The Metropolitan Borough of Wigan is a metropolitan borough of Greater Manchester, in North West England. It is named after the main settlement of Wigan but covers a far larger area, extending up to 9 miles eastwards, including the towns of Atherton, Ashton-in-Makerfield, Golborne, Hindley, Ince-in-Makerfield, Leigh and Tyldesley. The borough also covers the villages and suburbs of Abram, Aspull, Astley, Bryn, Hindley Green, Lowton, Mosley Common, Orrell, Pemberton, Shevington, Standish, Winstanley and Worsley Mesnes. The borough is also the second-most populous district in Greater Manchester.

The borough was formed in 1974, replacing several former local government districts. It is the furthest west part of Greater Manchester, and it is bordered by the Greater Manchester boroughs of City of Salford and Bolton to the east, the Cheshire borough of Warrington to the south, the Merseyside borough of St Helens to the south west, and the Lancashire boroughs of West Lancashire to the west and Chorley to the north.