The Duke of Portland
Prime Minister of the United Kingdom
In office 2 April 1783 – 19 December 1783 31 March 1807–4 October 1809
Preceded by	The Earl of Shelburne The Lord Grenville
Succeeded by	William Pitt the Younger Spencer Perceval
Personal details
Born	(1738-04-14)14 April 1738 Nottinghamshire
Died	30 October 1809(1809-10-30) (aged 71) Bulstrode Park, Buckinghamshire
Political party	Whig, later Tory

William Henry Cavendish Cavendish-Bentinck, 3rd Duke of Portland, (14 April 1738 – 30 October 1809) was a British Whig and Tory statesman and twice Prime Minister of the United Kingdom of Great Britain. After his first time as prime minister, the kingdom of Ireland joined Great Britain to form the United Kingdom of Great Britain and Ireland. In the new Parliament of the United Kingdom, he again became prime minister in 1807.

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