William Marsden (16 November 1754 – 6 October 1836) was an English orientalist, linguist, numismatist, and pioneer in the scientific study of Indonesia, serving as first secretary of the Admiralty during years of conflict with France.
In 1805, Marsden received the bittersweet news of victory in the Battle of Trafalgar and of the death of Admiral Horatio Nelson in the battle.