Horwich is a town and civil parish in the Metropolitan Borough of Bolton, Greater Manchester, England, within the historic county boundaries of Lancashire. It is 5.3 miles (8.5 km) southeast of Chorley, 5.8 miles (9.3 km) northwest of Bolton and 15 miles (24 km) northwest of Manchester. It lies at the southern edge of the West Pennine Moors with the M61 motorway passing close to the south and west. At the 2011 Census, Horwich had a population of 20,067.

The Metropolitan Borough of Bolton is a metropolitan borough in Greater Manchester, England, named after its largest town, Bolton, but covering a larger area which includes Blackrod, Farnworth, Horwich, Kearsley, Westhoughton, and part of the West Pennine Moors. It had a population of 298,903 in 2022, making it the third-most populous district in Greater Manchester.