William Horace Pitt-Rivers, 3rd Baron Rivers, known as Horace Beckford until 1828, was a British peer and gambler. The only son of Peter Beckford and Louisa Pitt who came of age, he married Frances Rigby on 9 February 1808, in the house of her father, Lieutenant-Colonel Francis Hale Rigby in Upper Grosvenor Street, London. They had four children:George Pitt-Rivers, 4th Baron Rivers (1810–1866)
- Occupation
- politician, plantation owner
- Citizenship
- Kingdom of Great Britain, United Kingdom of Great Britain and Ireland
- Born
- December 2, 1777
- Died
