Hohenzollern consisted of a single district, the Regierungsbezirk Sigmaringen; the capital was Sigmaringen. The last census recorded 74,151 inhabitants in 1939. 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 Kreise.
After regional reforms in 1973 the Hohenzollern borders were finally eliminated, with the region now belonging to the districts of Sigmaringen and Zollernalbkreis, which also contain land that was not previously Hohenzollern territory.