Halifax, urban area (1991 pop. 87,488), Calderdale metropolitan district, central England, on the Hebble, a small tributary of the Calder River. Halifax is an industrial town centered around the production of woolen goods, carpets, and machine tools. Other industries include the manufacture of cotton, silk and synthetics, and iron and steel. Noteworthy are the Bankfield Museum, the 18th-century Piece Hall, the 15th-century parish church of St. John the Baptist, the Renaissance town hall designed by Sir Charles Barry, and Heath Grammar School (1585). Halifax carried on an important wool trade in the Middle Ages.