Mirfield is a town and civil parish in the Metropolitan Borough of Kirklees, West Yorkshire, England. Historically part of the West Riding of Yorkshire, it is on the A644 road between Brighouse and Dewsbury. At the 2011 census it had a population of 19,563. Mirfield forms part of the Heavy Woollen District.

Kirklees is a metropolitan borough of West Yorkshire, England. The borough comprises the ten towns of Batley, Birstall, Cleckheaton, Dewsbury, Heckmondwike, Holmfirth, Huddersfield, Meltham, Mirfield and Slaithwaite. It is governed by Kirklees Council. Kirklees had a population of 422,500 in 2011; it is the third-largest metropolitan district in England by area, behind Doncaster and Leeds.