The Trades Union Congress (TUC) is a national trade union centre, a federation of trade unions that collectively represent most unionised workers in England and Wales. There are 48 affiliated unions with a total of about 5.5 million members. Paul Nowak is the TUC's current General Secretary, serving from January 2023.

The TUC's decision-making body is the Annual Congress, which takes place in September. Between congresses decisions are made by the General Council, which meets every two months. An Executive Committee is elected by the Council from its members.^{[citation needed]}

Affiliated unions can send delegates to Congress with the number of delegates they can send proportionate to their size. Each year Congress elects a President of the Trades Union Congress, who carries out the office for the remainder of the year and then presides over the following year's conference.

The TUC is not affiliated with the Labour Party. At election time the TUC cannot endorse a particular party by name. However it can point to policies that it believes would be positive for workers' rights, or to social cohesion and community welfare. It can also politically campaign against policies that it believes would be injurious to workers.

The TUC also runs the Tolpuddle Martyrs Museum and annual Tolpuddle Martyrs' Festival and Rally commemorating the Tolpuddle Martyrs and their impact on trade unionism.

The TUC Library preserves documents related to labour history in Britain and other countries, especially Europe and the Commonwealth. It was established in 1922 and now focuses on expanding the online and digital collections.

The TUC archives are held at the Modern Records Centre at the University of Warwick Library. The archive contains files from about 1920 up to 2000 consisting of correspondence, internal and external documents, minutes, reports, printed material and press statements.

The TUC campaigns on a wide range of issues relating to the experience of people at work.