | 3/km² |
| Total Dwellings | 268 |
| Australian Citizens | 90.5% |
| Indigenous Population | 11 (1.8%) |
| Unemployment Rate | 4.8% |
| SEIFA IRSAD Decile | 2/10 (well below average) |
| Latitude | -35.5055413 |
| Longitude | 142.8526896 |
| Distance from Melbourne | 318 km |
| Region (SA4) | North West |
| Area (SA3) | Murray River - Swan Hill |
| Local Government | Buloke |
| Federal Electorate | Mallee |
| State Electorate | Murray Plains (Northern Victoria) |
| Time Zone | AEST (UTC+10), Australia/Melbourne (standard time) |
Age Profile
Show counts
| 0–14 years | 92 (14.9%) |
| 15–24 years | 61 (9.9%) |
| 25–44 years | 113 (18.3%) |
| 45–64 years | 177 (28.6%) |
| 65+ years | 175 (28.3%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 105 (17.0%) |
| Asthma | 80 (12.9%) |
| Diabetes | 50 (8.1%) |
| Heart Disease | 42 (6.8%) |
| Lung Condition | 25 (4.0%) |
| Cancer | 21 (3.4%) |
| Dementia | 7 (1.1%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 16 (6.3%) |
| 1 vehicle | 101 (39.9%) |
| 2 vehicles | 74 (29.2%) |
| 3+ vehicles | 62 (24.5%) |
Schools in Sea Lake
ACARA 2025 school profiles for schools located in Sea Lake. ICSEA is shown where ACARA publishes it.
Suburbs Near Sea Lake
Same Postcode (3533)
More Sea Lake 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.