Bolton West is a constituency[n 1] represented in the House of Commons of the UK Parliament since 2024 by Phil Brickell, a Labour Party politician.

1950–1983: The County Borough of Bolton wards of Deane-cum-Lostock, Derby, Halliwell, Heaton, Rumworth, Smithills, and West.

1983–1997: The Borough of Bolton wards of Blackrod, Deane-cum-Heaton, Halliwell, Horwich, Hulton Park, Smithills, and Westhoughton.

1997–2010: The Borough of Bolton wards of Blackrod, Deane-cum-Heaton, Horwich, Hulton Park, Smithills, and Westhoughton.

Following a local government boundary review which came into effect in May 2023,[4][5] the constituency now comprises the following wards of the Metropolitan Borough of Bolton from the 2024 general election: