The first creation came in the Peerage of England in 1685 when Henry Jermyn was made Baron Dover.
In 1703 he also succeeded his elder brother as Baron Jermyn.
The second creation came in the Peerage of Great Britain in 1788 when then soldier General Sir Joseph Yorke was made Lord Dover, Baron of the Town and Port of Dover, in the County of Kent.
The peerage became extinct on Lord Dover's death in 1792.
The third creation came in the Peerage of the United Kingdom in 1831 when the politician George Agar-Ellis was created Baron Dover, of Dover in the County of Kent.