South Australia · Postcode 5291
Square Mile postcode and suburb data
South Australia · Phone area code 08 · 382 km from Adelaide
Suburb snapshot
Square Mile 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 Square Mile ranks: household income is in the top 10% of SA suburbs.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Square Mile vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Square Mile | SA avg | AU avg |
|---|---|---|---|
| Household income/wk | $3,624 +SA | $1,545 | $1,836 |
| Rent/wk | $180 -SA | $308 | $390 |
| Mortgage/month | $1,950 +SA | $1,558 | $1,958 |
| Median age | 47 | 45.0 | 45.0 |
| SEIFA decile | 6/10 ≈SA | 5.0/10 | 6.0/10 |
| Unemployment | 0.0% -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.
Square Mile (5291) is a coastal town in regional South Australia. It lies around 382 km from Adelaide by road. The locality is part of the Limestone Coast statistical area. It is administered by Grant.
According to the 2021 Census, Square Mile has a population of 31 with a median age of 47. The median weekly household income is $3,624, above the SA average.
Housing in Square Mile includes a median weekly rent of $180, median monthly mortgage repayment of $1,950, with 9 total dwellings. These housing costs sit above the SA average. Owner-occupied dwellings (owned or mortgaged) make up 100.0% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Square Mile scores in decile 6 out of 10, which is around the national average.
Square Mile is part of the Limestone Coast statistical area in South Australia.
Square Mile details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5291 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 31 |
| Median Age | 47 years |
| Median Household Income (Census 2021) | $3,624/week |
| Median Personal Income (Census 2021) | $1,292/week |
| Median Weekly Rent (Census 2021) | $180 |
| Median Monthly Mortgage (Census 2021) | $1,950 |
| Average Household Size | 3.4 persons |
| Area | 2.7 km² |
| Population Density | 12/km² |
| Total Dwellings | 9 |
| Australian Citizens | 103.2% |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 6/10 (average) |
| Latitude | -37.8717159 |
| Longitude | 140.8020078 |
| Distance from Adelaide | 382 km |
| Region (SA4) | South Australia - South East |
| Area (SA3) | Limestone Coast |
| Local Government | Grant |
| Federal Electorate | Barker |
| State Electorate | Mount Gambier |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 3 (9.7%) |
| 15–24 years | 8 (25.8%) |
| 25–44 years | 0 (0.0%) |
| 45–64 years | 19 (61.3%) |
| 65+ years | 6 (19.4%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 4 (12.9%) |
| Diabetes | 4 (12.9%) |
| Asthma | 4 (12.9%) |
| Heart Disease | 3 (9.7%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 0 (0.0%) |
| 1 vehicle | 0 (0.0%) |
| 2 vehicles | 3 (27.3%) |
| 3+ vehicles | 8 (72.7%) |
Suburbs Near Square Mile
Same Postcode (5291)
More Square Mile 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.