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New South Wales · Postcode 2758
Mountain Lagoon postcode and suburb data
New South Wales · Phone area code 02 · 71 km from Sydney
Suburb snapshot
Mountain Lagoon 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.
Where Mountain Lagoon ranks: SEIFA decile 9 puts it in the top 20% of Australia for socio-economic advantage.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Mountain Lagoon vs the NSW average and the national average, using population-weighted 2021 Census data.
| Metric | Mountain Lagoon | NSW avg | AU avg |
|---|---|---|---|
| Household income/wk | $1,625 -NSW | $1,931 | $1,836 |
| Rent/wk | $360 -NSW | $445 | $390 |
| Mortgage/month | $2,167 ≈NSW | $2,247 | $1,958 |
| Median age | 55 | 45.0 | 45.0 |
| SEIFA decile | 9/10 +NSW | 6.0/10 | 6.0/10 |
| Unemployment | 0.0% -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.
Mountain Lagoon is a locality 71 km from Sydney in New South Wales, classified as outer regional by the ABS. The postcode is 2758. It falls within the Sydney - Outer West and Blue Mountains region. The local government area is Hawkesbury.
According to the 2021 Census, Mountain Lagoon has a population of 78 with a median age of 55. The median weekly household income is $1,625, below the NSW average. The Indigenous population is 4 (5.1% of residents).
Housing in Mountain Lagoon includes a median weekly rent of $360, median monthly mortgage repayment of $2,167, with 30 total dwellings. Housing costs in the area sit below the NSW average. Owner-occupied dwellings (owned or mortgaged) make up 90.0% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Mountain Lagoon scores in decile 9 out of 10, which is well above the national average.
Mountain Lagoon is part of the Blue Mountains statistical area in New South Wales.
Mountain Lagoon details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 2758 |
| State | New South Wales (NSW) |
| Phone Area Code | 02 |
| Population (2021) | 78 |
| Median Age | 55 years |
| Median Household Income (Census 2021) | $1,625/week |
| Median Personal Income (Census 2021) | $749/week |
| Median Weekly Rent (Census 2021) | $360 |
| Median Monthly Mortgage (Census 2021) | $2,167 |
| Average Household Size | 2.3 persons |
| Area | 54.7 km² |
| Population Density | 1/km² |
| Total Dwellings | 30 |
| Australian Citizens | 84.6% |
| Indigenous Population | 4 (5.1%) |
| Unemployment Rate | 0.0% |
| SEIFA IRSAD Decile | 9/10 (well above average) |
| Latitude | -33.4463774 |
| Longitude | 150.6275618 |
| Distance from Sydney | 71 km |
| Region (SA4) | Sydney - Outer West and Blue Mountains |
| Area (SA3) | Blue Mountains |
| Local Government | Hawkesbury |
| Federal Electorate | Macquarie |
| State Electorate | Hawkesbury |
| Time Zone | AEST (UTC+10), Australia/Sydney (standard time) |
Age Profile
Show counts
| 0–14 years | 3 (3.8%) |
| 15–24 years | 3 (3.8%) |
| 25–44 years | 3 (3.8%) |
| 45–64 years | 38 (48.7%) |
| 65+ years | 21 (26.9%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 15 (19.2%) |
| Heart Disease | 5 (6.4%) |
| Diabetes | 4 (5.1%) |
| Lung Condition | 3 (3.8%) |
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 (19.4%) |
| 2 vehicles | 10 (32.3%) |
| 3+ vehicles | 15 (48.4%) |
Suburbs Near Mountain Lagoon
Same Postcode (2758)
More Mountain Lagoon 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.