| Honorific Prefix: | The Most Honourable |
| The Marquess of Waterford | |
| Honorific Suffix: | KP PC (Ire) |
| Office: | Member of Parliament for Coleraine |
| Term Start: | 1761 |
| Term End: | 1763 |
| Predecessor: | Richard Jackson Hamilton Gorges |
| Alongside: | Richard Jackson |
| Successor: | Richard Jackson George Paul Monck |
| Office1: | Member of Parliament for County Waterford |
| Term Start1: | 1757 |
| Term End1: | 1760 |
| Predecessor1: | Beverley Ussher Aland Mason |
| Alongside1: | Aland Mason, James May |
| Successor1: | James May Hon. John Beresford |
| Birth Name: | George de la Poer Beresford |
| Birth Date: | 8 January 1735 |
| Education: | Kilkenny College |
| Alma Mater: | Trinity College Dublin |
| Parents: | Marcus Beresford, 1st Earl of Tyrone Lady Catherine Power |
| Children: | 10, including Henry Beresford, 2nd Marquess of Waterford |
George de la Poer Beresford, 1st Marquess of Waterford, KP, PC (Ire) (8 January 1735 - 3 December 1800), styled Earl of Tyrone from 1763 to 1789, was an Anglo-Irish politician.
Beresford was the eldest surviving son of Marcus Beresford, 1st Earl of Tyrone and his wife, Lady Catherine Power, suo jure Baroness de la Poer. Among his siblings were the Hon. John Beresford, MP (who married Countess Anne Constantin de Ligondes),[1] and William Beresford, 1st Baron Decies (who married Elizabeth FitzGibbon, sister of John FitzGibbon, 1st Earl of Clare).[2]
His mother was the only daughter and heiress of James Power, 3rd Earl of Tyrone (who was also the 8th Baron Power), of Curraghmore, County Waterford. His father was the only son of Sir Tristram Beresford, 3rd Baronet, and his wife Nichola Sophia Hamilton (youngest daughter of Hugh Hamilton, 1st Viscount of Glenawly).[3]
He was educated at Kilkenny College[4] and Trinity College Dublin.[5]
From 1757 to 1760, he was a Member of the Irish House of Commons for County Waterford from 1757 to 1760, and for Coleraine from 1761 until 1763, when he inherited his father's earldom, entered the Irish House of Lords and was admitted to the Privy Council of Ireland.[6]
He was Governor of Waterford from 1766 and custos rotulorum of that county from 1769 to 1800, during which time he was made a Knight of St Patrick, created Baron Tyrone in the Peerage of Great Britain in 1786, and elevated as a marquess in 1789.
On 19 April 1769, he married Elizabeth Monck, the daughter of Henry Monck, of Charleville, and the former Lady Isabella Bentinck (second daughter of Henry Bentinck, 1st Duke of Portland). Elizabeth was also the cousin of Charles Monck, 1st Viscount Monck. Together, they were the parents of eight children:
He also had two illegitimate sons, William Carr Beresford, 1st Viscount Beresford, and Sir John Beresford, 1st Baronet.[3]
Lord Waterford died in 1800 and his titles passed to his eldest surviving legitimate son, Henry.[7]