South Australia · Postcode 5575
Marion Bay postcode and suburb data
South Australia · Phone area code 08 · 152 km from Adelaide
Suburb snapshot
Marion Bay 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 Marion Bay ranks: household income sits in the bottom 25% of SA suburbs; SEIFA decile 1 places it in the bottom 20% of Australia for socio-economic advantage.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Marion Bay vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Marion Bay | SA avg | AU avg |
|---|---|---|---|
| Household income/wk | $838 -SA | $1,545 | $1,836 |
| Rent/wk | $200 -SA | $308 | $390 |
| Mortgage/month | $867 -SA | $1,558 | $1,958 |
| Median age | 54 | 45.0 | 45.0 |
| SEIFA decile | 1/10 -SA | 5.0/10 | 6.0/10 |
| Unemployment | 3.4% -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.
Marion Bay is a remote community in South Australia, with postcode 5575. It lies roughly 152 km from Adelaide, classified by the ABS as remote Australia. The area is administered by Yorke Peninsula.
According to the 2021 Census, Marion Bay has a population of 210 with a median age of 54. The median weekly household income is $838, below the SA average. The unemployment rate is 3.4%, lower than the SA average. The Indigenous population is 3 (1.4% of residents).
Housing in Marion Bay includes a median weekly rent of $200, median monthly mortgage repayment of $867, with 88 total dwellings. Housing costs in the area sit below the SA average. Owner-occupied dwellings (owned or mortgaged) make up 81.2% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Marion Bay scores in decile 1 out of 10, which is well below the national average.
Marion Bay is part of the Yorke Peninsula statistical area in South Australia.
Marion Bay details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5575 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 210 |
| Median Age | 54 years |
| Median Household Income (Census 2021) | $838/week |
| Median Personal Income (Census 2021) | $539/week |
| Median Weekly Rent (Census 2021) | $200 |
| Median Monthly Mortgage (Census 2021) | $867 |
| Average Household Size | 2 persons |
| Area | 300.3 km² |
| Population Density | 1/km² |
| Total Dwellings | 88 |
| Australian Citizens | 86.2% |
| Indigenous Population | 3 (1.4%) |
| Unemployment Rate | 3.4% |
| SEIFA IRSAD Decile | 1/10 (well below average) |
| Latitude | -35.2398829 |
| Longitude | 136.9795994 |
| Distance from Adelaide | 152 km |
| Region (SA4) | Barossa - Yorke - Mid North |
| Area (SA3) | Yorke Peninsula |
| Local Government | Yorke Peninsula |
| Federal Electorate | Grey |
| State Electorate | Narungga |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 22 (10.5%) |
| 15–24 years | 19 (9.0%) |
| 25–44 years | 41 (19.5%) |
| 45–64 years | 87 (41.4%) |
| 65+ years | 34 (16.2%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 31 (14.8%) |
| Cancer | 15 (7.1%) |
| Asthma | 11 (5.2%) |
| Heart Disease | 10 (4.8%) |
| Diabetes | 6 (2.9%) |
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 | 30 (38.5%) |
| 2 vehicles | 33 (42.3%) |
| 3+ vehicles | 15 (19.2%) |
Suburbs Near Marion Bay
Same Postcode (5575)
More Marion Bay 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.