List of Prime Ministers of the United Kingdom by tenure
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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 53 Prime Ministers, 9 served more than 10 years while 7 served less than 1 year.
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
| Rank by length of terms | Prime Minister | Length by time served | Administrations | 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 | Lord John Russell | 6 years, 11 days | 2 | Whig | 1864 |
| 23 | David Cameron | 5 years, 317 days (Incumbent) | 1 | Conservative | 2010 |
| 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 | The Earl of Bute | 317 days | 1 | Tory | 1762 |
| 49 | The Earl of Shelburne | 266 days | 1 | Whig (Chathamite) | 1782 |
| 50 | The Duke of Devonshire | 225 days | 1 | Whig | 1756 |
| 51 | Andrew Bonar Law | 211 days | 1 | Conservative | 1922 |
| 52 | The Viscount Goderich | 130 days | 1 | Tory (Canningite) | 1827 |
| 53 | George Canning | 119 days | 1 | Tory (Canningite) | 1827 |
See also
- List of Prime Ministers of the United Kingdom
- List of Prime Ministers of the United Kingdom by longevity
- William Pulteney, 1st Earl of Bath (sometimes listed as a prime minister; held office for 2 days in 1746)
- James Waldegrave, 2nd Earl Waldegrave (sometimes listed as a prime minister; held office for 4 days in 1757)
External links
- Prime Ministers in History from the 10 Downing Street website.
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