General Charles Stanhope, 3rd Earl of Harrington GCH PC PC (Ire) (17 March 1753 – 5 September 1829), styled Viscount Petersham until 1779, was a British Army officer and politician who sat in the House of Commons between 1774 and 1779 when he succeeded to the peerage as Earl of Harrington.

Stanhope was the son of William Stanhope, 2nd Earl of Harrington, and Lady Caroline FitzRoy, daughter of Charles FitzRoy, 2nd Duke of Grafton, and Lady Henrietta Somerset, daughter of Charles Somerset, Marquess of Worcester, and Rebecca Child.

[1] During the Saratoga campaign of the American Revolutionary War as Viscount Petersham, he commanded the 29th Regiment of Foot's Grenadier company and was an aide-de-camp to General John Burgoyne.

From 1805 to 1812 he was Commander-in-Chief, Ireland, and he was sent on diplomatic errands to Vienna and to Berlin.

[4] Lord and Lady Harrington had eleven children: