Mount Colah, NSW
Suburb profile from official open data — demographics, market signals, schools and safety.
At a glance
- Population
- 7,816
- Median age
- 40
- Household income
- $2,505/wk
- Owner-occupied
- 81%
- Renting
- 18%
- Socio-economic advantage
- Decile 10/10 in NSW
- Nearest train station
- Mount Colah Station · 0.4 km
- Nearest emergency dept
- Hornsby Ku-ring-gai Hospital · 3.7 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)
$1.65m
Median unit (5 yr)
$650k
Sales (5 yr)
606
Sales (12 mths)
74
Recorded transactions, NSW Valuer General Property Sales Information (CC BY 4.0). Recent weeks may not be registered yet.
Community safety
99 recorded incidents in 2025 · down 40.0% vs 2024
School catchments (suburb centre)
Primary
Mt Colah PS
Secondary
Hornsby 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 · Asquith - Mount Colah
District population (2025)
23,527
+26% over 10 years
New homes approved (12 mths to May 2026)
32
houses 30 · other 2
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 Mount Colah:
- Pacific Highway (323)
- Cowan Road (262)
- Werombi Road (176)
- Excelsior Road (118)
- Parklands Road (115)
- Rupert Street (101)
- Northumberland Avenue (90)
- Oxley Drive (75)
- Beryl Avenue (71)
- Willarong Road (62)
- Telopea Street (60)
- Amaroo Avenue (59)
Check any address in Mount Colah
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.