Thornhill is a village in West Yorkshire, England.
It is situated within the WF12 postcode district, which is within the Dewsbury post town.
The full list of postcode districts within the Dewsbury post town is as follows:
The Dewsbury post town is within the Wakefield postcode area.
Administrative Ward: Dewsbury South
Administrative District: Kirklees
Country: England
UK Parliament: Dewsbury
NHS Local Health Authority: Yorkshire and the Humber
NHS Region: North, Midlands and the East