New South Wales · Postcode 2421
Trevallyn postcode and suburb data
New South Wales · Phone area code 02 · 406 km from Sydney
Suburb snapshot
Trevallyn at a glance vs NSW
Fast facts and benchmark bars show the suburb's key postcode, Census, SEIFA, school and LGA signals in context.
Quick facts
Benchmarks against NSW
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
Trevallyn vs the NSW average and the national average, using population-weighted 2021 Census data.
| Metric | Trevallyn | NSW avg | AU avg |
|---|---|---|---|
| Household income/wk | $1,614 -NSW | $1,931 | $1,836 |
| Rent/wk | $300 -NSW | $445 | $390 |
| Mortgage/month | $1,387 -NSW | $2,247 | $1,958 |
| Median age | 40 | 45.0 | 45.0 |
| SEIFA decile | 7/10 ≈NSW | 6.0/10 | 6.0/10 |
| Unemployment | 4.8% ≈NSW | 5.0% | 5.0% |
Green pill = at least 10% above the NSW average; red = at least 10% below; grey = within 10%. For unemployment, colour polarity is inverted: lower is better.
Trevallyn is a locality 406 km from Sydney in New South Wales, classified as inner regional by the ABS. The postcode is 2421. It falls within the Hunter Valley exc Newcastle region. The local government area is West Tamar.
According to the 2021 Census, Trevallyn has a population of 4,826 with a median age of 40. The median weekly household income is $1,614, below the NSW average. The unemployment rate is 4.8%. The Indigenous population is 116 (2.4% of residents).
Housing in Trevallyn includes a median weekly rent of $300, median monthly mortgage repayment of $1,387, with 1,922 total dwellings. Housing costs in the area sit below the NSW average. Owner-occupied dwellings (owned or mortgaged) make up 73.8% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Trevallyn scores in decile 7 out of 10, which is above the national average.
Trevallyn is part of the Maitland statistical area in New South Wales.
Trevallyn details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 2421 |
| State | New South Wales (NSW) |
| Phone Area Code | 02 |
| Population (2021) | 4,826 |
| Median Age | 40 years |
| Median Household Income (Census 2021) | $1,614/week |
| Median Personal Income (Census 2021) | $845/week |
| Median Weekly Rent (Census 2021) | $300 |
| Median Monthly Mortgage (Census 2021) | $1,387 |
| Average Household Size | 2.4 persons |
| Area | 9.7 km² |
| Population Density | 496/km² |
| Total Dwellings | 1,922 |
| Australian Citizens | 90.7% |
| Indigenous Population | 116 (2.4%) |
| Unemployment Rate | 4.8% |
| SEIFA IRSAD Decile | 7/10 (above average) |
| Latitude | -30.277 |
| Longitude | 150.418 |
| Distance from Sydney | 406 km |
| Region (SA4) | Hunter Valley exc Newcastle |
| Area (SA3) | Maitland |
| Local Government | West Tamar |
| Federal Electorate | Lyne |
| State Electorate | Upper Hunter |
| Time Zone | AEST (UTC+10), Australia/Sydney (standard time) |
Age Profile
Show counts
| 0–14 years | 888 (18.4%) |
| 15–24 years | 548 (11.4%) |
| 25–44 years | 1,257 (26.0%) |
| 45–64 years | 1,308 (27.1%) |
| 65+ years | 842 (17.4%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 451 (9.3%) |
| Asthma | 445 (9.2%) |
| Diabetes | 174 (3.6%) |
| Heart Disease | 163 (3.4%) |
| Cancer | 156 (3.2%) |
| Lung Condition | 77 (1.6%) |
| Dementia | 10 (0.2%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 81 (4.3%) |
| 1 vehicle | 659 (34.7%) |
| 2 vehicles | 788 (41.5%) |
| 3+ vehicles | 372 (19.6%) |
Suburbs Near Trevallyn
Same Postcode (2421)
More Trevallyn 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.