County/Principality of Nassau-Saarbrücken-Weilburg
- Simplified country name: Saarbrücken-Weilburg
- Nation: Nassuvian Germany [Walramian line]
- Predecessor: County of Nassau-Ottweiler/Saarbrücken
- Chronology
- 1629: Created as a county upon the partition of the unified Nassau-Saarbrücken
- 1688: Promoted to a principality
- 1806: Terminated upon the demise of the Holy Roman Empire
- Successor: Duchy of Nassau (Napoleonic client)
