Queensland · Postcode 4355
Plainby postcode and suburb data
Queensland · Phone area code 07 · 107 km from Brisbane
Suburb snapshot
Plainby 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.
Detailed comparison table
Plainby vs the QLD average and the national average, using population-weighted 2021 Census data.
| Metric | Plainby | QLD avg | AU avg |
|---|---|---|---|
| Household income/wk | $1,249 -QLD | $1,770 | $1,836 |
| Rent/wk | $280 -QLD | $380 | $390 |
| Mortgage/month | $2,167 +QLD | $1,774 | $1,958 |
| Median age | 48 | 44.0 | 45.0 |
| SEIFA decile | 4/10 ≈QLD | 4.0/10 | 6.0/10 |
| Unemployment | 0.0% -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.
Plainby is a locality 107 km from Brisbane in Queensland, classified as inner regional by the ABS. The postcode is 4355. It falls within the Darling Downs - Maranoa region. The local government area is Toowoomba.
According to the 2021 Census, Plainby has a population of 56 with a median age of 48. The median weekly household income is $1,249, below the QLD average. The Indigenous population is 7 (12.5% of residents).
Housing in Plainby includes a median weekly rent of $280, median monthly mortgage repayment of $2,167, with 25 total dwellings. These housing costs sit above the QLD average. Owner-occupied dwellings (owned or mortgaged) make up 77.3% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Plainby scores in decile 4 out of 10, which is below the national average.
Plainby is part of the Darling Downs - East statistical area in Queensland.
Plainby details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 4355 |
| State | Queensland (QLD) |
| Phone Area Code | 07 |
| Population (2021) | 56 |
| Median Age | 48 years |
| Median Household Income (Census 2021) | $1,249/week |
| Median Personal Income (Census 2021) | $675/week |
| Median Weekly Rent (Census 2021) | $280 |
| Median Monthly Mortgage (Census 2021) | $2,167 |
| Average Household Size | 2.3 persons |
| Area | 38.4 km² |
| Population Density | 1/km² |
| Total Dwellings | 25 |
| Australian Citizens | 87.5% |
| Indigenous Population | 7 (12.5%) |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 4/10 (below average) |
| Latitude | -27.2637974 |
| Longitude | 151.9715108 |
| Distance from Brisbane | 107 km |
| Region (SA4) | Darling Downs - Maranoa |
| Area (SA3) | Darling Downs - East |
| Local Government | Toowoomba |
| Federal Electorate | Maranoa |
| State Electorate | Nanango |
| Time Zone | AEST (UTC+10), Australia/Brisbane (standard time) |
Age Profile
Show counts
| 0–14 years | 7 (12.5%) |
| 15–24 years | 6 (10.7%) |
| 25–44 years | 15 (26.8%) |
| 45–64 years | 16 (28.6%) |
| 65+ years | 16 (28.6%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Cancer | 6 (10.7%) |
| Diabetes | 4 (7.1%) |
| Arthritis | 3 (5.4%) |
| Asthma | 3 (5.4%) |
| Heart Disease | 3 (5.4%) |
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 | 6 (27.3%) |
| 2 vehicles | 9 (40.9%) |
| 3+ vehicles | 7 (31.8%) |
Suburbs Near Plainby
Same Postcode (4355)
More Plainby 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.