South Australia · Postcode 5255
Lake Plains postcode and suburb data
South Australia · Phone area code 08 · 62 km from Adelaide
Suburb snapshot
Lake Plains 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 Lake Plains ranks: household income sits in the bottom 25% of SA suburbs.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Lake Plains vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Lake Plains | SA avg | AU avg |
|---|---|---|---|
| Household income/wk | $850 -SA | $1,545 | $1,836 |
| Rent/wk | $127 -SA | $308 | $390 |
| Mortgage/month | $2,167 +SA | $1,558 | $1,958 |
| Median age | 47 | 45.0 | 45.0 |
| SEIFA decile | 8/10 +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.
Lake Plains is a locality 62 km from Adelaide in South Australia, classified as inner regional by the ABS. The postcode is 5255. It falls within the South Australia - South East region. The local government area is Alexandrina.
According to the 2021 Census, Lake Plains has a population of 48 with a median age of 47. The median weekly household income is $850, below the SA average. The Indigenous population is 3 (6.2% of residents).
Housing in Lake Plains includes a median weekly rent of $127, median monthly mortgage repayment of $2,167, with 19 total dwellings. These housing costs sit above the SA average. Rental properties account for 42.9% of dwellings.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Lake Plains scores in decile 8 out of 10, which is above the national average.
Lake Plains is part of the Murray and Mallee statistical area in South Australia.
Lake Plains details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5255 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 48 |
| Median Age | 47 years |
| Median Household Income (Census 2021) | $850/week |
| Median Personal Income (Census 2021) | $574/week |
| Median Weekly Rent (Census 2021) | $127 |
| Median Monthly Mortgage (Census 2021) | $2,167 |
| Average Household Size | 2.6 persons |
| Area | 29.9 km² |
| Population Density | 2/km² |
| Total Dwellings | 19 |
| Australian Citizens | 81.2% |
| Indigenous Population | 3 (6.2%) |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 8/10 (above average) |
| Latitude | -35.3637739 |
| Longitude | 139.0340556 |
| Distance from Adelaide | 62 km |
| Region (SA4) | South Australia - South East |
| Area (SA3) | Murray and Mallee |
| Local Government | Alexandrina |
| Federal Electorate | Mayo |
| State Electorate | Hammond |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 12 (25.0%) |
| 15–24 years | 5 (10.4%) |
| 25–44 years | 6 (12.5%) |
| 45–64 years | 16 (33.3%) |
| 65+ years | 4 (8.3%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 9 (18.8%) |
| Asthma | 7 (14.6%) |
| Cancer | 5 (10.4%) |
| Diabetes | 3 (6.2%) |
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 | 9 (42.9%) |
| 2 vehicles | 5 (23.8%) |
| 3+ vehicles | 7 (33.3%) |
Suburbs Near Lake Plains
Same Postcode (5255)
More Lake Plains 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.