List of Prime Ministers of the United Kingdom by tenure

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20 years, 314 days
Robert Walpole
from 1721 to 1742
18 years, 343 days
William Pitt the Younger from
1783 to 1801 and 1804 to 1806
14 years, 305 days
Earl of Liverpool
from 1812 to 1827
211 days
Bonar Law
from 1922 to 1923
130 days
Viscount Goderich
from 1827 to 1828
119 days
George Canning
in 1827

This list of Prime Ministers of the United Kingdom lists each Prime Minister in order of term length. This is based on the difference between dates; if counted by number of calendar days all the figures would be one greater.

Of the 54 Prime Ministers, 9 served more than 10 years while 7 served less than 1 year.

Sir Robert Walpole is the only person to have served as Prime Minister for more than 20 years. George Canning served as Prime Minister for less than four months before his death.

Rank by tenure[edit]

Rank by
length
of terms
Prime Minister Length by
time served
Ministries Party Start of 1st
Administration
1 Sir Robert Walpole 20 years, 314 days 1 Whig 1721
2 William Pitt the Younger 18 years, 343 days 2 Pittite (Tory) 1783
3 The Earl of Liverpool 14 years, 305 days 1 Tory 1812
4 The Marquess of Salisbury 13 years, 252 days 3 Conservative 1885
5 William Ewart Gladstone 12 years, 126 days 4 Liberal 1868
6 Lord North 12 years, 58 days 1 Tory 1770
7 Margaret Thatcher 11 years, 209 days 1 Conservative 1979
8 Henry Pelham 10 years, 191 days 1 Whig 1743
9 Tony Blair 10 years, 56 days 1 Labour 1997
10 The Viscount Palmerston 9 years, 141 days 2 Whig 1855
11 H. H. Asquith 8 years, 244 days 1 Liberal 1908
12 Sir Winston Churchill 8 years, 239 days 2 Conservative 1940
13 Harold Wilson 7 years, 279 days 2 Labour 1964
14 The Duke of Newcastle 7 years, 205 days 2 Whig 1754
15 Stanley Baldwin 7 years, 82 days 3 Conservative 1923
16 Benjamin Disraeli 6 years, 339 days 2 Conservative 1868
17 Ramsay MacDonald 6 years, 289 days 3 Labour/National Labour 1924
18 Harold Macmillan 6 years, 281 days 1 Conservative 1957
19 The Viscount Melbourne 6 years, 255 days 2 Whig 1834
20 John Major 6 years, 154 days 1 Conservative 1990
21 Clement Attlee 6 years, 92 days 1 Labour 1945
22 David Cameron 6 years, 63 days 2 Conservative 2010
23 Lord John Russell 6 years, 11 days 2 Whig 1864
24 David Lloyd George 5 years, 317 days 1 Liberal 1916
25 Sir Robert Peel 5 years, 57 days 2 Conservative 1834
26 The Earl of Derby 3 years, 280 days 3 Conservative 1852
27 Edward Heath 3 years, 259 days 1 Conservative 1970
28 The Earl Grey 3 years, 229 days 1 Whig 1830
29 Arthur Balfour 3 years, 145 days 1 Conservative 1902
30 The Duke of Portland 3 years, 82 days 2 Whig/Tory 1783
31 Henry Addington 3 years, 54 days 1 Tory 1801
32 James Callaghan 3 years, 29 days 1 Labour 1976
33 Neville Chamberlain 2 years, 348 days 1 Conservative 1937
34 The Duke of Wellington 2 years, 320 days 2 Tory 1828
35 Gordon Brown 2 years, 319 days 1 Labour 2007
36 Spencer Perceval 2 years, 221 days 1 Tory 1809
37 Henry Campbell-Bannerman 2 years, 122 days 1 Liberal 1905
38 George Grenville 2 years, 85 days 1 Whig (Grenvillite) 1763
39 The Earl of Chatham 2 years, 76 days 1 Whig (Chathamite) 1766
40 The Earl of Aberdeen 2 years, 42 days 1 Peelite 1852
41 Sir Anthony Eden 1 year, 279 days 1 Conservative 1955
42 The Earl of Wilmington 1 year, 136 days 1 Whig 1742
43 The Marquess of Rockingham 1 year, 113 days 2 Whig (Rockinghamite) 1765
44 The Earl of Rosebery 1 year, 109 days 1 Liberal 1894
45 The Duke of Grafton 1 year, 106 days 1 Whig (Chathamite) 1768
46 The Lord Grenville 1 year, 42 days 1 Whig 1806
47 Sir Alec Douglas-Home 362 days 1 Conservative 1963
48 Theresa May 345 days (Incumbent) 1 Conservative 2016
49 The Earl of Bute 317 days 1 Tory 1762
50 The Earl of Shelburne 266 days 1 Whig (Chathamite) 1782
51 The Duke of Devonshire 225 days 1 Whig 1756
52 Bonar Law 211 days 1 Conservative 1922
53 The Viscount Goderich 130 days 1 Tory (Canningite) 1827
54 George Canning 119 days 1 Tory (Canningite) 1827

See also[edit]

External links[edit]