| Native Name: | Bistum Naumburg-Zeitz (German) |
| Conventional Long Name: | Prince-Bishopric of Naumburg-Zeitz |
| Common Name: | Naumberg-Zeitz |
| Era: | Middle Ages, Early Modern Period |
| Status: | Prince-Bishopric of the Holy Roman Empire |
| Empire: | Holy Roman Empire |
| Government Type: | Prince Bishopric |
| Date Start: | January 2, |
| Year Start: | 968 |
| Year End: | 1615 |
| S1: | Electorate of Saxony |
| Flag S1: | Flag of Electoral Saxony.svg |
| Coat Alt: | Coat of arms of the Prince-Bishopric of Naumburg |
| Image Map Caption: | The Prince-Bishopric of Naumburg around 1250 |
| Religion: |
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| Title Leader: | Bishop of Naumburg |
| Today: | Germany |
The Prince-Bishopric of Naumburg-Zeitz (German: Bistum Naumburg-Zeitz; Latin: Citizensis, then Latin: Naumburgensis or Latin: Nuemburgensis) was a medieval diocese in the central German area between Leipzig in the east and Erfurt in the west. The seat of the bishop was Zeitz Cathedral in Zeitz from 968 and 1029 and Naumburg Cathedral in Naumburg between 1029 and 1615. It was dissolved in the wake of the Reformation. 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.
John of Neumarkt was bishop-elect in opposition to Rudolf in 1352–1353.