South Australia · Postcode 5223
Middle River postcode and suburb data
South Australia · Phone area code 08 · 157 km from Adelaide
Suburb snapshot
Middle River 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.
Detailed comparison table
Middle River vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Middle River | SA avg | AU avg |
|---|---|---|---|
| Household income/wk | $1,124 -SA | $1,545 | $1,836 |
| Rent/wk | $210 -SA | $308 | $390 |
| Median age | 45 | 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.
Middle River is a remote community in South Australia, with postcode 5223. It lies roughly 157 km from Adelaide, classified by the ABS as remote Australia. The area is administered by Kangaroo Island.
According to the 2021 Census, Middle River has a population of 23 with a median age of 45. The median weekly household income is $1,124, below the SA average.
Housing in Middle River includes a median weekly rent of $210, 12 total dwellings. Housing costs in the area sit below the SA average. Rental properties account for 50.0% of dwellings.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Middle River scores in decile 6 out of 10, which is around the national average.
Middle River is part of the Fleurieu - Kangaroo Island statistical area in South Australia.
Middle River details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5223 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 23 |
| Median Age | 45 years |
| Median Household Income (Census 2021) | $1,124/week |
| Median Personal Income (Census 2021) | $866/week |
| Median Weekly Rent (Census 2021) | $210 |
| Average Household Size | 1.9 persons |
| Area | 85.9 km² |
| Population Density | 0/km² |
| Total Dwellings | 12 |
| Australian Citizens | 91.3% |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 6/10 (average) |
| Latitude | -35.6596903 |
| Longitude | 137.1223925 |
| Distance from Adelaide | 157 km |
| Region (SA4) | South Australia - South East |
| Area (SA3) | Fleurieu - Kangaroo Island |
| Local Government | Kangaroo Island |
| Federal Electorate | Mayo |
| State Electorate | Mawson |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 0 (0.0%) |
| 15–24 years | 0 (0.0%) |
| 25–44 years | 6 (26.1%) |
| 45–64 years | 4 (17.4%) |
| 65+ years | 4 (17.4%) |
Housing Tenure
SEIFA socio-economic index
Motor Vehicles per Dwelling
| No vehicle | 0 (0.0%) |
| 1 vehicle | 4 (40.0%) |
| 2 vehicles | 6 (60.0%) |
| 3+ vehicles | 0 (0.0%) |
Suburbs Near Middle River
Same Postcode (5223)
More Middle River 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.