Industrial city in Derbyshire, England; population (1991) 218,800.
Products include Rolls-Royce cars and aero engines, Toyota cars, train repair workshops, chemicals, paper, textiles, plastics, and electrical, mining, and engineering equipment. There is also a sugar refining industry. The museum collections of Royal Crown Derby china, the Rolls-Royce collection of aero engines, and the Derby Playhouse are here.