Cannock was a parliamentary constituency in Staffordshire which returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom from 1918 until it was abolished for the 1983 general election.
It was effectively recreated in 1997 as the seat of Cannock Chase.
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.
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.