The title of Earl of Northumberland was created several times in the Peerages of England and Great Britain. Its most famous holders were the Percies, who were the most powerful noble family in Northern England for much of the Middle Ages. The heirs of the Percies were ultimately made Duke of Northumberland in 1766.
Earls of Northumberland, first Creation (1072)
Earls of Northumberland, second Creation (1076)
Earls of Northumberland, third Creation (1080)
Earls of Northumberland, fourth Creation (1086)
Earls of Northumberland, fifth Creation (1139)
Earls of Northumberland, sixth Creation (1189)
Earls of Northumberland, seventh Creation (1377)
Earls of Northumberland, eighth Creation (1416)
Earls of Northumberland, ninth Creation (1464)
Earls of Northumberland, tenth Creation (1557)
Earls of Northumberland, eleventh Creation (1674)
Earls of Northumberland, twelfth Creation (1749)
See Duke of Northumberland, third creation