Duke of Northumberland

Dukedom of Northumberland
Arms of Percy, Dukes of Northumberland: Quarterly: 1st and 4th grandquarters: 1st and 4th counterquartered: 1st and 4th, Or a Lion rampant Azure (Brabant and Lovaine, Percy modern); 2nd and 3rd, Gules three Lucies hauriant Argent (Lucy); 2nd and 3rd, Azure five Fusils conjoined in fess Or (Percy ancient); 2nd and 3rd grandquarters: quarterly: 1st and 4th, Or three Bars wavy Gules (Drummond); 2nd and 3rd, Or a Lion's Head erased within a Double Tressure flory counterflory Gules (Drummond, coat of augmentation).
Creation date	1766
Creation	Third
Created by	King George III
Peerage	Peerage of Great Britain
First holder	Hugh Percy, 2nd Earl of Northumberland
Present holder	Ralph Percy, 12th Duke of Northumberland
Heir apparent	George Percy, Earl Percy
Remainder to	the 1st Duke's heirs male of the body lawfully begotten
Subsidiary titles	Earl of Northumberland Earl Percy Earl of Beverley Baron Warkworth Baron Lovaine Baronet, of Stanwick
Extinction date	1553 (first creation) 1683 (second creation)
Seat(s)	Alnwick Castle Syon House
Former seat(s)	Warkworth Castle Prudhoe Castle Kielder Castle Northumberland House Stanwick Park Albury Park

Duke of Northumberland is a noble title that has been created three times in English and British history, twice in the Peerage of England and once in the Peerage of Great Britain. The current holder of this title is Ralph Percy, 12th Duke of Northumberland.