George Hay, 7th Marquess of Tweeddale DL (1753 – 9 August 1804) was a Scottish peer.
Hay was a great-grandson of the 2nd Marquess of Tweeddale, and in 1787 he inherited the titles of his first cousin once-removed, the 6th Marquess. He then became a Burgess of Edinburgh a year later, Lord Lieutenant of Haddingtonshire in 1794, and a Scottish representative peer in 1796. On 18 April 1785, he married Lady Hannah Maitland (a daughter of the 7th Earl of Lauderdale) and they had (with two other unmarried daughters):
George, Earl of Gifford; later 8th Marquess of Tweeddale (1787–1876)
Lord James (1788–1862), army general, married Elizabeth Forbes
Lord John (1793–1851), rear-admiral, married Mary Cameron
Lord Edward George (1799–1862), colonel, died unmarried
Lord Thomas (1800–1890), religious minister, married Harriet Kinloch
Lady Julia Tomasina (178ì97;d. 1835), married John Hobhouse the 1st Baron Broughton
Ladu Elizabeth (d. 1868), married James Hope-Vere (a great-grandson of the 1st Earl of Hopetoun)
Lady Dorothea Frances (d. 1875), married John Ley
Lady Hannah Charlotte (d. 1876), married John Tharp (a grandson of the 4th Earl of Dunmore)
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.