Earl of Northumberland

Earldom of Northumberland later a subsidiary title of the Duke of Northumberland
Arms of Ralph Percy, 12th Duke of Northumberland and 13th Earl of Northumberland (5th creation)
Creation date	1377 (1st creation) 1416 (2nd creation) 1464 (3rd creation) 1674 (4th creation) 1749 (5th creation)
Created by	Richard II (1st creation) Henry V (2nd creation) Henry VI (3rd creation) Edward VI (2nd creation restored) Charles II (4th creation) George II (5th creation)
Peerage	Peerage of England (1st to 4th creations) Peerage of Great Britain (5th creation)
First holder	Henry Percy
Present holder	Ralph Percy, 12th Duke of Northumberland
Heir apparent	George Percy, Earl Percy
Status	Fifth creation extant
Extinction date	1405 (1st creation) 1461(2nd creation forfeit) 1471 (3rd creation) 1670 (2nd creation extinct) 1683 (4th creation)
Seat(s)	Alnwick Castle Syon House

The title of Earl of Northumberland has been created several times in the Peerage of England and of Great Britain, succeeding the title Earl of Northumbria. Its most famous holders are the House of Percy (alias Perci), who were the most powerful noble family in Northern England for much of the Middle Ages. The heirs of the Percys, via a female line, were ultimately made Duke of Northumberland in 1766, and continue to hold the earldom as a subsidiary title.^{[citation needed]}