The Dukedom of Cleveland was a peerage in the Peerage of England, and later in the Peerage of the United Kingdom. The first creation was for Barbara Palmer, the mistress of King Charles II. The Dukedom of Southampton was created, along with the Earldom of Chichester and Barony of Newbury, for Charles Fitzroy, the illegitimate son of Charles and the Duchess of Cleveland. In 1709, the Duke of Southampton inherited the Dukedom of Cleveland; both dukedoms became extinct in 1774. The Dukedom of Southampton has not been created again.
The Dukedom of Cleveland was created again in 1833 for the third Earl of Darlington, along with the title Baron Raby. He was a great-grandson of Charles, Duke of Cleveland and Southampton, and had been created Marquess of Cleveland in 1827. The title became extinct again in 1891.