Thornleigh NSW

Postcode 2120 · Hornsby LGA

Thornleigh is a mid-sized suburb in New South Wales within the Hornsby local government area (postcode 2120). With a population of 8,898, the suburb has an established demographic with a median age of 40. Households earn a median income of $139K per year, with an average household size of 2.9 people. The most common occupations are professionals, managers, clerical & administrative. The top ancestries reported are English, Australian, Chinese.

The median house price in Thornleigh is $1.6 million, having dropped significantly 14% over the past year. Units have a median price of $150,000 (-84.7% YoY). The current median weekly rent is $850. This gives a gross rental yield of approximately 2.8%. The median monthly mortgage repayment is $2,800.

Thornleigh is served by 2 schools, including 2 primary. The average ICSEA score is 1139, which is well above the national average of 1,000. Public transport access includes 3 rail stations, 79 bus stops. The crime rate in the Hornsby LGA is low at 1,223 incidents per 100,000 population.

From an investment perspective, Thornleigh offers a gross rental yield of 2.8%, rated as low yield. Property prices are near the state median ($1.6M/$1.5M). The price-to-income ratio of 11.5x is considered stretched. House prices have moved -14.0% year-on-year.

INVESTMENT SIGNALS
Rental Yield2.8% Low Yield
Price vs State$1.6M/$1.5M Near Median
Affordability11.5x Stretched
Price Momentum-14.0% Falling
SEIFA INDEX (ABS)
Advantage10/10
Education10/10
Economic9/10
Disadvantage10/10
MEDIAN HOUSE
$1.6M
-14% YoY
MEDIAN UNIT
$150K
-84.7% YoY
MEDIAN RENT /WK
$530
POPULATION
8,898
DEMOGRAPHICS
Median Age40
Household Size2.9
HH Income /wk$2,681
Personal Income /wk$1025
Mortgage /mth$2,800
CRIME (Hornsby LGA)
Crime Rate (per 100k)1,223
Total Incidents1,894
TRANSPORT
Rail Stations3
Bus Stops79
Pennant Hills Rd At Railway Pde
Pennant Hills Rd At Station St
Thornleigh Station, Bellevue St
SCHOOLS (2)
Avg ICSEA1139
Total Students840
Government2
Thornleigh West Public SchoolPrimary · Government · ICSEA 1142
Normanhurst West Public SchoolPrimary · Government · ICSEA 1136
Data: 2026