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POLITICS

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United Kingdom

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Longest Tenured Prime Ministers

This list features the British Prime Ministers with the longest tenures in history.

RANK

PRIME MINISTER

TENURE

YEARS IN OFFICE

PARTY

1

Sir Robert Walpole

1721-1742

20 years, 314 days

Whig

2

William Pitt the Younger

1783-1801

18 years, 343 days

Tory (Pittite)

3

The Earl of Liverpool

1812-1827

14 years, 305 days

Tory (Pittite)

4

The Marquess of Salisbury

1895-1902

13 years, 252 days

Conservative

5

William Ewart Gladstone

1868-1874 1880-1885

12 years, 126 days

Liberal

6

Lord North

1766-1782

12 years, 58 days

Tory (Northite)

7

Margaret Thatcher

1979-1990

11 years, 208 days

Conservative

8

Henry Pelham

1743-1754

10 years, 191 days

Whig

9

The Viscount Palmerston

1855-1865

9 years, 141 days

Whig / Liberal

10

H. H. Asquith

1908-1916

8 years, 244 days

Liberal

11

Sir Winston Churchill

1940-1945

8 years, 239 days

Conservative


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References

UKPSS2 Fandom. (n.d.). List of prime ministers of the United Kingdom by length of tenure. Available at: https://ukpss2.fandom.com/wiki/List_of_prime_ministers_of_the_United_Kingdom_by_length_of_tenure [Accessed 1 December 2025].
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