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Queensland · Postcode 4820
Grand Secret postcode and suburb data
Queensland · Phone area code 07 · 1073 km from Brisbane
Suburb snapshot
Grand Secret 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 Grand Secret ranks: SEIFA decile 2 places it in the bottom 20% of Australia for socio-economic advantage.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Grand Secret vs the QLD average and the national average, using population-weighted 2021 Census data.
| Metric | Grand Secret | QLD avg | AU avg |
|---|---|---|---|
| Household income/wk | $1,354 -QLD | $1,770 | $1,836 |
| Rent/wk | $230 -QLD | $380 | $390 |
| Mortgage/month | $1,296 -QLD | $1,774 | $1,958 |
| Median age | 49 | 44.0 | 45.0 |
| SEIFA decile | 2/10 -QLD | 4.0/10 | 6.0/10 |
| Unemployment | 9.0% +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.
Grand Secret is a very remote community in Queensland, with postcode 4820. It lies roughly 1073 km from Brisbane, classified by the ABS as very remote Australia. The area is administered by Charters Towers.
According to the 2021 Census, Grand Secret has a population of 151 with a median age of 49. The median weekly household income is $1,354, below the QLD average. The unemployment rate is 9.0%, higher than the QLD average. The Indigenous population is 31 (20.5% of residents).
Housing in Grand Secret includes a median weekly rent of $230, median monthly mortgage repayment of $1,296, with 62 total dwellings. Housing costs in the area sit below the QLD average. Rental properties account for 41.2% of dwellings.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Grand Secret scores in decile 2 out of 10, which is well below the national average.
Grand Secret is part of the Charters Towers - Ayr - Ingham statistical area in Queensland.
Grand Secret details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 4820 |
| State | Queensland (QLD) |
| Phone Area Code | 07 |
| Population (2021) | 151 |
| Median Age | 49 years |
| Median Household Income (Census 2021) | $1,354/week |
| Median Personal Income (Census 2021) | $628/week |
| Median Weekly Rent (Census 2021) | $230 |
| Median Monthly Mortgage (Census 2021) | $1,296 |
| Average Household Size | 2.2 persons |
| Area | 0.3 km² |
| Population Density | 453/km² |
| Total Dwellings | 62 |
| Australian Citizens | 88.7% |
| Indigenous Population | 31 (20.5%) |
| Unemployment Rate | 9.0% |
| SEIFA IRSAD Decile | 2/10 (well below average) |
| Latitude | -20.0731103 |
| Longitude | 146.2440372 |
| Distance from Brisbane | 1073 km |
| Region (SA4) | Townsville |
| Area (SA3) | Charters Towers - Ayr - Ingham |
| Local Government | Charters Towers |
| Federal Electorate | Kennedy |
| State Electorate | Traeger |
| Time Zone | AEST (UTC+10), Australia/Brisbane (standard time) |
Age Profile
Show counts
| 0–14 years | 24 (15.9%) |
| 15–24 years | 18 (11.9%) |
| 25–44 years | 31 (20.5%) |
| 45–64 years | 55 (36.4%) |
| 65+ years | 27 (17.9%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 24 (15.9%) |
| Asthma | 22 (14.6%) |
| Heart Disease | 10 (6.6%) |
| Lung Condition | 8 (5.3%) |
| Diabetes | 7 (4.6%) |
| Cancer | 3 (2.0%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 12 (19.4%) |
| 1 vehicle | 20 (32.3%) |
| 2 vehicles | 19 (30.6%) |
| 3+ vehicles | 11 (17.7%) |
Suburbs Near Grand Secret
Same Postcode (4820)
More Grand Secret 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.