New South Wales · Postcode 2756
Cornwallis postcode and suburb data
New South Wales · Phone area code 02 · 48 km from Sydney
Suburb snapshot
Cornwallis 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
Cornwallis vs the NSW average and the national average, using population-weighted 2021 Census data.
| Metric | Cornwallis | NSW avg | AU avg | Greater Sydney |
|---|---|---|---|---|
| Household income/wk | $1,875 ≈NSW | $1,931 | $1,836 | $2,181 |
| Rent/wk | $250 -NSW | $445 | $390 | $506 |
| Mortgage/month | $4,300 +NSW | $2,247 | $1,958 | $2,587 |
| Median age | 45 | 45.0 | 45.0 | 39.0 |
| SEIFA decile | 7/10 ≈NSW | 6.0/10 | 6.0/10 | 10.0/10 |
| Unemployment | 0.0% -NSW | 5.0% | 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.
Cornwallis is a locality 48 km from Sydney in New South Wales, classified as outer regional by the ABS. The postcode is 2756. It falls within the Sydney - Outer West and Blue Mountains region. The local government area is Hawkesbury.
According to the 2021 Census, Cornwallis has a population of 44 with a median age of 45. The median weekly household income is $1,875, close to the NSW average. The Indigenous population is 3 (6.8% of residents).
Housing in Cornwallis includes a median weekly rent of $250, median monthly mortgage repayment of $4,300, with 14 total dwellings. These housing costs sit above the NSW average. Owner-occupied dwellings (owned or mortgaged) make up 100.0% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Cornwallis scores in decile 7 out of 10, which is above the national average.
Cornwallis is part of the Richmond - Windsor statistical area in New South Wales.
Cornwallis details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 2756 |
| State | New South Wales (NSW) |
| Phone Area Code | 02 |
| Population (2021) | 44 |
| Median Age | 45 years |
| Median Household Income (Census 2021) | $1,875/week |
| Median Personal Income (Census 2021) | $669/week |
| Median Weekly Rent (Census 2021) | $250 |
| Median Monthly Mortgage (Census 2021) | $4,300 |
| Average Household Size | 2.8 persons |
| Area | 7.5 km² |
| Population Density | 6/km² |
| Total Dwellings | 14 |
| Australian Citizens | 79.5% |
| Indigenous Population | 3 (6.8%) |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 7/10 (above average) |
| Latitude | -33.592 |
| Longitude | 150.812 |
| Distance from Sydney | 48 km |
| Region (SA4) | Sydney - Outer West and Blue Mountains |
| Area (SA3) | Richmond - Windsor |
| Local Government | Hawkesbury |
| Federal Electorate | Macquarie |
| State Electorate | Hornsby |
| Time Zone | AEST (UTC+10), Australia/Sydney (standard time) |
Age Profile
Show counts
| 0–14 years | 8 (18.2%) |
| 15–24 years | 8 (18.2%) |
| 25–44 years | 6 (13.6%) |
| 45–64 years | 20 (45.5%) |
| 65+ years | 5 (11.4%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Heart Disease | 3 (6.8%) |
| Cancer | 3 (6.8%) |
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 (50.0%) |
| 2 vehicles | 0 (0.0%) |
| 3+ vehicles | 6 (50.0%) |
Suburbs Near Cornwallis
Same Postcode (2756)
More Cornwallis 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.