1918–1955: The Urban Districts of Brownhills, Cannock, and Tettenhall, the Rural District of Seisdon, in the Rural District of Cannock the parishes of Bushbury, Cheslyn Hay, Essington, Great Wyrley, and Hilton, and in the Rural District of Walsall the parish of Bentley.
1955–1974: The Urban Districts of Cannock and Wednesfield, and the Rural District of Cannock.
1974–1983: The Urban Districts of Cannock and Rugeley, and the parish of Brindley Heath in the Rural District of Lichfield.
In an analysis of the voting trends at the 1970 general election, published shortly after the event, political scientist Richard Rose claimed that Jennie Lee's defeat in Cannock was "the biggest upset" of the contest. Rose believed that a large expansion in the electorate in the constituency contributed towards the 10.7% Labour to Conservative swing, which was significantly higher than the national average.[14]
1970 notional result on 1974-1983 boundaries: Cannock