The Prince-Bishopric of Naumburg-Zeitz (German: Bistum Naumburg-Zeitz; Latin: Citizensis, then Naumburgensis[1] or Nuemburgensis)[2] was a medieval diocese in the central German area between Leipzig in the east and Erfurt in the west.

The Bishopric of Zeitz-Naumburg encompassed the four archdeaconries of Naumburg, Zeitz, Altenburg and "trans Muldam" (comprising the sub-districts (Unterbezirke) of Lichtenstein, Glauchau, Hartenstein and Lößnitz).

The diocese of Zeitz was founded on January 2, AD 968.

Along with Meißen and Merseburg, it had been authorized by Pope John XIII at the Synod of Ravenna the year before, in accordance with a recommendation by Emperor Otto I.

All three bishoprics were suffragans of the Archbishopric of Magdeburg.