From 1950 until 2010 Little Altcar was within the boundaries of the Crosby constituency, whose MP from 1997 until 2010 was Claire Curtis-Thomas, a member of the Labour Party, prior to her election the Crosby seat was generally considered to be a safe Conservative Party stronghold with Tory MP's elected at every election barring the 1981 Crosby by-election where Shirley Williams of the Social Democratic Party was elected to represent the constituency. As a result of boundary revisions for the 2010 general election the Crosby constituency was abolished with its northern parts, including Little Altcar, being merged with the Eastern parts of Sefton that were formerly part of the Knowsley North and Sefton East constituency, to form the new constituency of Sefton Central, which is currently represented by the Labour Party MP Bill Esterson.
