House of Hohenzollern
Country Germany, Romania
Titles Count of Zollern
Margrave of Brandenburg
Duke of Prussia
Burgrave of Nuremberg
Margrave of Bayreuth
Margrave of Brandenburg-Ansbach
King of Prussia
Emperor of Germany
Prince of Neuchâtel
King of Romania
Founded 1100s AD
Founder Burgrave Frederick I of Nuremberg
Final ruler Prussia:
King Wilhelm II (1888–1934)
Emperor Ludwig Ferdinand (1951–1991)
Romania: King Michael (1927–1930, 1944–1989)
Current head Germany and Prussia:
HIH Prince Georg Friedrich (1994–)
HH Prince Karl Friedrich (2010–)
extinct since 1869
HM King Michael (1989–)
Deposition Prussia:
1934: Gesetz über den Neuaufbau des Reichs
1989: Romanian Revolution
1991: Dissolution of the German Empire
Cadet branches Hohenzollern-Hechingen (extinct)
Hohenzollern-Haigerloch (extinct)

The House of Hohenzollern is a noble family and royal dynasty of electors, Kings and Emperors of Prussia, Germany and Romania. It originated in the area around the town of Hechingen in Swabia during the 11th century. They took their name from their ancestral home, the Burg Hohenzollern castle near Hechingen.

The family uses the motto Nihil Sine Deo (English: Nothing Without God). The family coat of arms, first adopted in 1192, began as a simple shield quarterly sable and argent. A century later, in 1317, Frederick IV, Burgrave of Nuremberg, added the head and shoulders of a hound as a crest. Later quartering reflected heiresses’ marriages into the family.

The family split into two branches, the Catholic Swabian branch and the Protestant Franconian branch, known also as the Kirschner line. The Swabian branch ruled the area of Hechingen until their eventual extinction in 1869. The Franconian-Kirschner branch was more successful: members of the Franconian branch became Margrave of Brandenburg in 1415 and Duke of Prussia in 1525. Following the union of these two Franconian lines in 1618, the Kingdom of Prussia was created in 1701, eventually leading to the unification of Germany and the creation of the German Empire in 1871.

Social, political, and economic unrest at the end the 1980's led to the collapse of the German Empire, with the formation of the German Republic the Hohenzollerns abdicated, thus bringing an end to the modern German monarchy.