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Mosman
New South Wales · Sydney - North Sydney and Hornsby · 28,329 people · 3 suburbs · 2 postcodes
Mosman at a glance
Map shows the Mosman LGA boundary in blue with a marker per suburb. Hover for suburb name, click for details.
Marker colour reflects SEIFA IRSAD decile: ● 1-2 (most disadvantaged), ● 3-4, ● 5-6, ● 7-8, ● 9-10 (most advantaged).
Boundary source: ABS ASGS 2021. Map tiles: OpenStreetMap contributors.
Mosman is a metropolitan Local Government Area in New South Wales, in the Sydney region. It covers 3 suburbs across 2 postcodes and an area of 9 km². Mosman has a population of 28,329 , ranking #62 most populous in NSW. The most populous suburb is Mosman (28,329 residents), and the highest median household income is in Mosman at $2,892/week. The LGA-wide median household income is $2,892/week and median age is 45.0. About 35.3% of residents were born overseas and 16.5% speak a language other than English at home.
Who lives here
Age structure
Show counts
| 0–14 years | 4,611 (16.3%) |
| 15–24 years | 2,965 (10.5%) |
| 25–44 years | 6,584 (23.2%) |
| 45–64 years | 7,965 (28.1%) |
| 65+ years | 6,205 (21.9%) |
How they live
Housing tenure
Dwelling type mix
Work and learning
Schools in Mosman
7 schools across Mosman: 57.1% Government, 14.3% Catholic, 28.6% Independent. The NSW average is 69.6% / 16.9% / 13.5%. Schools here have a median ICSEA of 1162 (range 1126 to 1206). NSW median is 1005; national mean is 1000.
Sector mix
Type breakdown
ICSEA range
ICSEA (Index of Community Socio-Educational Advantage) summarises the socio-economic background of each school's families. Higher values indicate more advantage. Source: ACARA 2025.
All 7 schools in Mosman, sorted by enrolment:
| School | Sector | Type | Suburb | Students | ICSEA |
|---|---|---|---|---|---|
| Mosman High School | Government | Secondary | Mosman | 1,087 | 1126 |
| Queenwood | Independent | Combined | Mosman | 816 | 1172 |
| Mosman Public School | Government | Primary | Mosman | 458 | 1157 |
| Middle Harbour Public School | Government | Primary | Mosman | 423 | 1162 |
| Sacred Heart Catholic Primary School | Catholic | Primary | Mosman | 373 | 1189 |
| Mosman Church of England Preparatory School | Independent | Primary | Mosman | 221 | 1206 |
| Beauty Point Public School | Government | Primary | Mosman | 205 | 1154 |
Source: ACARA School Profiles 2025. ICSEA shown where reported; some schools (notably small primaries) do not publish ICSEA.
SEIFA socio-economic indexes
SEIFA 2021 ranks Australian areas across four dimensions. Scores are population-weighted averages of suburb-level SEIFA scores within Mosman. Higher scores indicate more advantage; the national mean is 1000.
IRSAD
Relative socio-economic advantage and disadvantage
IRSD
Relative disadvantage only (lower = more disadvantaged)
IER
Economic resources: income, wealth, housing
IEO
Education and occupation: qualifications, skill levels
Suburbs in Mosman
Mosman contains 3 suburbs and 2 postcodes. Sorted by population.
| Suburb | Postcode | Population | Median income | Median age |
|---|---|---|---|---|
| Mosman | 2088 | 28,329 | $2,892/wk | 45 |
| Hmas Penguin | 2091 | |||
| Spit Junction | 2088 |
Postcodes covered
Compare Mosman with neighbouring LGAs
Side-by-side demographic and socio-economic snapshot of Mosman and its closest neighbouring LGAs.
| LGA | Population | Median age | Median HH income | SEIFA IRSAD | % renting | % overseas-born |
|---|---|---|---|---|---|---|
| Mosman (NSW) | 28,329 | 45.0 | $2,892/wk | 1169 | 34.1% | 35.3% |
| North Sydney | 73,701 | 38.9 | $2,589/wk | 1164 | 54.1% | 41.2% |
| Northern Beaches | 263,532 | 41.9 | $2,767/wk | 1125 | 27.8% | 30.2% |
Services and amenities
Frequently asked questions about Mosman
What is the population of Mosman?
The 2021 Census recorded 28,329 people living in Mosman, across 3 suburbs.
What suburbs are in Mosman?
Mosman contains 3 suburbs. The most populous are Mosman, Hmas Penguin, Spit Junction.See the full list in the Suburbs section above.
What postcodes are in Mosman?
Mosman covers 2 postcodes: 2088, 2091.
What is the median household income in Mosman?
The population-weighted median household income across Mosman is $2,892 per week (2021 Census), ranking #6 of 130 NSW LGAs.
How many schools are in Mosman?
Mosman has 7 schools, including 4 government, 1 Catholic, and 2 independent schools (ACARA 2025).
What is the SEIFA score for Mosman?
Mosman has a population-weighted SEIFA IRSAD score of 1169, where the national average is 1000. Higher scores indicate more relative advantage.
Page last reviewed . Data sources: Australian Bureau of Statistics 2021 Census (CC BY 4.0), SEIFA 2021 (IRSD, IRSAD, IER, IEO), ACARA School Profiles 2025, ABS ASGS 2021 LGA boundaries. How this data is sourced.