Thornleigh, New South Wales
Sydney, New South Wales
Federation style home, Station Street
|Population||8,464 (2016 census)|
|• Density||2,120/km2 (5,500/sq mi)|
|Area||4 km2 (1.5 sq mi)|
|Location||22 km (14 mi) north-west of Sydney CBD|
|State electorate(s)||Hornsby, Ku-ring-gai|
|Federal Division(s)||Berowra, Bradfield|
Thornleigh is a suburb on the Upper North Shore and Northern Suburbs of Sydney in the state of New South Wales, Australia. Thornleigh is located 22 kilometres north-west of the Sydney central business district in the local government area of Hornsby Shire. The source of the Lane Cove River is located in Thornleigh.
Thornleigh is bounded to the north by Waitara Creek and south by the Lane Cove National Park. Thornleigh borders the suburbs of Normanhurst, Hornsby, Wahroonga, Westleigh and Pennant Hills. Thornleigh offers great district views and the topography varies greatly with many established areas built around bushland settings and into the hills to afford the great views. The northern areas of the suburb bounded by Larool Creek and Waitara Creek are leafy and lush with vegetation and native fauna including rainbow lorikeets, kookaburras, cockatoos, and bush turkeys. Majorie Headen Lookout is a vantage point which overlooks Larool and Waitara Creek Valley.  The area bounded near the train station and the Comenarra Parkway include early examples of Federation and Californian Bungalow style properties.
Thornleigh was originally part of the land that the Kuringai people settled. The first non indigenous people to explore the area of Thornleigh were a party led by Governor Arthur Phillip in 1788. Settlers moved into the area in the 1830s and among them were James Milson, Patrick Duffy, John Thorn and Samuel Horne. Thornleigh is named after Constable John Thorn, who, along with Constable Horne, captured bushrangers Dalton and John MacNamara, leader of the North Rocks gang, on 22 June 1830, and were granted land as a reward in 1838. Horne's land became Hornsby (now Normanhurst), and Thorn's land became Thornleigh.
Orcharding was one of the major mainstays of Thornleigh during the late nineteenth century. Land sales posters used this as an attraction for prospective settlers describing the area as "beautifully situated (and) surrounded by magnificent orchards, the fruit from which affords a splendid proof of the ferlility of the soil and mildness of the climate". Among the orchard growers was Patrick Michael Duffy, after which Duffy Avenue was named. After Patrick Duffy’s passing, his land was subdivided and passed down to his son Patrick Duffy Jnr. Eventually part of this land was purschased by the wealthy Friend family who built the Windyhaugh property on Duffy Avenue, which was later used as the first Presbyterian Fellowship Union camp in the Commonwealth.
As part of the construction of the railway from Strathfield to Hornsby, a 1.2km branch was constructed in 1884 by the contractors to a quarry in a gully west of Thornleigh. The tracks included a zig zag section.
Thornleigh railway station opened on 17 September 1886 where the local produce (mainly citrus fruits) was exported to the city markets. Fruit grown at Thornleigh was also being exported as far as Vancouver and San Francisco. 
Thornleigh Post Office opened on 12 March 1888.
The Thornleigh School of Arts opened in 1890 and was demolished in 1980 along with many other locations of historical significance in the suburb throughout the commercial development of the area in the 1970s and 1980s. These include the Astra Theatre (Originally named the Prince of Wales Theatre in 1923), the Royal Hotel, Thornleigh Public School with its World War I memorial and the original Edwardian structures at Thornleigh Railway Station. The Thornleigh Community Centre was constructed by the local and state government in order to compensate the community for the demolition of the Thornleigh School of Arts.
In 1901, the National Brickworks started operations at Thornleigh. In 1913, the largest malt works in the southern hemisphere was established by WG Chilvers. Chilvers Road was named after William George Chilvers. Other streets with notable names include Norman Avenue, named after the Australian engineer Norman Selfe.
During the Great Depression of the 1930s, unemployment was a problem in the area, so a local woman named Lorna Brandt raised money for the construction of a walking track near the Lane Cove River as a way of providing relief work. The track begins at Thornleigh Oval, at the bottom of Handley Avenue, and goes through the bush towards the Lane Cove River. It then goes parallel to the river for a short distance before looping back to arrive at Comenarra Parkway. An extension goes down to the river, through a spot called Conscript Pass. At this spot, there are rock carvings done by the men who worked on the track. One of the carvings is a caricature of Bertram Stevens, Premier of New South Wales from 1932 to 1939. The track is known as Lorna Pass in memory of Lorna Brand, and is now part of the Great North Walk, a long-distance walking trail between Sydney and Newcastle.
Plans to establish a university at Thornleigh in response to the large number of enrollments at the University of Sydney and the University of New South Wales were discussed in the early 1960s due to Thornleigh being "Central to the Northern Line and the North Shore", however, the university was eventually established in the suburb of Macquarie Park and is now known as Macquarie University. 
Thornleigh railway station is on the Northern Line of the Sydney Trains network. Pennant Hills Road is part of the National Highway, and is one of Sydney's major thoroughfares. The Esplanade from Pennant Hills is a main road accessing Thornleigh to Normanhurst. The Comenarra Parkway is an arterial road that stretches from Thornleigh through to West Pymble via Wahroonga, Turramurra and South Turramurra.
- 587 - Hornsby to Westleigh via Waitara and Normanhurst
- 588 - Hornsby to Normanhurst West via Normanhurst service
- 589 - Hornsby to Sydney Adventist Hospital via Waitara, Normanhurst, Woodlands Estate and Thornleigh.
Thornleigh contains industrial and commercial areas.
Thornleigh Marketplace containing a supermarket and speciality stores was constructed in 2005 and includes: Australia Post Office, bakeries, butchers, hair and nail salons, pharmacy, newsagency, gym, sushi bar, cafes, optometrist and Woolworths.
Shops and restaurants are located around Thornleigh railway station and nearby Pennant Hills. The household hardware chain Bunnings Warehouse have a store located next to Pennant Hills Road. American multinational fast food restaurant chain McDonald's have their Australian headquarters and flagship store in Thornleigh.
- St George Maronite Catholic Church
- Thornleigh Community Baptist Church
- Thornleigh Hillcrest Uniting Church
- Chinese Australian Baptist Church
- Thornleigh Seventh-day Adventist Church (Pennant Hills)
- Northridge Vineyard Church
- Thornleigh West Public School is a primary school (K-6, Public).
- Normanhurst West Public School (K-6, Public) at the corner of Sefton and Dartford Road.
Population and demographics
- Age distribution
- The distribution of ages in Thornleigh was very similar to the country as a whole. Thornleigh residents' median age was 39 years, compared to the national median of 38. Children aged under 15 years made up 21% of the population (national average was 19%) and people aged 65 years and over made up 14% of the population (national average was 14%).
- Ethnic diversity
- 63.5% of Thornleigh residents were born in Australia, compared to the national average of 65.5%; The next most common countries of birth were China 5.6%, England 3.8%, India 3.0%, Philippines 1.6% and New Zealand 1.5%. 68.8% of people only spoke English at home. Other languages spoken at home included Mandarin 6.1%, Cantonese 3.1%, Arabic 3.0% and Korean 1.7%. Only 21.8% of the population identified their ancestry as Australian, 23.3% English, 9.0% Chinese, 7.9% Irish and 6.1% Scottish.
- The most common responses for religion were: No Religion: 28.6%, Catholic: 24.8%, and Anglican: 14.7%.
- The median weekly household income was $2,262 per week, higher than the national average of $1,438.
- 66% of the population work in professions compared to the national average of 48.8%.
Sports and Recreation
The local sports clubs include the Thornleigh Sport and Recreation Club with baseball, basketball, cricket, netball, soccer and softball divisions. The soccer club known as Thunder FC consists of teams ranging from Under 6s through to All Age divisions playing in the Gladesville Hornsby Football Association. Home grounds are Oakleigh Oval and Ruddock Park. The Brickpit Park is used for Basketball where it is home to the Hornsby-Ku-Ring-Gai Basketball Association. It is also a popular sports venue for public and private schools in the Hornsby-Kuring-gai area. Other venues at the Brickpit Park include The Thornleigh Golf Centre, which includes driving ranges and mini-golf courses. Skateboarding and other passive recreational activities are also available at the Brickpit. Thornleigh Squash Centre has 9 glass backed courts. In addition, the elite athlete Sunny Yang resides there and can be found training there four days a week. His specialties are weight lifting, touch football, tag football and basketball. He has been known to reach a top speed of 29km/h. 
- "2016 Census QuickStats: Thornleigh". quickstats.censusdata.abs.gov.au.
- "Lookouts". www.visitsydneyaustralia.com.au.
- Joan Rowland (2008). "Thornleigh". Dictionary of Sydney. Dictionary of Sydney Trust. Retrieved 7 March 2013.
- The Book of Sydney Suburbs, Compiled by Frances Pollen, Angus & Robertson Publishers, 1990, Published in Australia ISBN 0-207-14495-8, page 255
- Oakes, John. Sydney's Forgotten Quarry Railways. pp. 65–71. ISBN 0975787039.
- Premier Postal History. "Post Office List". Archived from the original on 19 August 2008. Retrieved 1 June 2012.
- "Thornleigh History". Hornsby Shire.
- The Great North Walk, McDougall, Shearer-Heriot (Kangaroo Press) 1988, p.49
- Sydney and Blue Mountains Bushwalks, Neil Paton (Kangaroo Press) 2004, pp.19-20
- "Thornleigh History". Hornsby Shire.
- "Upper North Shore - Transdev NSW". www.transdevnsw.com.au.
- "Organisation". Head Office 21-29 Central Ave THORNLEIGH NSW 2120. McDonalds. Retrieved 1 August 2013.
- "Thornleigh Sports & Recreation Club Inc. - Thornleigh Sports and Recreation Club". www.thornleighsports.websyte.com.au.
- "Thornleigh Thunder FC". Retrieved 14 March 2013.
- "Brickpit Park". Facilities: Playground Flying fox and large climbing net Picnic tables Skate park Thornleigh Indoor Sports Stadium. Hornsby Council. Retrieved 14 March 2013.
- "Thornleigh Squash Centre". Sports Courts. Retrieved 14 March 2013.