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South Australia · Postcode 5554
Thomas Plain postcode and suburb data
South Australia · Phone area code 08 · 126 km from Adelaide
Suburb snapshot
Thomas Plain 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 Thomas Plain ranks: household income is in the top 10% of SA suburbs; SEIFA decile 9 puts it in the top 20% of Australia for socio-economic advantage.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Thomas Plain vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Thomas Plain | SA avg | AU avg |
|---|---|---|---|
| Household income/wk | $2,374 +SA | $1,545 | $1,836 |
| Rent/wk | $100 -SA | $308 | $390 |
| Median age | 44 | 45.0 | 45.0 |
| SEIFA decile | 9/10 +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.
Thomas Plain is a locality 126 km from Adelaide in South Australia, classified as outer regional by the ABS. The postcode is 5554. It falls within the Barossa - Yorke - Mid North region. The local government area is Barunga West.
According to the 2021 Census, Thomas Plain has a population of 46 with a median age of 44. The median weekly household income is $2,374, above the SA average.
Housing in Thomas Plain includes a median weekly rent of $100, 17 total dwellings. Housing costs in the area sit below the SA average. Owner-occupied dwellings (owned or mortgaged) make up 66.7% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Thomas Plain scores in decile 9 out of 10, which is well above the national average.
Thomas Plain is part of the Yorke Peninsula statistical area in South Australia.
Thomas Plain details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5554 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 46 |
| Median Age | 44 years |
| Median Household Income (Census 2021) | $2,374/week |
| Median Personal Income (Census 2021) | $1,050/week |
| Median Weekly Rent (Census 2021) | $100 |
| Average Household Size | 2.8 persons |
| Area | 78.5 km² |
| Population Density | 1/km² |
| Total Dwellings | 17 |
| Australian Citizens | 84.8% |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 9/10 (well above average) |
| Latitude | -33.9453651 |
| Longitude | 137.9245298 |
| Distance from Adelaide | 126 km |
| Region (SA4) | Barossa - Yorke - Mid North |
| Area (SA3) | Yorke Peninsula |
| Local Government | Barunga West |
| Federal Electorate | Grey |
| State Electorate | Narungga |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 3 (6.5%) |
| 15–24 years | 12 (26.1%) |
| 25–44 years | 12 (26.1%) |
| 45–64 years | 18 (39.1%) |
| 65+ years | 6 (13.0%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 5 (10.9%) |
| Asthma | 3 (6.5%) |
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 Thomas Plain
Same Postcode (5554)
More Thomas Plain 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.