Adam Wenceslaus of Cieszyn (Polish: Adam Wacław cieszyński, Czech: Adam Václav Těšínský, German: Adam Wenzel von Teschen; 12 December 1574 – 13 July 1617), was a Duke of Cieszyn from 1579 until his death. He was the second but only surviving son of Wenceslaus III Adam, Duke of Cieszyn, by his second wife Sidonia Katharina, daughter of Francis I, Duke of Saxe-Lauenburg. His older half-brother, Frederick Casimir, only son of Wenceslaus III Adam's first marriage, died a few years before he was born, in 1571.