Admiral The Honourable Duncombe Pleydell-Bouverie (28 June 1780 – 5 November 1850), was a British naval commander and Whig politician.
Pleydell-Bouverie was the second son of Jacob Pleydell-Bouverie, 2nd Earl of Radnor, and the Honourable Anne Duncombe, daughter of Anthony Duncombe, 1st Baron Feversham. William Pleydell-Bouverie, 3rd Earl of Radnor, was his elder brother.
Pleydell-Bouverie served in the Royal Navy. Lieutenant Pleydell-Bouverie was promoted to Commander on 14 February 1801, but did not take command of HMS Penguin until 28 August. Bouverie was promoted to post captain in HMS Braave on 2 April 1802. Eventually he became an Admiral.
He also sat as Member of Parliament for Downton between 1806 and 1807 and for Salisbury between 1828 and 1832 and again from 1833 to 1835. He is not recorded as having ever spoken in the House of Commons. He hoisted his flag in HMS Victory as Port Admiral at Portsmouth in 1837.
Pleydell-Bouverie married Louisa, daughter of Joseph May, in 1809. He died in November 1850, aged 70.