St Marys at a glance
Walk score
100
Walker's paradise
Population
13.3k
Median age 34
The brief
What to know about St Marys.
The postcode for St Marys is 2760 (NSW), part of Greater Sydney.
St Marys (2760) sits in the Blacktown region of NSW.
St Marys has roughly 13,256 residents, with a young-family demographic. Households are renter-heavy. Day-to-day life here is very walkable, with most errands manageable on foot.
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Day to day
What it’s like to live here.
St Marys scores 100/100 on walkability, which makes it very walkable with limited public transport. Coffee, groceries and a meal out are mostly walking-distance, which keeps a household viable on one car.
Summer days here average around 26°C (mild), winter mornings around 8°C (mild). Annual rainfall lands at about 1302mm. Data comes from the Bureau of Meteorology's Sydney (Observatory Hill) station, 32.5km away.
Schooling within or near the suburb covers 9 government primary, 4 government secondary, 2 Catholic, 2 independent.
Who lives here
Demographics.
The 2021 Census put St Marys's population at 13,256, with a median age of 34. That sits as a young-family demographic. Households are renter-heavy (44% own, 53% rent), which shapes everything from school catchment stability to how often properties turn over. The household mix skews family-dominated (65% family households, 31% lone person), so amenity decisions tend to follow what families want: parks, schools, supermarkets.
Population
13,256
Median age
34
Family households
65%
Lone person
31%
Demographics data as of May 2026· ABS 2021 Census
Market
The price of a home here.
Median house price
Verified median pending
We don't yet have a verified suburb-level median for this market. We're working on a data partner; in the meantime, treat the state-level figures as a guide only. How we source data.
Sales data as of May 2026· rental-nsw
Rental and ownership
Weekly rent (house)
$380/wk
Weekly rent (unit)
$365/wk
Owner occupied
44%
Renter occupied
53%
At a deeper level
13,256
Median age: 34
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Safety
Crime and safety.
3,392
total offences in 2025
Top offence categories
Crime statistics are reported at LGA level and may cover a broader area than this suburb.
Source: State Police Open Data
Crime data as of January 2025· State Police Open Data
Getting around
Walkability.
100
0
100
Scores calculated from OpenStreetMap data (ODbL)
Walkability data as of May 2026· OpenStreetMap
Place
Location.
Amenities
Transport
Education
Schools in St Marys.
Local schools for St Marys
View the catchment for each school to find out more.
Government School Catchment
St Marys Public School
St Marys Senior High School
St Marys South Public School
© ACARA, licensed under CC BY 4.0.
Climate
Weather year-round.
Annual Rainfall
1302 mm
Hottest Month (avg max)
26.2°C
Coldest Month (avg min)
8.4°C
Monthly Rainfall (mm)
Weather data from BOM station Sydney (Observatory Hill) (33 km away)
Climate data as of May 2026· Bureau of Meteorology
Frequently asked
About St Marys.
- What is the St Marys postcode?
- St Marys is in the 2760 postcode, in NSW, in the Blacktown City Council region.
- Where is St Marys?
- St Marys is a suburb of Sydney, in NSW 2760. It is part of the Greater Sydney area, in the Blacktown City Council region.
- What is the average rent in St Marys?
- The median weekly rent for houses is $380, for units it's $365.
- What schools are in St Marys?
- There are 20 schools serving St Marys on this page, including St Marys Public School, Our Lady of The Rosary Primary School, St Marys Senior High School.
- How walkable is St Marys?
- St Marys has a Walk Score of 100 out of 100, very walkable. transit score 0, bike score 100.
- What suburbs are near St Marys?
- St Marys is close to St Marys South, St Marys East, Oxley Park, Claremont Meadows, North St Marys.
- What is the population of St Marys?
- The population of St Marys is approximately 13,256 (2021 Census). The median age is 34.
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Side by side
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Sources cited
Median, growth and rental data from state revenue offices and ABS. Census from ABS 2021. Climate from BoM. Hazard from Geoscience Australia. School data from ACARA. Crime from state police open data. Full methodology →
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