|Area:||5.2 km (2.0 sq mi)|
|Location:||6 km (4 mi) from Melbourne|
|Local Government Area:||City of Darebin|
Thornbury original pronunciation is a suburb in Melbourne, Victoria, Australia, 7 km north from Melbourne's central business district. Its Local Government Area is the City of Darebin. At the 2006 Census, Thornbury had a population of 16,716.
Thornbury is bordered by the Merri Creek to the west, and the Darebin Creek to the east. The heart of Thornbury is known as Thornbury Village, and is located at the centre of Thornbury at the intersection of High Street and Normanby Avenue/Clarendon Street. Merri Creek defines the West boundary of Thornbury and Darebin Creek defines the East boundary. Thornbury is shaped as a thin strip of land sandwiched between Northcote and Preston, its East-West width being over six times greater than its North-South width.
For 111 years Thornbury was part of the former local government area, the City of Northcote, which existed from 1883 until 1994. As such, Thornbury is universally understood to be a demographic and commercial satellite of Northcote, along with Westgarth, although the latter does not have its own postcode. Whilst both Westgarth and Thornbury each have their own distinct central hub, unlike Westgarth, the majority of Thornbury is too far away from its centre for the whole of Thornbury to ever be able to develop its own separate identity.