Prime Ministers of the United Kingdom (British Prime Ministers)   Dates Prime Minister Party 1 1721-1742 Sir Robert Walple Whig 2 1742-1742 Earl of Wilmington (Spencer Compton) Whig 3 1743-1754 Henry Pelham Whig 4 1754-1756 Duke of Newcastle (Thomas Pelham-Holles) Whig 5 1756-1757 Duke of Devonshire (William Cavendish) Whig 6 1762-1763 Earl of Bute (John Stuart) Tory 7 1763-1765 George Grenville Whig 8 1765-1766 Marquess of Rockingham (Charles Watson Wentworth) Whig 9 1766-1768 Earl of Chatham (William Pitt the Elder) Whig 10 1767-1770 Duke of Grafton (August Henry Fitzroy) Whig 11 1770-1782 Lord North (frederick North) Tory 12 1782 Marquess of Rockingham Whig 13 1782-1783 Earl of Shelburne (William Petty-Fitzmaurice) Whig 14 1783 Duke of Portland (William Henry Cavendish) Coalition 15 1783-1801 William Pitt the Younger Tory 16 1801-1804 Henry Addington Tory 17 1804-1806 William Pitt the Younger Tory 18 1806-1807 Lord Grenville (William Wyndham) whig 19 1807-1809 Duke of Portland Tory 20 1809-1812 Spencer Percival Tory 21 1812-1827 Lord Liverpool Tory 22 1827 George Canning Tory 23 1827-1828 Viscount Goderich Tory 24 1828-1830 Duke of Wellington Tory 25 1830-1834 Earl Grey Whig 26 1834 Viscount Melbourne Whig 27 1834-1835 Sir Robert Peel Tory 28 1835-1841 Viscount Melbourne Whig 29 1841-1846 Sir Robert Peel Tory 30 1846-1852 Lord John Russell Whig 31 1852 Earl of Derby Tory 32 1852-1855 Earl of Aberdeen Peelite 33 1855-1858 Viscount Palmerston Liberal 34 1858-1859 Earl of Derby Conservative 35 1859-1865 Viscount Palmerston Liberal 36 1865-1866 Earl Russell Liberal 37 1866-1868 Earl of Derby Conservative 38 1868 Benjamin Disraeli Conservative 39 1868-1874 William Gladstone Liberal 40 1874-1880 Benjamin Disraeli Conservative 41 1880-1885 William Gladstone Liberal 42 1885-1886 Marquess of Salisbury Conservative 43 1886 William Gladstone Liberal 44 1886-1892 Marquess of Salisbury Conservative 45 1892-1894 Willliam Gladstone Liberal 46 1894-1895 Earl of Rosebery Liberal 47 1895-1902 Marquess of Salisbury Conservative 48 1902-1905 Arthur Balfour Conservative 49 1905-1908 Sir Henry Campbell-Bannerman Liberal 50 1908-1915 Herbert Asquith Liberal Content provided by: Larry Gormley, HistoryShots Source(s): Chambers Book of Facts. Melanie Parry Editor, 10 Downing Street Web Site