Ashton-under-Lyne is a constituency^{[n 1]} in the House of Commons of the UK Parliament. It has been represented since 2015 by Angela Rayner, who has served as Deputy Leader of the Labour Party since 2020.^{[n 2]}

Like much of Greater Manchester, Ashton was a significant hub for textile production and retains some manufacturing.^[3] Incomes and house prices are lower than UK averages.^[4]

1832–1885: The area defined by the Ashton-under-Lyne Improvement Act 1827 (7 & 8 Geo. 4. c. lxxvii).^[5]

1885–1918: The existing parliamentary borough, and so much of the parish of Ashton-under-Lyne included in the local government district of Hurst as was not already included in the parliamentary borough.^[6]

1918–1949: The Municipal Borough of Ashton-under-Lyne, and the Urban District of Hurst.

1950–1955: The Municipal Boroughs of Ashton-under-Lyne, and Mossley; and the Rural District of Limehurst.

1955–1983: The Municipal Boroughs of Ashton-under-Lyne, and Mossley; and the Rural District of Droylsden.^[7]

The constituency currently covers the Failsworth East and Failsworth West wards in the Metropolitan Borough of Oldham and the Ashton Hurst, Ashton St. Michael's, Ashton Waterloo, Droylsden East, Droylsden West and St. Peters wards of the Metropolitan Borough of Tameside.

In the 1886 election, voting resulted in a tie between incumbent John Edmund Wentworth Addison and the Liberal candidate. Under the legislation of the time, the presiding officer had a casting vote, and Addison was reelected. In the by-election of 29 October 1928, the turnout was 89.1%, a record for Great Britain. The mayor arranged for the result to be signalled by coloured rockets.^[20]

• List of parliamentary constituencies in Greater Manchester
• 1920 Ashton-under-Lyne by-election
• 1928 Ashton-under-Lyne by-election
• 1931 Ashton-under-Lyne by-election
• 1939 Ashton-under-Lyne by-election
• 1945 Ashton-under-Lyne by-election