John Pratt, 1st Marquess Camden

The Most Honourable
The Marquess Camden
KG PC FSA
The Most Honourable The Marquess Camden KG PC FSA
	Portrait by William Salter
Lord Lieutenant of Ireland
	In office; 13 March 1795 – 14 June 1798
Monarch	George III
Prime Minister	William Pitt the Younger
Preceded by	The Earl Fitzwilliam
Succeeded by	The Marquess Cornwallis
Secretary of State for War; and the Colonies
	In office; 14 May 1804 – 10 July 1805
Monarch	George III
Prime Minister	William Pitt the Younger
Preceded by	Lord Hobart
Succeeded by	Viscount Castlereagh
Lord President of the Council
	In office; 10 July 1805 – 19 February 1806
Monarch	George III
Prime Minister	William Pitt the Younger
Preceded by	Viscount Sidmouth
Succeeded by	The Earl Fitzwilliam
	In office; 26 March 1807 – 8 April 1812
Monarch	George III
Prime Minister	The Duke of Portland; Spencer Perceval
Preceded by	Viscount Sidmouth
Succeeded by	Viscount Sidmouth
Member of Parliament; for Bath
	In office; 1780–1794
Preceded by	Sir John Sebright, Bt
Succeeded by	Sir Richard Arden
Personal details
Born	11 February 1759; Lincoln's Inn Fields, London
Died	8 October 1840 (aged 81); Seal, Kent
Party	Tory
Spouse(s)	Frances Molesworth; (d. 1829)
Alma mater	Trinity College, Cambridge

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John Jeffreys Pratt, 1st Marquess Camden (11 February 1759 – 8 October 1840), styled Viscount Bayham from 1786 to 1794 and known as the 2nd Earl Camden from 1794 to 1812, was a British politician. He served as Lord Lieutenant of Ireland in the revolutionary years 1795 to 1798 and as Secretary of State for War and the Colonies between 1804 and 1805.