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South Australia · Postcode 5171
Tatachilla postcode and suburb data
South Australia · Phone area code 08 · 35 km from Adelaide
Suburb snapshot
Tatachilla 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 Tatachilla ranks: household income is in the top 25% 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
Tatachilla vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Tatachilla | SA avg | AU avg | Greater Adelaide |
|---|---|---|---|---|
| Household income/wk | $2,075 +SA | $1,545 | $1,836 | $1,620 |
| Rent/wk | $280 ≈SA | $308 | $390 | $329 |
| Mortgage/month | $2,084 +SA | $1,558 | $1,958 | $1,666 |
| Median age | 45 | 45.0 | 45.0 | 42.0 |
| SEIFA decile | 9/10 +SA | 5.0/10 | 6.0/10 | 7.0/10 |
| Unemployment | 5.6% ≈SA | 6.0% | 5.0% | 6.0% |
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.
Tatachilla is a locality 35 km from Adelaide in South Australia, classified as inner regional by the ABS. The postcode is 5171. It falls within the Adelaide - South region. The local government area is Onkaparinga.
According to the 2021 Census, Tatachilla has a population of 231 with a median age of 45. The median weekly household income is $2,075, above the SA average. The unemployment rate is 5.6%.
Housing in Tatachilla includes a median weekly rent of $280, median monthly mortgage repayment of $2,084, with 82 total dwellings. These housing costs sit above the SA average. Owner-occupied dwellings (owned or mortgaged) make up 94.8% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Tatachilla scores in decile 9 out of 10, which is well above the national average.
Tatachilla is part of the Onkaparinga statistical area in South Australia.
Tatachilla details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5171 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 231 |
| Median Age | 45 years |
| Median Household Income (Census 2021) | $2,075/week |
| Median Personal Income (Census 2021) | $959/week |
| Median Weekly Rent (Census 2021) | $280 |
| Median Monthly Mortgage (Census 2021) | $2,084 |
| Average Household Size | 2.9 persons |
| Area | 10.1 km² |
| Population Density | 23/km² |
| Total Dwellings | 82 |
| Australian Citizens | 93.9% |
| Unemployment Rate | 5.6% |
| SEIFA IRSAD Decile | 9/10 (well above average) |
| Latitude | -35.2369804 |
| Longitude | 138.5096886 |
| Distance from Adelaide | 35 km |
| Region (SA4) | Adelaide - South |
| Area (SA3) | Onkaparinga |
| Local Government | Onkaparinga |
| Federal Electorate | Mayo |
| State Electorate | Mawson |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 48 (20.8%) |
| 15–24 years | 30 (13.0%) |
| 25–44 years | 38 (16.5%) |
| 45–64 years | 81 (35.1%) |
| 65+ years | 37 (16.0%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 27 (11.7%) |
| Asthma | 17 (7.4%) |
| Diabetes | 10 (4.3%) |
| Heart Disease | 9 (3.9%) |
| Cancer | 9 (3.9%) |
| Lung Condition | 6 (2.6%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 6 (6.8%) |
| 1 vehicle | 14 (15.9%) |
| 2 vehicles | 38 (43.2%) |
| 3+ vehicles | 30 (34.1%) |
Suburbs Near Tatachilla
Same Postcode (5171)
More Tatachilla 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.