About the profile areas
The 2016 Estimated Resident Population for Thornleigh is 8,811, with a population density of 22.77 persons per hectare.
Location and boundaries
Thornleigh is bounded by Waitara Creek in the north, the suburb of Normanhurst and the Lane Cove River in the east, the suburb of Pennant Hills in the south and Quarter Sessions Road, Duffy Avenue and the suburb of Westleigh in the west.
Thornleigh is named after Chief Constable John Thorn, an early land holder.
2016 ABS ERP
hectares (4 Km2)
persons per hectare
Settlement of the area dates from 1838 when the first land grant was made. Growth was minimal until the 1880s, following the opening of the railway line. Significant development occurred in the post-war period. The population has increased gradually since the mid 1990s, a result of new dwellings being added to the area.
Thornleigh is an established residential area, with substantial industrial land use in the central section, based around Chilvers Road, Sefton Road and Duffy Avenue.
Major features of the area include Brickpit Sports Stadium, Thornleigh Marketplace, Marjorie Headen Lookout, Dawson Park, Headen Park, Janet Park, Larool Park, Norman Avenue Park, Oakleigh Park, Pennant Hills Park, Rannoch Park, Wanawong Drive Park, Yaralla Park, Action Indoor Sports Centre Thornleigh and two schools.