William Bentinck may refer to:
William Bentinck (Royal Navy officer) (1764–1813), Royal Navy officer Lord William Bentinck (1774–1839), British soldier and statesman William Bentinck, 1st Earl of Portland (1649–1709), Knight of the Garter William Bentinck, 2nd Duke of Portland (1709–1762), Knight of the Garter William Bentinck, 4th Duke of Portland (1768–1854), British politician William Bentinck (priest) (1784–1868), Archdeacon of Westminster William Bentinck, Viscount Woodstock (born 1984), British entrepreneur
See also William Cavendish-Bentinck (disambiguation) William Cavendish-Scott-Bentinck, 5th Duke of Portland (1800–1879), British aristocrat , a number of ships with this name