Francis Seymour-Conway, 3rd Marquess of Hertford

The Most Honourable The Marquess of Hertford KG, GCH PC
The Marquess of Hertford.
Vice-Chamberlain of the Household
In office 14 March 1812 – 28 July 1812
Monarch	George III
Prime Minister	Spencer Perceval The Earl of Liverpool
Preceded by	Lord John Thynne
Succeeded by	Viscount Jocelyn
Personal details
Born	11 March 1777
Died	1 March 1842 (1842-04) (aged 64)
Nationality	British
Political party	Tory
Spouse(s)	Maria Emilia Fagnani (1771–1856)

Francis Charles Seymour-Conway, 3rd Marquess of Hertford KG, GCH PC (11 March 1777 – 1 March 1842), styled Viscount Beauchamp between 1793 and 1794 and Earl of Yarmouth between 1794 and 1822, was a British Tory politician and art collector.

Seymour-Conway was the son of Francis Seymour-Conway, 2nd Marquess of Hertford, by his second wife Isabella Anne Ingram, daughter of Charles Ingram, 9th Viscount of Irvine.

Lord Yarmouth sat as Member of Parliament (MP) for Orford from 1797 to 1802, for Lisburn from 1802 to 1812, for Antrim from 1812 to 1818 and for Camelford from 1820 to 1822. In March 1812 he was sworn of the Privy Council and appointed Vice-Chamberlain of the Household under Spencer Perceval. He continued in the post after Lord Liverpool became prime minister in May 1812 after Perceval's assassination, but relinquished it in July of that year. The same year he was appointed Lord Warden of the Stannaries, a post he held until his death. He succeeded his father in the marquessate in 1822. The same year he was also made a Knight of the Garter and appointed Vice-Admiral of Suffolk, a post he retained until his death.