Colne Valley is a constituency[n 1] represented in the House of Commons of the UK Parliament since 2024 by Paul Davies of the Labour Party.

A sizeable proportion of retirees live in the area, celebrated in the decades-long television comedy Last of the Summer Wine, centred on Holmfirth in the seat.

The wider Colne and Holme Valleys still retain some agriculture such as the Longley Farm dairy whose products are sold nationwide.

Since the 1964 general election, the only occasion when the winning candidate's majority exceeded 10% of the votes cast was in 1992, and three different parties have held the seat during this period.

However, former MP Jason McCartney took the seat back for the Conservatives in 2019, only to lose it again to Labour's Paul Davies at the 2024 general election.

1918–1950: The Urban Districts of Farnley Tyas, Golcar, Holme, Holmfirth, Honley, Linthwaite, Marsden, Meltham, New Mill, Saddleworth, Scammonden, Slaithwaite, South Crosland, Springhead, and Thurstonland.