| Prime Minister | Party1 | Dates in Office |
|---|---|---|
| Sir Robert Walpole | 1721-42 | |
| Earl of Wilmington | 1742-43 | |
| Henry Pelham | 1743-54 | |
| Duke of Newcastle | 1754-56 | |
| Duke of Devonshire | 1756-57 | |
| Duke of Newcastle | 1757-62 | |
| Earl of Bute | 1762-63 | |
| George Grenville | 1763-65 | |
| Marquess of Rockingham | 1765-66 | |
| William Pitt the Elder(earl of Chatham) | 1766-68 | |
| Duke of Grafton | 1768-70 | |
| Lord North | 1770-82 | |
| Marquess of Rockingham | 1782 | |
| Earl of Shelburne | 1782-83 | |
| Duke of Portland | 1783 | |
| William Pitt the Younger | Tory | 1783-1801 |
| Henry Addington(later Viscount Sidmouth) | Tory | 1801-4 |
| William Pitt the Younger | Tory | 1804-6 |
| Baron Grenville | Whig | 1806-7 |
| Duke of Portland | Tory | 1807-9 |
| Spencer Perceval | Tory | 1809-12 |
| Earl of Liverpool | Tory | 1812-27 |
| George Canning | Tory | 1827 |
| Viscount Goderich(later earl of Ripon) | Tory | 1827-28 |
| Duke of Wellington | Tory | 1828-30 |
| Earl Grey | Whig | 1830-34 |
| Viscount Melbourne | Whig | 1834 |
| Sir Robert Peel | Tory | 1834-35 |
| Viscount Melbourne | Whig | 1835-41 |
| Sir Robert Peel | Conservative | 1841-46 |
| Lord John Russell(later Earl Russell) | Whig | 1846-52 |
| Earl of Derby | Conservative | 1852 |
| Earl of Aberdeen | Peelite Conservative | 1852-55 |
| Viscount Palmerston | Liberal | 1855-58 |
| Earl of Derby | Conservative | 1858-59 |
| Viscount Palmerson | Liberal | 1859-65 |
| Earl Russell | Liberal | 1865-66 |
| Earl of Derby | Conservative | 1866-68 |
| Benjamin Disraeli | Conservative | 1868 |
| William Gladstone | Liberal | 1868-74 |
| Benjamin Disraeli | Conservative | 1874-80 |
| William Gladstone | Liberal | 1880-85 |
| Marquess of Salisbury | Conservative | 1885-86 |
| William Gladstone | Liberal | 1886 |
| Marquess of Salisbury | Conservative | 1886-92 |
| William Gladstone | Liberal | 1892-94 |
| Earl of Rosebery | Liberal | 1894-95 |
| Marquess of Salisbury | Conservative | 1895-1902 |
| Arthur Balfour | Conservative | 1902-5 |
| Sir Henry Campbell-Bannerman | Liberal | 1905-8 |
| Herbert Asquith | Liberal | 1908-15 |
| Herbert Asquith | Coalition | 1915-16 |
| David Lloyd George | Coalition | 1916-22 |
| Andrew Bonar Law | Conservative | 1922-23 |
| Stanley Baldwin | Conservative | 1923-24 |
| Ramsay MacDonald | Labour | 1924 |
| Stanley Baldwin | Conservative | 1924-29 |
| Ramsay MacDonald | Labour | 1929-31 |
| Ramsay MacDonald | National (Coalition) | 1931-35 |
| Stanley Baldwin | National | 1935-37 |
| Neville Chamberlain | National | 1937-40 |
| Winston Churchill | Coalition | 1940-45 |
| Clement Attlee | Labour | 1945-51 |
| Sir Winston Churchill | Conservative | 1951-55 |
| Sir Anthony Eden | Conservative | 1955-57 |
| Harold Macmillan | Conservative | 1957-63 |
| Sir Alec Douglas-Home | Conservative | 1963-64 |
| Harold Wilson | Labour | 1964-70 |
| Edward Heath | Conservative | 1970-74 |
| Harold Wilson | Labour | 1974-76 |
| James Callaghan | Labour | 1976-79 |
| Margaret Thatcher | Conservative | 1979-90 |
| John Major | Conservative | 1990-97 |
| Tony Blair | Labour | 1997-2007 |
| Gordon Brown | Labour | 2007-10 |
| David Cameron | Coalition | 2010- |
The Columbia Electronic Encyclopedia, Sixth Edition Copyright © 2012, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/.
