Dewsbury is a historic market, minster and mill town in West Yorkshire, England in the Metropolitan Borough of Kirklees.
It is to the west of Wakefield, east of Huddersfield and south of Leeds. It lies by the River Calder and an arm of the Calder and Hebble Navigation.
Historically a share of the West Riding of Yorkshire, after undergoing a times of major growth in the 19th century as a mill town, Dewsbury went through a get older of decline. More recently there has been redevelopment of derelict mills into flats.
According to the 2011 census the Dewsbury urban sub-area had a population of 62,945. Dewsbury is the largest town in the Heavy Woollen District, a conurbation of little mill towns.