Chorley is a market town in Lancashire, England, south of Preston and at the foot of the West Pennine Moors. It is the seat for the Borough of Chorley which is made up of Chorley and its surrounding villages. Chorley had a population of 33,424 as of the 2001 census, with the wider borough of Chorley having a population of 101,991.

Chorley is a local government district with borough status, in Lancashire, England. It was formed on April 1, 1974 by the merger of the existing borough of Chorley with the urban districts of Adlington and Withnell, and Chorley Rural District.

Chorley is a constituency represented in the House of Commons of the Parliament of the United Kingdom. It elects one Member of Parliament (MP) by the first past the post system of election. Since 1945 it has proved to be a marginal seat, changing hands between Labour and the Conservatives.