Duke of Ciudad Rodrigo () is a hereditary title in the Peerage of Spain, accompanied by the dignity of Grandee. It was conferred by Ferdinand VII on the British General Arthur Wellesley, then 1st Viscount Wellington, later 1st Duke of Wellington in 1812, after his important victory at the Siege of Ciudad Rodrigo that same year, as a victory title. As all dukedoms in the peerage of Spain, it has Grandeeship attached.