Castlereagh at a glance
Population
1,248
Median age 38
The brief
What to know about Castlereagh.
The postcode for Castlereagh is 2749 (NSW), part of Greater Sydney.
Castlereagh (2749) sits in the Penrith region of NSW.
Castlereagh has roughly 1,248 residents, with a typical family-age mix. Households are predominantly owner-occupied.
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Day to day
What it’s like to live here.
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 10 government primary, 2 government secondary, 3 Catholic, 4 independent.
Who lives here
Demographics.
The 2021 Census put Castlereagh's population at 1,248, with a median age of 38. That sits as a typical family-age mix. Households are predominantly owner-occupied (80% own, 17% rent), which shapes everything from school catchment stability to how often properties turn over. The household mix skews family-dominated (86% family households, 13% lone person), so amenity decisions tend to follow what families want: parks, schools, supermarkets.
Population
1,248
Median age
38
Family households
86%
Lone person
13%
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)
$410/wk
Weekly rent (unit)
$428/wk
Owner occupied
80%
Renter occupied
17%
At a deeper level
1,248
Median age: 38
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Safety
Crime and safety.
84
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
Place
Location.
Amenities
Transport
Education
Schools in Castlereagh.
Local schools for Castlereagh
View the catchment for each school to find out more.
Government School Catchment
Castlereagh Public School
Henry Fulton Public School
Samuel Terry 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 Castlereagh.
- What is the Castlereagh postcode?
- Castlereagh is in the 2749 postcode, in NSW, in the Penrith City Council region.
- Where is Castlereagh?
- Castlereagh is a suburb of Sydney, in NSW 2749. It is part of the Greater Sydney area, in the Penrith City Council region.
- What is the average rent in Castlereagh?
- The median weekly rent for houses is $410, for units it's $428.
- What schools are in Castlereagh?
- There are 20 schools serving Castlereagh on this page, including Castlereagh Public School, The Lakes Christian College, St Paul's Grammar School.
- What suburbs are near Castlereagh?
- Castlereagh is close to Hawkesbury Heights, Winmalee, Yarramundi, Yellow Rock, Londonderry.
- What is the population of Castlereagh?
- The population of Castlereagh is approximately 1,248 (2021 Census). The median age is 38.
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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 →
Always dated
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