John II Casimir Vasa was King of Poland and Grand Duke of Lithuania from 1648 to his abdication in 1668 as well as a claimant to the throne of Sweden from 1648 to 1660. He was the first son of Sigismund III Vasa with his second wife Constance of Austria. John Casimir succeeded his older half-brother, Władysław IV Vasa.
- Occupation
- Catholic priest, monarch
- Position held
- King of Poland, Commendatory abbot
- Citizenship
- Grand Duchy of Lithuania, Polish–Lithuanian Commonwealth
- Born
- March 22, 1609, March 21, 1609
- Died
