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South Australia · Postcode 5290
Mount Gambier postcode and suburb data
South Australia · Phone area code 08 · 376 km from Adelaide
Suburb snapshot
Mount Gambier at a glance vs SA
Fast facts and benchmark bars show the suburb's key postcode, Census, SEIFA, school and LGA signals in context.
Quick facts
Benchmarks against SA
Income, rent and SEIFA figures are from the ABS 2021 Census and are reported in 2021 dollars, not adjusted for subsequent inflation.
Where Mount Gambier ranks: SEIFA decile 1 places it in the bottom 20% of Australia for socio-economic advantage.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Mount Gambier vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Mount Gambier | SA avg | AU avg |
|---|---|---|---|
| Household income/wk | $1,197 -SA | $1,545 | $1,836 |
| Rent/wk | $220 -SA | $308 | $390 |
| Mortgage/month | $1,083 -SA | $1,558 | $1,958 |
| Median age | 41 | 45.0 | 45.0 |
| SEIFA decile | 1/10 -SA | 5.0/10 | 6.0/10 |
| Unemployment | 4.9% -SA | 6.0% | 5.0% |
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 Gambier (5290) is a coastal town in regional South Australia. It lies around 376 km from Adelaide by road. The locality is part of the Limestone Coast statistical area. It is administered by Mount Gambier.
According to the 2021 Census, Mount Gambier has a population of 25,591 with a median age of 41. The median weekly household income is $1,197, below the SA average. The unemployment rate is 4.9%, lower than the SA average. The Indigenous population is 728 (2.8% of residents).
Housing in Mount Gambier includes a median weekly rent of $220, median monthly mortgage repayment of $1,083, with 10,528 total dwellings. Housing costs in the area sit below the SA average. Owner-occupied dwellings (owned or mortgaged) make up 65.8% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Mount Gambier scores in decile 1 out of 10, which is well below the national average.
There are 10 schools in the Mount Gambier area, including Tenison Woods College, Grant High School, St Martins Lutheran College and others.
Mount Gambier is part of the Limestone Coast statistical area in South Australia.
Mount Gambier details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5290 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 25,591 |
| Median Age | 41 years |
| Median Household Income (Census 2021) | $1,197/week |
| Median Personal Income (Census 2021) | $691/week |
| Median Weekly Rent (Census 2021) | $220 |
| Median Monthly Mortgage (Census 2021) | $1,083 |
| Average Household Size | 2.2 persons |
| Area | 26.8 km² |
| Population Density | 955/km² |
| Total Dwellings | 10,528 |
| Australian Citizens | 90.0% |
| Indigenous Population | 728 (2.8%) |
| Unemployment Rate | 4.9% |
| SEIFA IRSAD Decile | 1/10 (well below average) |
| Latitude | -37.8256039 |
| Longitude | 140.7712393 |
| Distance from Adelaide | 376 km |
| Region (SA4) | South Australia - South East |
| Area (SA3) | Limestone Coast |
| Local Government | Mount Gambier |
| Federal Electorate | Barker |
| State Electorate | Mount Gambier |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 4,573 (17.9%) |
| 15–24 years | 3,003 (11.7%) |
| 25–44 years | 6,061 (23.7%) |
| 45–64 years | 6,356 (24.8%) |
| 65+ years | 5,595 (21.9%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 2,733 (10.7%) |
| Asthma | 2,708 (10.6%) |
| Diabetes | 1,735 (6.8%) |
| Heart Disease | 1,429 (5.6%) |
| Cancer | 845 (3.3%) |
| Lung Condition | 695 (2.7%) |
| Dementia | 271 (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 | 811 (7.8%) |
| 1 vehicle | 4,037 (38.9%) |
| 2 vehicles | 3,681 (35.5%) |
| 3+ vehicles | 1,851 (17.8%) |
Schools in Mount Gambier
ACARA 2025 school profiles for schools located in Mount Gambier. ICSEA is shown where ACARA publishes it.
Suburbs Near Mount Gambier
More Mount Gambier 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.