UK Elections Info

Data Last Updated: 7 August 2025
Application Last Amended: 20 July 2024
This website is considered to be an archive in the public interest.

William Cavendish Bentinck

Born: 14 April 1738, Bulstrode, Buckinghamshire

Died: 30 October 1809

3rd Duke of Portland - 1 May 1762

husband of Dorothy Cavendish

Eton College

Christ Church, Oxford

Lord Chamberlain of the Household	July 1765	1766
Lord-Lieutenant of Ireland	1782	1783
Prime Minister and First Lord of the Treasury	2 April 1783	19 December 1783
Secretary of State for the Home Department	1794	1801
Lord President of the Council	30 July 1801	14 January 1805
Prime Minister and First Lord of the Treasury	31 March 1807	4 October 1809

28 March 1761		Weobley
1 May 1762 Succession of William Cavendish Bentinck to the Peerage - 3rd Duke of Portland.