Thornleigh, NSW
Suburb profile from official open data — demographics, market signals, schools and safety.
At a glance
- Population
- 8,898
- Median age
- 40
- Household income
- $2,681/wk
- Owner-occupied
- 75%
- Renting
- 23%
- Socio-economic advantage
- Decile 10/10 in NSW
- Nearest train station
- Thornleigh Station · 0.7 km
- Nearest emergency dept
- Hornsby Ku-ring-gai Hospital · 4 km
Sources: ABS Census 2021 & SEIFA 2021 (CC BY 4.0); distances are straight-line from the suburb's address centroid.
Property market — real sales
Median house (5 yr)
$1.83m
Median unit (5 yr)
$850k
Sales (5 yr)
758
Sales (12 mths)
93
Recorded transactions, NSW Valuer General Property Sales Information (CC BY 4.0). Recent weeks may not be registered yet.
Community safety
327 recorded incidents in 2025 · down 9.4% vs 2024
School catchments (suburb centre)
Primary
Thornleigh WPS
Secondary
Pennant Hls HS
Zones at the suburb's address centroid — individual addresses can differ; check any address on PropertyCheck for its exact zones. Source: state education departments (CC BY).
Growth & supply · Normanhurst - Thornleigh - Westleigh
District population (2025)
19,875
+4% over 10 years
New homes approved (12 mths to May 2026)
35
houses 35 · other 0
ABS statistical district (SA2) containing the suburb centre (CC BY 4.0).
Sold prices by street
Every recorded transaction, free — the most-traded streets in Thornleigh:
- Pennant Hills Road (302)
- Duffy Avenue (274)
- Sefton Road (242)
- Dartford Road (188)
- Thornleigh Street (168)
- Bellevue Street (150)
- Norman Avenue (133)
- The Esplanade (115)
- Kooringal Avenue (114)
- Loch Maree Avenue (105)
- Paling Street (100)
- Wareemba Avenue (95)
Check any address in Thornleigh
Free value estimate with the comparable evidence behind it — no paywall, no sign-up.
All figures from official open data with attribution; estimates and medians are statistical outputs, not valuations. Suburb boundaries follow ABS Suburbs and Localities (SAL) 2021.