Rotenhan Castle (German: Burg Rotenhan) is a castle ruin about two kilometres north of the village of Eyrichshof in Lower Franconia in the south German state of Bavaria.
The castle is the ancestral home (Stammsitz) of the House of Rotenhan, a family of imperial knights.
In 1229, reference is made to a Winther and Wolfram "de Rotenhagen" in connexion with an allodial holding of the family rather than a fief.
The doorway to the staircase entrance belongs to the late Romanesque-early Gothic period.
In 1323 the castle was besieged by the Bishop of Würzburg, Wolfram Wolfskeel von Grumbach, for a year under the pretext of that the family had been involved in counterfeiting and a breach of feudal loyalty.