William Beauclerk, 8th Duke of St Albans (18 December 1766 – 17 July 1825) was an English aristocrat.
Early life and career
thumb|right|Portrait of his [[Aubrey Beauclerk, 5th Duke of St Albans|father and mother, and his siblings Aubrey, Lady Catherine, and Lady Caroline, by Franciszek Smuglewicz.]]
William was born on 18 December 1766. He was the second son of Lady Catharine Ponsonby and Aubrey Beauclerk, 5th Duke of St Albans, a Whig Member of Parliament for Thetford from 1761 to 1768 and for Aldborough from 1768 to 1774. His elder brother was Aubrey Beauclerk, 6th Duke of St Albans (father of Aubrey Beauclerk, 7th Duke of St Albans). His younger brothers were Adm. Lord Amelius Beauclerk (principal Naval aide de camp to King William IV and Queen Victoria) and the Rev. Lord Frederick Beauclerk (Vicar of Kimpton, Redbourn and St Michael's who married Hon. Charlotte Dillon-Lee, the daughter of Charles Dillon-Lee, 12th Viscount Dillon). His sisters included Lady Catherine Beauclerk (wife of Rev James Burgess, Vicar of Hanworth), Lady Caroline Beauclerk (wife of Hon. Charles Dundas, fourth son of Thomas Dundas, 1st Baron Dundas). Before her death on 19 October 1797, they were the parents of one child:
- John Nelthorpe Beauclerk (1805–1810), who died in childhood.