Welsh Labour (Welsh: Llafur Cymru) is the part of the United Kingdom Labour Party that operates in Wales. Labour is the largest and most successful political party in modern Welsh politics, having won (with its predecessor organisations) the largest share of the vote at every UK General Election since 1922, every Welsh Assembly election since 1999, and each European Parliament election from 1979 until 2009.

The Labour Party in Wales has 1 of 4 Welsh seats in the European Parliament, 29 of 40 Welsh seats in the UK Parliament, 30 of 60 seats in the National Assembly for Wales, and 576 of 1,264 principal local authority councillors, including overall control of 10 of 22 Welsh local authorities.

Welsh Labour is formally part of the Labour Party. It is neither separately registered with the Electoral Commission under the terms of the Political Parties, Elections and Referendums Act, nor is it part of a federal organisation (such as the relationship between the Welsh Liberal Democrats and the Liberal Democrats, for example). As such it does not have an office of Leader. Carwyn Jones is regarded as the de facto Leader, although his constitutional position is that of Leader of the National Assembly Labour Party (NALP), analogous to the Parliamentary Labour Party (PLP). As with Scottish Labour, Welsh Labour has its own General Secretary which is the administrative head of the party and is responsible for how the party is run.

Labour Party or Labor Party may refer to:

Carwyn Howell Jones (born 21 March 1967) is a Welsh politician and the First Minister of Wales. The third official to lead the Welsh Government, Jones has been Assembly Member for Bridgend since 1999. In the coalition government of Welsh Labour and Plaid Cymru, he was appointed Counsel General for Wales and Leader of the House on 19 July 2007. Along with a number of other Assembly Members, he is a fluent Welsh speaker, and is also a member of Amnesty International and the Fabian Society. He was elected to succeed Rhodri Morgan as the new Leader of Welsh Labour on 1 December 2009. On 9 December he was nominated as First Minister and unanimously elected by the National Assembly. He was sworn into office the following day.

Born in Swansea, he was raised in Bridgend in a fluent Welsh speaking family. He was a pupil at Brynteg Comprehensive School in Bridgend, and then studied at the University of Wales, Aberystwyth, where he joined the Labour Party during the Miners' Strike.

Jones trained as a barrister at the Inns of Court School of Law, London, and was called to the Bar at Gray's Inn in 1989.