Wenceslaus III Adam, Duke of Cieszyn (d. 1579)
Wenceslaus III Adam of Cieszyn (Czech: Václav III. Adam, German: Wenzel III. Adam, Polish: Wacław III Adam; December 1524 – 4 November 1579) was a Duke of Cieszyn from 1528 until his death.

He was the second but only surviving son of Wenceslaus II, co-Duke of Cieszyn, by his wife Anna, daughter of Frederick I, Margrave of Brandenburg-Ansbach. He was born one month after his father's death, on 17 November 1524.