| Office | Name | Date | Party | Notes |
Prime Minister, First Lord of the Treasury and Leader of the House of Commons | H. H. Asquith | 25 May 1915 – 5 December 1916 | Liberal | |
| Chancellor of the Exchequer | Reginald McKenna | 25 May 1915 | Liberal | |
| Parliamentary Secretary to the Treasury | John Gulland | 30 May 1915 – 5 December 1916 | Liberal | Joint Government Chief Whips in the House of Commons |
| Lord Edmund Talbot | 30 May 1915 – 5 December 1916 | Conservative |
| Financial Secretary to the Treasury | Edwin Samuel Montagu | 26 May 1915 | Liberal | entered cabinet 16 January 1916 |
| Thomas McKinnon Wood | 9 July 1916 | Liberal | |
| Junior Lords of the Treasury | Geoffrey Howard | 30 May 1915 – 5 December 1916 | Liberal | |
| George Henry Roberts | 30 May 1915 – 5 December 1916 | Labour | |
| William Bridgeman | 30 May 1915 – 5 December 1916 | Conservative | |
| Walter Rea | 30 May 1915 – 5 December 1916 | Liberal | |
| Lord Chancellor | The Lord Buckmaster | 25 May 1915 | Liberal | |
Lord President of the Council and Leader of the House of Lords | The Marquess of Crewe | 25 May 1915 | Liberal | |
| Lord Privy Seal | The Earl Curzon of Kedleston | 25 May 1915 | Conservative | |
| Secretary of State for the Home Department | Sir John Simon | 25 May 1915 | Liberal | |
| Herbert Samuel | 10 January 1916 | Liberal | |
| Under-Secretary of State for the Home Department | William Brace | 30 May 1915 | Labour | |
| Secretary of State for Foreign Affairs | Sir Edward Grey | 25 May 1915 | Liberal | created Viscount Grey of Fallodon 27 July 1916 |
| Parliamentary Under-Secretary of State for Foreign Affairs | Lord Robert Cecil | 30 May 1915 | Conservative | in cabinet 23 February 1916 |
| Secretary of State for the Colonies | Andrew Bonar Law | 25 May 1915 | Conservative | |
| Under-Secretary of State for the Colonies | Arthur Steel-Maitland | 30 May 1915 | Conservative | |
| Secretary of State for War | The Earl Kitchener | 25 May 1915 | | |
| David Lloyd George | 6 July 1916 | Liberal | |
| Under-Secretary of State for War | Harold Tennant | 30 May 1915 | Liberal | |
| The Earl of Derby | 6 July 1916 | Conservative | |
| Financial Secretary to the War Office | Henry Forster | 30 May 1915 | Conservative | |
| Secretary of State for India | Austen Chamberlain | 25 May 1915 | Conservative | |
| Under-Secretary of State for India | The Lord Islington | 30 May 1915 | Liberal | |
| First Lord of the Admiralty | Arthur Balfour | 25 May 1915 | Conservative | |
| Parliamentary and Financial Secretary to the Admiralty | Thomas James Macnamara | 30 May 1915 | Liberal | |
| Civil Lord of the Admiralty | The Duke of Devonshire | 9 June 1915 | Conservative | also Joint Government Chief Whip in the House of Lords |
| The Earl of Lytton | 26 July 1916 | Conservative | |
| President of the Board of Agriculture and Fisheries | The Earl of Selborne | 25 May 1915 | Conservative | |
| The Earl of Crawford | 11 July 1916 | Conservative | |
| Parliamentary Secretary to the Board of Agriculture and Fisheries | Francis Dyke Acland | 30 May 1915 | Liberal | |
| Minister of Blockade | Lord Robert Cecil | 23 February 1916 | Conservative | |
| President of the Board of Education | Arthur Henderson | 25 May 1915 | Labour | |
| The Marquess of Crewe | 18 August 1916 | Liberal | also Leader of the House of Lords |
| Parliamentary Secretary to the Board of Education | Herbert Lewis | 30 May 1915 | Liberal | |
| President of the Local Government Board | Walter Long | 25 May 1915 | Conservative | |
| Parliamentary Secretary to the Local Government Board | William Fisher | 30 May 1915 | Conservative | |
| Chief Secretary for Ireland | Augustine Birrell | 25 May 1915 – 3 May 1916 | Liberal | |
| Henry Duke | 31 July 1916 | Conservative | |
| Vice President of the Department of Agriculture for Ireland | Thomas Russell | 30 May 1915 | Liberal | |
| Chancellor of the Duchy of Lancaster | Winston Churchill | 25 May 1915 | Liberal | |
| Herbert Samuel | 25 November 1915 | Liberal | |
| Edwin Samuel Montagu | 11 January 1916 | Liberal | |
| Thomas McKinnon Wood | 9 July 1916 | Liberal | |
| Minister of Munitions | David Lloyd George | 25 May 1915 | Liberal | |
| Edwin Samuel Montagu | 9 July 1916 | Liberal | |
| Parliamentary Secretary to the Ministry of Munitions | Christopher Addison | 30 May 1915 – 8 December 1916 | Liberal | |
| Arthur Lee | 11 November 1915 – 9 July 1916 | Conservative | |
| Paymaster-General | The Lord Newton | 9 June 1915 | Conservative | |
| Arthur Henderson | 18 August 1916 | Labour | |
| Minister without Portfolio | The Marquess of Lansdowne | 25 May 1915 | Conservative | |
| Postmaster-General | Herbert Samuel | 26 May 1915 | Liberal | |
| Joseph Pease | 18 January 1916 | Liberal | |
| Assistant Postmaster-General | Herbert Pease | 30 May 1915 | Conservative | |
| Secretary for Scotland | Thomas McKinnon Wood | 25 May 1915 | Liberal | |
| Harold Tennant | 9 July 1916 | Liberal | |
| President of the Board of Trade | Walter Runciman | 25 May 1915 | Liberal | |
| Parliamentary Secretary to the Board of Trade | E. G. Pretyman | 30 May 1915 | Conservative | |
| First Commissioner of Works | Lewis Harcourt | 25 May 1915 | Liberal | |
| Attorney-General | Sir Edward Carson | 25 May 1915 | Conservative | |
| Sir F. E. Smith | 3 November 1915 | Conservative | |
| Solicitor-General | Sir F. E. Smith | 2 June 1915 | Conservative | |
| Sir George Cave | 8 November 1915 | Conservative | |
| Lord Advocate | Robert Munro | 8 June 1915 | Liberal | |
| Solicitor General for Scotland | Thomas Brash Morison | 8 June 1915 | Liberal | |
| Attorney General for Ireland | John Gordon | 8 June 1915 | Conservative | |
| James Campbell | 9 April 1916 | Conservative | |
| Solicitor General for Ireland | James O'Connor | 8 June 1915 | Irish Nationalist | |
| Lord Steward of the Household | The Lord Farquhar | 9 June 1915 | Conservative | |
| Lord Chamberlain of the Household | The Lord Sandhurst | 9 June 1915 | Liberal | |
| Vice-Chamberlain of the Household | Cecil Beck | 30 May 1915 | Liberal | |
| Master of the Horse | The Earl of Chesterfield | 9 June 1915 | Liberal | |
| Treasurer of the Household | James Hope | 30 May 1915 | Conservative | |
| Comptroller of the Household | Charles Henry Roberts | 30 May 1915 | Liberal | |
| Captain of the Gentlemen-at-Arms | The Lord Colebrooke | 9 June 1915 | Liberal | also Joint Government Chief Whip in the House of Lords |
| Captain of the Yeomen of the Guard | The Lord Suffield | 9 June 1915 | Conservative | |
| Lords in Waiting | The Lord Herschell | 9 June 1915 | Liberal | |
| The Viscount Allendale | 9 June 1915 | Liberal | |
| The Lord Stanmore | 9 June 1915 | Liberal | |
| The Lord Ranksborough | 9 June 1915 | Liberal | |
| The Viscount Valentia | 9 June 1915 | Conservative | |
| The Lord Hylton | 9 June 1915 | Conservative | Joint Government Chief Whip in the House of Lords from 26 July 1916 |