Wenceslaus I | |
|---|---|
| Duke of Zator, Oświęcim | |
 Coat-of-arms of Upper Silesia (Opole, Oświęcim, Zator, etc). | |
| Born | c. 1418 |
| Died | before 29 July 1468 |
| Noble family | Silesian Piasts of Opole |
| Spouse(s) | Maria Kopczowska |
| Issue | Casimir II Wenceslaus II Jan V Władysław Sophie Katharina Agnes |
| Father | Casimir I of Oświęcim |
| Mother | Anna of Żagań |
Wenceslaus I of Zator (Polish: Wacław I zatorski; c. 1418 – before 29 July 1468), was a Duke of Oświęcim during 1434–1445 (with his brothers as co-rulers) and Duke of Zator from 1445 until his death.
He was the eldest son of Duke Casimir I of Oświęcim by his first wife Anna, daughter of Duke Henry VIII of Żagań.