This is a list of rulers and office-holders of the United Kingdom of Great Britain and Northern Ireland and predecessor states.

Heads of state

• List of English monarchs
• List of Scottish monarchs
• List of rulers of Wales
• List of British monarchs

Heads of government

• Prime Minister of the United Kingdom (1721–present)
  • List of prime ministers of the United Kingdom

Ministers

• Cabinet of the United Kingdom
• Chancellor of the Exchequer (1559–present)
• Secretary of State for Northern Ireland (1972–present)
• Secretary of State for Foreign and Commonwealth Affairs (1968–present)
• Secretary of State for the Colonies (1768–1782; 1794–1801; 1854–1966)
• Secretary of State for India (1858–1947)
• Secretary of State for the Southern Department (1660–1782)
• Secretary of State for the Northern Department (1660–1782)
• Secretary of State for the Home Department (1782–present)
• Secretary of State for Foreign Affairs (1782–1968)
• Secretary of State for War (1794–1801; 1854–1964)
• Secretary of State for War and the Colonies (1801–1854)
• Secretary of State for Air (1918–1964)
• Secretary of State for Defence (1964–present)
• Secretary of State for Dominion Affairs (1925–1947)
• Secretary of State for Commonwealth Relations (1947–1966)
• Secretary of State for Commonwealth Affairs (1966–1968)
• Secretary of State for Scotland (1926–present)
• Secretary of State for Wales (1964–present)
• Secretary of State for Economic Affairs (1964–1969)
• Secretary of State for International Development (1970–1979, 1997–2020)
• Secretary of State for Work and Pensions (1970–present)
• Secretary of State for Education and Skills (and preceding positions, 1902–present)
• Secretary of State for Employment (and preceding positions, 1916–present)
• Secretary of State for Transport (and preceding positions, 1924–present)
• Secretary of State for Culture, Media and Sport (and preceding positions, 1992–present)
• Secretary of State for Northern Ireland (1972–present)
• Secretary of State for the Environment (1970–1997)
• Secretary of State for the Environment, Transport and the Regions (1997–2001)
• Secretary of State for Environment, Food and Rural Affairs (2001–present)
• Secretary of State for Exiting the European Union (2016–2020)
• Lord Chancellor (1068–present)
• Lord President of the Council (1678–present)
• Lord Keeper of the Privy Seal (1307–present)
• Minister of Agriculture, Fisheries and Food (and preceding positions, 1889–2001)
• Minister of Technology (1964–1970)
• First Lord of the Admiralty (1709–1964) See also Admiralty.
• Paymaster General (1834–present)
• Master-General of the Ordnance (1544–1855)
• President of the Board of Trade (1696–1782; 1784–present)
• Chancellor of the Duchy of Lancaster (1413–present)
• Postmaster General (1823–1968)
• Paymaster of the Forces (1661–1836)
• Master-General of the Ordnance (1544–1855)
• Master of the Mint (1572–1869)
• Treasurer of the Navy (1544–1836)
• Secretary at War (1661–1863)
• First Commissioner of Woods and Forests (1810–1851)
• First Commissioner of Works (1851–1937)
• President of the Poor Law Board (1834–1871)
• President of the Local Government Board (1871–1919)
• Secretary for Scotland (1885–1926)
• HM Treasury
• Lord Treasurers (1126–1714)
• First Lord of the Treasury (1714–1905)
• Commissioners of the Treasury (1714–present)

Parliament office-holders

• Leader of the House of Commons (1721–present)
• Members of Parliament elected in 2001
• Members of Parliament elected in 2005
• Members of Parliament elected in 2010
• Members of the House of Lords

State office-holders

Great Officers of State

• Lord High Steward
• Lord High Constable
• Lord Great Chamberlain
• Earl Marshal
• Keeper of the Great Seal of Scotland
• Keeper of the Privy Seal of Scotland
• Lord Clerk Register
• Lord Lyon King of Arms

Officers of the Royal Household

• Lord Steward
• Lord Chamberlain
• Historiographer Royal
• Astronomer Royal for Scotland
• Sculptor in Ordinary for Scotland
• HM Painter and Limner for Scotland
• Her Majesty's Botanist

Legal Officers

• Attorney General for England and Wales
• Solicitor General for England and Wales
• Lord Advocate
• Solicitor General for Scotland
• Advocate General for Scotland
• Counsel General for Wales
• Attorney General for Northern Ireland

Court office-holders

• Lord Chief Justice
• Master of the Rolls
• Chief Justice of the Court of Common Pleas (to 1873)
• Chief Baron of the Exchequer (to 1873)
• Lord Justice General
• Lord Justice Clerk
• Lords Justice of Appeal of England and Wales
• Lords Justice of Appeal of Northern Ireland
• Senators of the College of Justice

Heads of devolved administrations

Northern Ireland

• Lord Lieutenant of Ireland (1171–1922)
• Governors of Northern Ireland (1922–1972) (Abolished under the Northern Ireland Constitution Act 1973)
• Prime Minister of Northern Ireland (1922–1972)
• Secretaries of State for Northern Ireland (1972– 1998, 2002–2007)
• First Minister and Deputy First Minister [1998–2002, 2007–present]
• County Court Judges of Northern Ireland
• Members of the Northern Ireland Assembly [1998–2002, 2007–present]

Scotland

• Members of the Scottish Parliament
• First Minister of Scotland
• List of Scottish Governments

Wales

• Members of the Senedd
• Welsh Government
• First Minister for Wales

Heads of colonies and overseas territories

• British Crown dependencies
• Overseas territories of the United Kingdom

Crown dependencies

Isle of Man

• King of Mann
• Lord of Mann
• Governor of the Isle of Man
• Lieutenant Governor of the Isle of Man

Channel Islands

• Guernsey: Bailiffs of Guernsey
• Jersey: Bailiffs of Jersey
• Sark: Seigneurs of Sark

Overseas territories

Anguilla

• Governors of Anguilla

Bermuda

• Governors of Bermuda

British Antarctic Territory

• Commissioners of the British Antarctic Territory

British Virgin Islands

• Colonial Heads of the British Virgin Islands
• Presidents of the British Virgin Islands
• Governors of the British Virgin Islands

Cayman Islands

• Governors of the Cayman Islands

Falkland Islands

• Governors of the Falkland Islands

Gibraltar

• Governors of Gibraltar
• Chief Ministers of Gibraltar

Montserrat

• Governors of Montserrat

Pitcairn Islands

• Rulers of the Pitcairn Islands
• Governors of Fiji
• High Commissioners from the United Kingdom to New Zealand

Saint Helena

• Governors of Saint Helena

Turks and Caicos Islands

• Governors of the Turks and Caicos Islands

Nobility

• Duke of Devonshire
• Tenants of Herm
• Duke of Norfolk
• Seigneurs of Sark
• Tenants of Brecqhou
• Rulers of Wales
• Prince of Wales
• Duke of York

Mayors

• Heads of London Government
  • List of Lord Mayors of London

Heads of former states

• Roman Governors of Britannia
• Historical Kings of the Britons
• Bretwalda (Overlord of the English kingdoms)
• Kings of East Anglia
• Kings of Essex
• Kings of Hwicce
• Kings of Kent
• Kings of Lindsey
• Kings of Mercia
• Kings of Northumbria
• Kings of Sussex
• Kings of Wessex
• Kings of Jorvik
• Earls of York
• Earls of Northumbria
• Kings of Dál Riata
• Kings of the Picts
• Lords of Galloway
• Rulers of Wales
• Kings of Gwynedd
• Kings of the Isle of Man and the Isles
• Kings of the Isle of Man