Welsh Labour

Welsh Labour (Welsh: Llafur Cymru), formerly known as the Labour Party in Wales (Welsh: Y Blaid Lafur yng Nghymru), is an autonomous section of the United KingdomLabour Party in Wales. Welsh Labour and its forebears won a plurality of the Welsh vote at every United Kingdom general election from 1922, every National Assembly (now Senedd) election from 1999 to 2021, and all elections to the European Parliament in the period 1979–2004 and in 2014. Welsh Labour holds 27 of the 32 Welsh seats in the House of Commons of the United Kingdom, 9 of the 96 seats in the Welsh Senedd, and 576 of the 1,264 councillors in principal local authorities including overall control of 10 of the 22 principal local authorities.

From 1922 to 2026, it had the longest winning streak of any political party in the world and had been described as "by some distance the democratic world's most successful election-winning machine". Its winning-streak ended in 2026, with the party receiving 9 out of 96 seats in the 7th Senedd.