Earl of Dudley, of Dudley Castle in the County of Stafford, is a title that has been created twice in the Peerage of the United Kingdom, both times for members of the Ward family.

Dudley Castle is a ruined fortification in the town of Dudley, West Midlands, England. Originally a wooden motte and bailey castle built soon after the Norman Conquest, it was rebuilt as a stone fortification during the twelfth century but subsequently demolished on the orders of Henry II of England. Rebuilding of the castle took place from the second half of the thirteenth century and culminated in the construction of a range of buildings within the fortifications by John Dudley. The fortifications were slighted by order of the Parliament of England during the English Civil War and the residential buildings destroyed by fire in 1750. In the nineteenth and early twentieth century the site was used for fêtes and pageants. Today Dudley Zoo is located on its grounds.