| Honorific Prefix: | The Most Honourable |
| The Marquess of Tweeddale | |
| Office: | Lord Lieutenant of Haddingtonshire |
| Term Start: | 1794 |
| Term End: | 1804 |
| Predecessor: | New office |
| Birth Name: | George Hay |
| Birth Date: | 1753 |
| Birth Place: | East Lothian, Scotland |
| Death Place: | Verdun, France |
| Children: | 11 |
George Hay, 7th Marquess of Tweeddale DL (1753 - 9 August 1804) was a Scottish peer and naval officer.
Hay was born at Newhall in East Lothian, Scotland. He was the son of John Hay (d. 1765) and Dorothy (Hayhurst) Hay (d. 1808). His siblings included William Hay (who married Lady Catherine Hay, a daughter of the 4th Marquess of Tweeddale), Edward Hay-Mackenzie of Newhall (who married Hon. Maria Murray-Mackenzie, a daughter of the 6th Lord Elibank), Dorothea Hay (who married James Hay), and Margaret Hay (who married Allan Macdougall of Gallanach).
His maternal grandfather was John Hayhurst, a labourer who lived at Quernmore, Lancaster.[1] His paternal grandparents were Brig.-Gen. Lord William Hay, of Newham and Margaret Hay (daughter of John Hay of Linplum and granddaughter of Sir James Hay, 1st Baronet). He was a great-grandson of John Hay, 2nd Marquess of Tweeddale and the former Lady Mary Maitland (a daughter of John Maitland, 1st Duke of Lauderdale).
Hay served as an officer in the East India Company's Bombay Marine.[1]
In 1787 he inherited the titles of his first cousin once-removed, the 6th Marquess.[2] He then became a Burgess of Edinburgh a year later, Lord Lieutenant of Haddingtonshire in 1794, and a Scottish representative peer in 1796.[1]
On 18 April 1785, he married Lady Hannah Maitland, a daughter of James Maitland, 7th Earl of Lauderdale and the former Mary Turner Lombe (daughter and co-heiress of Sir Thomas Lombe, Alderman and Sheriff of London). Together, George and Hannah were the parents of eleven children, including:
As a result of the marquess's declining health, he and his wife went to travel the Continent in 1802, starting in France. It was here that they were captured by Napoleon's police a year later, with other British subjects, when war was renewed between the two countries. They were then imprisoned in the fortress at Verdun and the marchioness died there on 8 May 1804, as did the marquess during the following August on 9 August 1804.[5]