First Newcastle ministry
From 1754 to 1756 the Duke of Newcastle headed the government of Great Britain. After the death of the previous Prime Minister, his brother Henry Pelham, Newcastle had formed a fresh administration. He remained in power until 1756, when his government collapsed following the fall of Minorca and the fierce criticism that he had come under for his handling of the war that was engulfing Europe. Among the most influential members of the Ministry was Henry Fox, who served as Leader of the House of Commons from November 1755, having firstly entered the Cabinet in his earlier position of Secretary at War in December 1754.
Newcastle later returned to head a second government in 1757 in an alliance with William Pitt the Elder.
The Ministry
It is unclear who was member of the Cabinet.| Office | Name | Term |
| First Lord of the Treasury | The Duke of Newcastle | 1754–1756 |
| Leader of the House of Lords | The Duke of Newcastle | 1754–1756 |
| Chancellor of the Exchequer | Sir William Lee | 1754 |
| Chancellor of the Exchequer | Henry Bilson Legge | 1754–1755 |
| Chancellor of the Exchequer | Sir George Lyttelton, Bt. | 1755–1756 |
| Second Lord of the Treasury | The Earl of Darlington | 1754–1755 |
| Second Lord of the Treasury | Sir George Lyttelton, Bt. | 1755–1756 |
| Lord Chancellor | The Lord Hardwicke, later The Earl of Hardwicke | 1754–1756 |
| Lord President of the Council | The Earl Granville | 1754–1756 |
| Lord Privy Seal | The Earl Gower | 1754 |
| Lord Privy Seal | The Duke of Marlborough | 1755 |
| Lord Privy Seal | The Earl Gower | 1755–1756 |
| Secretary of State for the Southern Department Leader of the House of Commons | Thomas Robinson | 1754–1755 |
| Secretary of State for the Southern Department Leader of the House of Commons | Henry Fox | 1755–1756 |
| Secretary of State for the Northern Department | The Earl of Holdernesse | 1754–1756 |
| Master-General of the Ordnance | Vacant | 1754–1755 |
| Master-General of the Ordnance | The Duke of Marlborough | 1755–1756 |
| First Lord of the Admiralty | The Lord Anson | 1754–1756 |
| Keeper of the Great Seal of Scotland | The Duke of Argyll | 1754–1756 |
| Lord Chamberlain of the Household | The Duke of Grafton | 1754–1756 |
| Lord Steward of the Household | The Duke of Marlborough | 1754–1755 |
| Lord Steward of the Household | The Duke of Rutland | 1755–1756 |
| Chancellor of the Duchy of Lancaster | The Lord Edgcumbe | 1754–1756 |
| Lord Lieutenant of Ireland | The Duke of Dorset | 1754–1755 |
| Lord Lieutenant of Ireland | The Duke of Devonshire | 1755–1756 |
| Master of the Horse | Marquess of Hartington | 1754–1755 |
| Master of the Horse | The Duke of Dorset | 1755–1756 |
| Paymaster of the Forces | William Pitt the Elder | 1754–1755 |
| Paymaster of the Forces | jointly: | 1755–1756 |