Saxe-Jena

 ( 1672 Establishments In The Holy Roman Empire ) 

The Duchy of Saxe-Jena was one of the Saxon Duchies held by the Ernestine line of the Wettin Dynasty. Established in 1672 for Bernhard, fourth son of Wilhelm, Duke of Saxe-Weimar, Saxe-Jena was reincorporated into Saxe-Weimar on the extinction of Bernhard's line in 1690.

• Bernhard II (1672–1678)
• Johann Wilhelm (1678–1690)