Erdmann II, Count von Promnitz (born 22 August 1683 in Sorau, Electorate of Saxony (now Zary, Poland); died: 7 September 1745 at the forest castle near Zary) was Lord of Zary (German: Sorau) and Trzebiel (German: Triebel) in Lower Lusatia, and Pszczyna (German: Pless) in Upper Silesia.
He served Augustus II the Strong, elector of Saxony and king of Poland, and later his son and successor Augustus III as Privy Councillor and as cabinet minister.
In 1703, Erdmann II inherited his father's vast estates.
He administered this estate himself.
Erdmann von Promnitz brought Georg Philipp Telemann and Wolfgang Caspar Printz as Kapellmeister to his court in Zary.