Castle Cove
NSWCastle Cove is a declining suburb in NSW with 2,643 residents.
- SAL code
- 10844
- SA2
- 121011683
- Population
- 2,643
- LGA
- Willoughby
Castle Cove, NSW had 2,643 residents at the 2021 Census, with the broader statistical area showing a 1.0% decline over the last five years. The predominant age group is 5-14 years, and the median age sits at 46. Households are most often couples with children, and those with a mortgage repay a median of $4,000 a month. Around 88.4% of homes are owner-occupied, with the largest single tenure being owned outright at 52.4%. Most dwellings are separate houses, making up 90.3% of the suburb's housing stock. The suburb has 6 parks and reserves mapped within its boundary. Source: ABS Census 2021 and Estimated Resident Population, with amenity counts from state Open Data and OpenStreetMap.
Population
?2,643
Suburb · Census 2021
5-Year Growth
-1.0%
3yr: +1.8% · 10yr: -1.2%
SA2 · 5yr
Household Income
$3,439/wk
Suburb · Census 2021 median
Median Age
46
Suburb · Census 2021
Socio-Economic Index
?10/10
SA2 · least disadvantaged
Unemployment
?2.8%
SA4 · Q4 2025
Schools
1
1 primary
Hospitals
No data for this suburb
Childcare services
?1
1 OSHC
Parks & green space
?6
Parks, reserves
Transport stops
?18
GTFS stops
Dwelling approvals
?6
Willoughby · Feb 2026
Median Weekly Rent
Based on NSW rental bond lodgements, aggregated at postcode level. All SALs sharing this postcode show the same median.
Median House Sale Price
Source: state Valuer-General (suburb-level quarterly medians).
→ Calculate stamp duty on this suburb's median price→ Estimate mortgage repayments→ Calculate rental yield (price + median rent)
Safety & Crime
2025 Q4Reported incidents from NSW police. Offence rates may not reflect all crime.
Population over time — Castle Cove - Northbridge (SA2)
ABS publishes annual estimates only at SA2; Castle Cove suburb alone is ~2,643 (Census 2021).
Growth at a Glance
Population grew from 12,615 to 13,592 over 24 years, averaging 0.3% per year.
Schools
1 in suburbGovernment school catchment
Intake zonePrimary
Castle Cove PS
Secondary
Killarney Hts HS100.0%
- Willoughby GHS 100.0%
Source: NSW Department of Education — School Intake Zones. Boundaries can be amended without notice; confirm with the school before relying on enrolment.
Profile
Census snapshot
Housing
Almost entirely detached houses (90.3%), owner-occupied (88%), built for families (41% are 4 bed).
Dwelling mix
Tenure
Number of bedrooms
Bushfire & flood risk
Hazard data is not yet available for NSW.
Source when available: NSW Rural Fire Service (BFPL) and NSW DPHI EPI Flood.
Planning zones
7 zones in suburb| Code | Zone | % covered | Area |
|---|---|---|---|
| C2 | ZoneEnvironmental | 41.6% | 0.98 km² |
| C4 | ZoneEnvironmental | 26.5% | 0.62 km² |
| R2 | ZoneResidential | 18.8% | 0.44 km² |
| RE1 | ZoneRecreation | 8.2% | 0.19 km² |
| SP2 | ZoneSpecial use | 1.3% | 0.03 km² |
| W1 | ZoneWaterway | 1.2% | 0.03 km² |
| E1 | ZoneEnvironmental | 0.3% | 7,758 m² |
Source: NSW DPHI EPI Land Zoning (ZONE_NSW/2026-04-29/1eccf1a530fa1be5) · As of Apr 2026. Zone boundaries are amended periodically; verify the exact property with the relevant council before relying on permitted use.