Constance of Austria (also known as Constance Renate of the Habsburgs, in Polish as Konstancja Austriaczka or Konstancja Rakuszanka) (1588-1631) was the daughter of Archduke Charles II of Austria. grandfather was Ferdinand I of the Holy Roman Empire and her brother was the emperor Ferdinand II.

Constance's sister Anna of Austria was the first wife of Wasa king Sigismund III of Poland and Sweden. After her death Constance and Sigismund III Wasa were married on December 11, 1605. They had seven children:

1. Johan Kasimir (1607-1608)
2. John Casimir (1609-1672), (reigned 1648-1668 as John Casimir II Vasa of Poland)
3. Johan Albert (1612-1634)
4. Karl Ferdinand (1613-1655)
5. Alexander Karl (1614-1634)
6. Anna Konstantia (1616-1616)
7. Anna Katharina Konstanze (1619-1651)