|The Right Honourable
|Lord Chancellor of Ireland|
|Prime Minister||The Lord Grenville|
|Preceded by||The Lord Redesdale|
|Succeeded by||The Lord Manners|
|Born||5 March 1755|
|Died||8 July 1817|
|Alma mater||Trinity College, Cambridge|
Background and education
Ponsonby was the second surviving son of the Honourable John Ponsonby, speaker of the Irish House of Commons (1756–71), and his wife, Lady Elizabeth Cavendish (1723–1796), daughter of William Cavendish, 3rd Duke of Devonshire. He was educated at Kilkenny College and at Trinity College, Cambridge.
Legal and political career
A barrister, Ponsonby became a member of the Irish Parliament in 1776. He sat for Wicklow Borough between 1778 and 1783 and subsequently for Inistioge between 1783 and 1797. From 1798 until the Act of Union in 1801, he represented Galway Borough. Ponsonby was chancellor of the Irish exchequer in 1782, afterwards taking a prominent part in the debates on the question of Roman Catholic relief, and leading the opposition to the union of the parliaments.
After 1801 Ponsonby represented Wicklow and then Tavistock in the Parliament of the United Kingdom; in 1806 to 1807 he was Lord Chancellor of Ireland, and from 1808 to 1817 he was the recognised leader of the opposition in the British House of Commons.
Ponsonby had been selected as the first recognised leader of the opposition, rather than leader of an opposition, when the two leading Whig peers Lord Grenville and Earl Grey, proposed him to Whig MPs. Ponsonby was described by Foorde as "a little known mediocrity who was related to Lady Grey". He proved to be a weak leader, but was unwilling to resign and so retained the leadership of the party in the House of Commons until his death. He was succeeded as party leader by George Tierney.
- Parliamentary Election Results in Ireland, 1801–1922, edited by B. M. Walker (Royal Irish Academy 1978)
- His Majesty's Opposition 1714–1830, by Archibald S. Foorde (Oxford University Press 1964)
- This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press.
- Hansard 1803–2005: contributions in Parliament by George Ponsonby