| Honorific Prefix: | The Right Honourable |
| The Earl of Harrington | |
| Birth Name: | Charles Henry Leicester Stanhope |
| Birth Date: | 20 July 1945 |
| Tenure: | 12 April 2009 – present |
| Other Titles: | Viscount Petersham |
| Predecessor: | William Stanhope, 11th Earl of Harrington |
| Spouse: | |
| Issue: | William Stanhope, Viscount Petersham Serena Armstrong-Jones, Countess of Snowdon |
| Parents: | William Stanhope, 11th Earl of Harrington Eileen Foley Grey |
| Networth: | £250 million |
Charles Henry Leicester Stanhope, 12th Earl of Harrington (born 20 July 1945), styled as Viscount Petersham from birth until his father's death in 2009, is the son of William Stanhope, 11th Earl of Harrington, and his wife, Eileen Grey.
Charles Henry Leicester Stanhope was born 20 July 1945 to William Stanhope, 11th Earl of Harrington (1922–2009), and Eileen Grey, daughter of Sir John Foley Grey, 8th Baronet. He had two older sisters, the elder of whom was Lady Jane Stanhope (1942–1974), who married Anthony Cameron and was killed in a motor accident in 1974. His second sister is Lady Avena Margaret Clare Stanhope (b. 1944), who married Adrian Maxwell.
He was ranked 325th in the Sunday Times Rich List 2008 with an estimated wealth of £250 million. He is the owner of some prime land in London. Though the net assets of his two main companies, Elvaston Investments and Stanhope Gardens, came in at about £5 million in 2005, his total land holdings have been valued recently at about £250 million.
He married, firstly, Virginia Freeman-Jackson (b.1939), the daughter of Harry Freeman-Jackson on 14 September 1966, and they were divorced in 1983. They had two children and four grandchildren:
He married, secondly, the photographer Anita Fuglesang, formerly the wife of Michael Howard, 21st Earl of Suffolk.