William George Hylton Jolliffe, 1st Baron Hylton PC (7 December 1800 – 1 June 1876), known as Sir William Jolliffe, Bt, between 1821 and 1866, was a British soldier and Conservative politician. He was a member of the Earl of Derby's first two administrations as Under-Secretary of State for the Home Department in 1852 and as Parliamentary Secretary to the Treasury between 1858 and 1859.