John Mann, Baron Mann is a British independent politician who is a Member of the House of Lords. Before being granted a peerage, he was the Labour Party Member of Parliament (MP) for Bassetlaw from the 2001 general election until 2019.

Bassetlaw is a parliamentary constituency in Nottinghamshire, represented in the House of Commons of the UK Parliament since the 2019 general election by Brendan Clarke-Smith, a Conservative. Before that election, the seat had been part of the so-called "red wall", being held by the Labour Party since 1935.