Wenceslaus III Adam | |
|---|---|
| Duke of Cieszyn | |
 Wenceslaus III Adam | |
| Born | December 1524 |
| Died | 4 November 1579 |
| Noble family | Silesian Piasts |
| Spouse(s) | Maria of Pernstein Catharina of Saxe-Lauenburg |
| Issue | Frederick Casimir of Cieszyn Christian August Anna Sibylla Adam Wenceslaus, Duke of Cieszyn |
| Father | Wenceslaus II, Duke of Cieszyn |
| Mother | Anna of Brandenburg-Ansbach |
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.