Acton was a constituency of the House of Commons of the Parliament of the United Kingdom, created for the 1918 general election.
The seat was created by the Representation of the People Act 1918 which increased the number of seats where population had expanded such as in Middlesex due to the conurbation growing around the County of London.
The seat consisted of the Acton Urban District which became a Municipal Borough in 1921.
A redistribution of Parliamentary seats, which took effect at the 1950 United Kingdom general election made no change to the boundaries; its legislation, affecting election expenses and returning officer re-classified, the seat as a borough constituency.
In the redistribution which took effect at the February 1974 general election, the seat to the west, Ealing South, was abolished and this seat absorbed most of its area to reach the electoral quota, it having been heavily underweight in electorate.