Thornleigh, NSW 2120 — Suburb Profile
Last reviewed: · By Knowburb Research Team
In short
Thornleigh is a suburb of New South Wales, postcode 2120, home to 8,898 residents with an established residential profile. Located in the Hornsby local government area and roughly 20 km from the Sydney CBD.
Snapshot
Demographics
- Population
- 8,898
- Median age
- 40 years
- Median household income
- $2,681 /week
- Median personal income
- $1,025 /week
- Median family income
- $3,016 /week
- Average household size
- 2.9
- Persons per bedroom
- 0.9
- Local government area
- Hornsby
- Statistical region (SA4)
- Sydney - North Sydney and Hornsby
- Remoteness classification
- Major Cities of Australia
- Federal electorate
- Berowra
Property & cost of living
- Median rent
- $530 /week
- Median monthly mortgage
- $2,800
- Rent share of household income
- 20%
Schools
- Pennant Hills Public School
- Thornleigh West Public School
- Pennant Hills High School
- Normanhurst West Public School
- Normanhurst Public School
Transport
- Within 800 m walk: 5 train stops, 31 bus stops
- Within 1.6 km: 5 train stops, 104 bus stops
- Stevens St At Westwood St
- The Esplanade Opp Thornleigh Station
- Thornleigh Station, The Esplanade
- Thornleigh Station, Platform 3
- Thornleigh Station, Platform 2
Lifestyle & amenities
- 4 cafés
- 8 restaurants
- 2 pubs and bars
- 40 parks and reserves
- 2 gyms and fitness centres
- 1 library
- 5 supermarkets
- 17 playgrounds
Climate
- Warmest month: Jan (26.0°C avg max)
- Coolest month: Jul (16.4°C avg max)
- Annual rainfall: 1211 mm
- Reference station: Sydney (Observatory Hill), 19.1 km away
NBN & connectivity
Hybrid Fibre-Coaxial serves 90.9% of the 3,958 resolvable premises in Thornleigh. Most premises here use the existing pay-TV coaxial cable, upgraded for NBN. Plans up to NBN 1000 are typically available.
- Fibre to the Premises: 8.0%
- Fibre to the Building: 1.1%
- Hybrid Fibre-Coaxial: 90.9%
Safety
- Recorded offences: 423 across postcode 2120 in the year to Dec 2025 (down 14% on the prior year).
- Most common categories: 166 theft, 87 violent offences, 54 property damage.
Frequently asked questions
What is the population of Thornleigh?
Thornleigh (NSW 2120) had 8,898 residents at the most recent ABS Census. The median age is 40. It sits within the Hornsby local government area.
What is the median rent in Thornleigh?
The median advertised rent in Thornleigh is $530/week, based on SQM Research listings data. Rents vary by property type, bedrooms and condition.
Are there schools in Thornleigh?
Yes — 5 schools are listed within or near Thornleigh covering government sectors. Nearest include: Pennant Hills Public School (0.7 km), Thornleigh West Public School (0.8 km), Pennant Hills High School (1.2 km). School data sourced from ACARA and state education departments.
What NBN technology is available in Thornleigh?
Thornleigh is predominantly served by Hybrid Fibre Coaxial (90.9% of premises). Coverage data is sourced from the NBN upgrade map aggregated from NBN Co address checks.
How safe is Thornleigh?
Across postcode 2120, 423 offences were recorded in the 12 months to Dec 2025. The most common offence categories were theft (166), violent (87), property damage (54). Crime statistics are recorded by area (postcode or LGA), not by individual suburb. Data sourced from each state's crime statistics agency.
What is the climate like in Thornleigh?
In Thornleigh, mean daily temperatures range from 13.8°C to 21.8°C and annual rainfall is 1,211 mm measured at the Sydney (Observatory Hill) weather station (19.1 km away). Long-term averages from the Bureau of Meteorology.
What public transport options are in Thornleigh?
109 public transport stops are mapped within 1.6 km of the Thornleigh centroid. Within 800 m, you'll find 31 bus stops, 5 train stops. Stop data is sourced from state government GTFS feeds.
Sources & methodology
Demographics from ABS Census. Property data from SQM Research. Climate from Bureau of Meteorology. Schools from ACARA. NBN from NBN Co. Amenities from OpenStreetMap. See full methodology.
Additional sources for this profile: