This is a list of

prime ministers of the United Kingdom The prime minister of the United Kingdom is the principal minister of the crown of His Majesty's Government, and the head of the British Cabinet. There is no specific date for when the office of prime minister first appeared, as the role was no ...

by length of tenure. This is based on the difference between dates; if counted by number of calendar days, figures would be one day greater for each term served. The term "Prime Minister" appeared in the early eighteenth century, as an unofficial title for the leader of the government, usually the head of the Treasury. Jonathan Swift, for example, wrote that in 1713 there had been "those who are now commonly called Prime Minister among us", referring to

Sidney Godolphin Sidney Godolphin is the name of: * Sidney Godolphin (colonel) (1652–1732), Member of Parliament for fifty years * Sidney Godolphin (poet) (1610–1643), English poet * Sidney Godolphin, 1st Earl of Godolphin (c. 1640–1712), leading British poli ...

and Robert Harley, Queen Anne's Lord Treasurers and chief ministers.

Robert Walpole Robert Walpole, 1st Earl of Orford, (26 August 1676 – 18 March 1745; known between 1725 and 1742 as Sir Robert Walpole) was a British statesman and Whig politician who, as First Lord of the Treasury, Chancellor of the Exchequer, and Leader ...

is regarded as the first prime minister; he became

First Lord of the Treasury The first lord of the Treasury is the head of the Lords Commissioners of the Treasury exercising the ancient office of Lord High Treasurer in the United Kingdom, and is by convention also the prime minister. This office is not equivalent to the ...

Great Britain Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is ...

in 1721. This list includes all Prime Ministers of the

Kingdom of Great Britain The Kingdom of Great Britain (officially Great Britain) was a Sovereign state, sovereign country in Western Europe from 1 May 1707 to the end of 31 December 1800. The state was created by the 1706 Treaty of Union and ratified by the Acts of ...

United Kingdom of Great Britain and Ireland The United Kingdom of Great Britain and Ireland was a sovereign state in the British Isles that existed between 1801 and 1922, when it included all of Ireland. It was established by the Acts of Union 1800, which merged the Kingdom of Great B ...

and the modern-day

United Kingdom of Great Britain and Northern Ireland The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...

Notable lengths

Of the 56 past prime ministers, nine served more than 10 years while eight served less than a year.

is the only person to have served as prime minister for more than two decades.

Liz Truss Mary Elizabeth Truss (born 26 July 1975) is a British politician who briefly served as Prime Minister of the United Kingdom and Leader of the Conservative Party from September to October 2022. On her fiftieth day in office, she stepped down ...

is the shortest-serving former prime minister, resigning after seven weeks. The previous shortest time served was

George Canning George Canning (11 April 17708 August 1827) was a British Tory statesman. He held various senior cabinet positions under numerous prime ministers, including two important terms as Foreign Secretary, finally becoming Prime Minister of the Unit ...

, who served for less than four months before dying in office.

Margaret Thatcher Margaret Hilda Thatcher, Baroness Thatcher (; 13 October 19258 April 2013) was Prime Minister of the United Kingdom from 1979 to 1990 and Leader of the Conservative Party (UK), Leader of the Conservative Party from 1975 to 1990. S ...

is the longest serving prime minister in modern history serving for over 11 years.

List of office holders by tenure

;Note: In this table, "Terms" is the number of separate, discontiguous periods served as prime minister.

Disputed

References

{{List of UK Prime Ministers

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...

Time in office

Notable lengths

List of office holders by tenure

Disputed

See also

References