Dudley Ryder 2nd Earl of Harrowby
 Dudley Ryder 2nd Earl of Harrowby KG PC FRS (19 May 1798 – 19 November 1882) styled Viscount Sandon between 1809 and 1847 was a British politician. He held office under Lord Palmerston as Chancellor of the Duchy of Lancaster in 1855 and as Lord Privy Seal between 1855 and 1857.