Hohenzollern (Hohenzollernsche Lande in German) was a province of the Kingdom of Prussia. It was created in 1850 by joining the principalities of Hohenzollern-Sigmaringen and Hohenzollern-Hechingen after both formerly independent states had been annexed by Prussia, ruled by the protestant branch of the House of Hohenzollern.

Hohenzollern consisted of a single district, the Regierungsbezirk Sigmaringen. The last census in 1939 resulted 74,000 inhabitants; the capital was Sigmaringen. While Hohenzollern enjoyed all the rights of a full-fledged province of Prussia, including representation in the Prussian parliament, its military matters were governed by the Rhine Province. The Regierungsbezirk Sigmaringen was further subdivided into seven Oberamtsbezirke, although only four of these remained by 1925, when they were merged and re-divided as two new Kreisen.

In 1946, the French military administration made it a part of the state of Württemberg-Hohenzollern. Hohenzollern has been part of the German federal state of Baden-Württemberg since 1952.

After regional reforms in 1973 the Hohenzollern borders were finally eliminated, with the region now belonging to the districts of Sigmaringen und Zollernalbkreis, which also contain land that was not previously Hohenzollern territory.

Image:Flag of Preussen 1701-1918.jpg Provinces of Prussia

Kingdom of Prussia	1740: Silesia 1773: East Prussia \| West Prussia \| Netze District 1793: South Prussia 1795: New East Prussia \| New Silesia 1815: Brandenburg \| Jülich-Cleves-Berg \| Lower Rhine \| Pomerania \| Posen \| Saxony \| Westphalia 1822: Rhine Province 1829: Prussia 1850: Hohenzollern 1867: Hanover \| Hesse-Nassau \| Schleswig-Holstein
Free State of Prussia	1919: Lower Silesia \| Upper Silesia 1920: Berlin 1922: Posen-West Prussia