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Queensland · Postcode 4343
Mount Sylvia postcode and suburb data
Queensland · Phone area code 07 · 84 km from Brisbane
Suburb snapshot
Mount Sylvia 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 Mount Sylvia ranks: household income sits in the bottom 25% of QLD suburbs.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Mount Sylvia vs the QLD average and the national average, using population-weighted 2021 Census data.
| Metric | Mount Sylvia | QLD avg | AU avg |
|---|---|---|---|
| Household income/wk | $939 -QLD | $1,770 | $1,836 |
| Rent/wk | $250 -QLD | $380 | $390 |
| Mortgage/month | $650 -QLD | $1,774 | $1,958 |
| Median age | 45 | 44.0 | 45.0 |
| SEIFA decile | 7/10 +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.
Mount Sylvia is a locality 84 km from Brisbane in Queensland, classified as inner regional by the ABS. The postcode is 4343. It falls within the Toowoomba region. The local government area is Lockyer Valley.
According to the 2021 Census, Mount Sylvia has a population of 70 with a median age of 45. The median weekly household income is $939, below the QLD average.
Housing in Mount Sylvia includes a median weekly rent of $250, median monthly mortgage repayment of $650, with 25 total dwellings. Housing costs in the area sit below the QLD average. Owner-occupied dwellings (owned or mortgaged) make up 87.0% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Mount Sylvia scores in decile 7 out of 10, which is above the national average.
Mount Sylvia is served by Mount Sylvia State School.
Mount Sylvia is part of the Toowoomba statistical area in Queensland.
Mount Sylvia details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 4343 |
| State | Queensland (QLD) |
| Phone Area Code | 07 |
| Population (2021) | 70 |
| Median Age | 45 years |
| Median Household Income (Census 2021) | $939/week |
| Median Personal Income (Census 2021) | $442/week |
| Median Weekly Rent (Census 2021) | $250 |
| Median Monthly Mortgage (Census 2021) | $650 |
| Average Household Size | 2.4 persons |
| Area | 41.1 km² |
| Population Density | 2/km² |
| Total Dwellings | 25 |
| Australian Citizens | 77.1% |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 7/10 (above average) |
| Latitude | -27.7257552 |
| Longitude | 152.2194183 |
| Distance from Brisbane | 84 km |
| Region (SA4) | Toowoomba |
| Area (SA3) | Toowoomba |
| Local Government | Lockyer Valley |
| Federal Electorate | Wright |
| State Electorate | Lockyer |
| Time Zone | AEST (UTC+10), Australia/Brisbane (standard time) |
Age Profile
Show counts
| 0–14 years | 9 (12.9%) |
| 15–24 years | 15 (21.4%) |
| 25–44 years | 9 (12.9%) |
| 45–64 years | 25 (35.7%) |
| 65+ years | 19 (27.1%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 10 (14.3%) |
| Diabetes | 5 (7.1%) |
| Lung Condition | 5 (7.1%) |
| Asthma | 4 (5.7%) |
| Heart Disease | 3 (4.3%) |
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 (16.7%) |
| 2 vehicles | 6 (25.0%) |
| 3+ vehicles | 14 (58.3%) |
Schools in Mount Sylvia
ACARA 2025 school profiles for schools located in Mount Sylvia. ICSEA is shown where ACARA publishes it.
Suburbs Near Mount Sylvia
Same Postcode (4343)
More Mount Sylvia 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.