Karl von Hohenzollern
- Carol of Romania (disambiguation)
- Charles II, Count of Hohenzollern-Sigmaringen
- Karl Anton von Hohenzollern (disambiguation)
- Karl Anton, Prince of Hohenzollern (1811–1885)
- Karl Friedrich von Hohenzollern
- Karl Friedrich, Prince of Hohenzollern-Sigmaringen
- Karl I, Count of Hohenzollern
- Karl, Count of Hohenzollern-Haigerloch
- Karl, Prince of Hohenzollern-Sigmaringen
- Prince Karl Anton of Hohenzollern (1868–1919)
- Roman Catholic Diocese of Chełmno