Bernhard Erdmannsdörffer (24 January 1833 in Altenburg – 1 March 1901 in Heidelberg) was a German historian. He was the father of mineralogist Otto Erdmannsdörffer. From 1852 he studied classical philology and history at the University of Jena, subsequently receiving his doctorate under the sponsorship of Johann Gustav Droysen. After conducting research in Italy, he relocated to Berlin in 1861, and collaborated with Droysen and Maximilian Wolfgang Duncker on a massive work involving Frederick William, Elector of Brandenburg, "Urkunden und Actenstücke zur Geschichte des Kurfürsten Friedrich Wilhelm von Brandenburg", a project that ultimately grew to 23 volumes, only being finished in 1930.