Queensland · Postcode 4285
Birnam postcode and suburb data
Queensland · Phone area code 07 · 54 km from Brisbane
Suburb snapshot
Birnam at a glance vs QLD
Fast facts and benchmark bars show the suburb's key postcode, Census, SEIFA, school and LGA signals in context.
Quick facts
Benchmarks against QLD
Income, rent and SEIFA figures are from the ABS 2021 Census and are reported in 2021 dollars, not adjusted for subsequent inflation.
Where Birnam ranks: household income is in the top 25% of QLD suburbs; rents are among the top 10% in QLD.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Birnam vs the QLD average and the national average, using population-weighted 2021 Census data.
| Metric | Birnam | QLD avg | AU avg |
|---|---|---|---|
| Household income/wk | $2,107 +QLD | $1,770 | $1,836 |
| Rent/wk | $490 +QLD | $380 | $390 |
| Mortgage/month | $2,134 +QLD | $1,774 | $1,958 |
| Median age | 44 | 44.0 | 45.0 |
| SEIFA decile | 6/10 +QLD | 4.0/10 | 6.0/10 |
| Unemployment | 10.3% +QLD | 6.0% | 5.0% |
Green pill = at least 10% above the QLD average; red = at least 10% below; grey = within 10%. For unemployment, colour polarity is inverted: lower is better.
Birnam is a locality 54 km from Brisbane in Queensland, classified as inner regional by the ABS. The postcode is 4285. It falls within the Logan - Beaudesert region. The local government area is Scenic Rim.
According to the 2021 Census, Birnam has a population of 109 with a median age of 44. The median weekly household income is $2,107, above the QLD average. The unemployment rate is 10.3%, higher than the QLD average. The Indigenous population is 3 (2.8% of residents).
Housing in Birnam includes a median weekly rent of $490, median monthly mortgage repayment of $2,134, with 34 total dwellings. These housing costs sit above the QLD average. Owner-occupied dwellings (owned or mortgaged) make up 78.9% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Birnam scores in decile 6 out of 10, which is around the national average.
Birnam is part of the Jimboomba statistical area in Queensland.
Birnam details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 4285 |
| State | Queensland (QLD) |
| Phone Area Code | 07 |
| Population (2021) | 109 |
| Median Age | 44 years |
| Median Household Income (Census 2021) | $2,107/week |
| Median Personal Income (Census 2021) | $844/week |
| Median Weekly Rent (Census 2021) | $490 |
| Median Monthly Mortgage (Census 2021) | $2,134 |
| Average Household Size | 2.9 persons |
| Area | 20.9 km² |
| Population Density | 5/km² |
| Total Dwellings | 34 |
| Australian Citizens | 86.2% |
| Indigenous Population | 3 (2.8%) |
| Unemployment Rate | 10.3% |
| SEIFA IRSAD Decile | 6/10 (average) |
| Latitude | -27.95 |
| Longitude | 153.066667 |
| Distance from Brisbane | 54 km |
| Region (SA4) | Logan - Beaudesert |
| Area (SA3) | Jimboomba |
| Local Government | Scenic Rim |
| Federal Electorate | Wright |
| State Electorate | Scenic Rim |
| Time Zone | AEST (UTC+10), Australia/Brisbane (standard time) |
Age Profile
Show counts
| 0–14 years | 20 (18.3%) |
| 15–24 years | 11 (10.1%) |
| 25–44 years | 26 (23.9%) |
| 45–64 years | 27 (24.8%) |
| 65+ years | 26 (23.9%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 16 (14.7%) |
| Asthma | 9 (8.3%) |
| Heart Disease | 7 (6.4%) |
| Cancer | 5 (4.6%) |
| Diabetes | 4 (3.7%) |
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 | 4 (11.1%) |
| 2 vehicles | 15 (41.7%) |
| 3+ vehicles | 17 (47.2%) |
Suburbs Near Birnam
Same Postcode (4285)
More Birnam 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.