Thornleigh, a suburb of Sydney in New South Wales is beautifully located 22 kilometers north-west of the Sydney central business district . Though it stretches in length and breadth up to 4 km2 yet it is well connected with various mode of transportation. The population of Thornleigh is approximately 8,464 people. Best places to be in Thornleigh are Headen Park, Brickpit Playground and Thornleigh Dog Park . Some suburb around Thornleigh are Westleigh, Hornsby, Normanhurst Wahroonga, Pennant Hills and Turramurra.