This article documents the strengths of political parties in the 317 local authorities of England,^[1] 32 local authorities of Scotland,^[2] 22 principal councils of Wales^[3] and 11 local councils of Northern Ireland.^[4]

England's 317 local authorities are made up of: 32 London borough councils, 21 county councils and 164 district councils (two tiers of local government which share responsibility for the same physical area), 36 metropolitan district councils, 62 unitary authorities, and 2 sui generis authorities, the City of London Corporation and Council of the Isles of Scilly.^[1]

This article does not cover the Greater London Authority or the 10 combined authorities of England (and their respective mayors).^[1] It also doesn't cover the 35 police and crime commissioners or the four police, fire and crime commissioners in England and Wales.^[5] And it also doesn't include the thousands of parish/local councils of England,^[6] community councils of Scotland^[7] and community councils of Wales.^[3]

English local authorities have a choice of executive arrangements out of a mayor and cabinet executive, a leader and cabinet executive, a committee system or alternative arrangements approved by the Secretary of State.^[1] Councils in England^[1] and Northern Ireland^[8] run on four year cycles, while councils in Scotland^[9] and, from 2022, in Wales^[10] run on five year cycles. An English local authority's councillors may be elected all at once, by halves or by thirds.^[1] Because of this disparate system, various local elections take place every year, but changes in party representation arise frequently regardless due to resignations, deaths, by-elections, co-options and changes of affiliation.

Last full update: 22 June 2022

Last full update: 22 June 2022

Last full update: 14 May 2023

Last full update: 22 June 2022

All 32 Scottish Councils had all their seats up for election by Single Transferable Vote in May 2022. Elections are on a five-year cycle and are next due in May 2027. Only two mainland councils are controlled by majority administrations: Dundee and West Dumbartonshire, who are controlled by Scottish Labour and the Scottish National Party, respectively. The three island councils (Orkney, Shetland and the Western Isles) are each controlled by local independents.

Political control may be held by minority governments (min), coalitions (co), joint leadership arrangements (j.l.) or partnership working arrangements (p.w.).^[21]

Last update 6 May 2022.^[22][23]

All 22 Welsh unitary authorities had all of their seats up for election in May 2022, and the next elections are expected in May 2027.

Last update 9 June 2022.

Elections were most recently held for 11 councils in Northern Ireland in May 2023. They are held every four years, with the next elections due in May 2027. All seats are filled at once by Single Transferable vote within district electoral areas of 5 to 7 wards.

The councils have ceremonial mayors elected by council members. Uniquely in the UK, vacancies are filled by co-option by whichever party won the seat at the previous election.

Last update 3 October 2023.^[31]