a former (until 1975) county in Great Britain, in England. Situated chiefly on a plain between the coast of the Irish Sea and the foothills of the Pennines, in the basin of the Mersey, Ribble, and Wyre rivers. Area, 4,800 sq km. Population, 5.1 million (1971). Administrative center, Preston.
There are two conurbations in the south—Greater Manchester (centering on Manchester) and Merseyside (centering on Liverpool). This part of the former county is Great Britain’s oldest industrial region, which became famous in the 18th and 19th centuries for its cotton manufacture. The industrial structure of Lancashire has changed considerably. Textile production is still important, but the coal, metallurgy, machine-building, chemical, and food-processing industries have also developed. The machine-tool, automobile, electrical-engineering, and electronics industries are particularly important, as are new chemical enterprises producing chemical and synthetic fibers. The new counties of Lancashire, Greater Manchester, and Merseyside have been formed from the former county of Lancashire. [14–427–7; updated]