Henry Gage, 3rd Viscount Gage

Henry Gage, 3rd Viscount Gage (4 March 1761 – 29 January 1808) was a British Army officer.

Henry was the eldest son of General Thomas Gage, military leader of British Forces at the beginning of the American Revolution. He was elected Member of Parliament for Warwick from 1790, then inherited the title Viscount Gage in the Peerage of Ireland and Baron Gage in the Peerage of Great Britain from his uncle, William Gage on 11 October 1791. In 1789 he married his cousin, Susanna Maria. He served as a Major General in the British Army.

Through his wife, Gage inherited a large part of the American estate of Vice-Admiral Sir Peter Warren (Warren was Susanna's grandfather). The historic letters and documents from this inheritance were later donated to the Sussex Archaeological Society of Lewes.