Henry Casimir I of Nassau-Dietz
| Henry Casimir I | |
|---|---|
Portrait by Wybrand de Geest, c. 1632 | |
| Count of Nassau-Dietz | |
| Period | 2 June 1631 – 13 July 1640 |
| Predecessor | Ernst Casimir |
| Successor | Willem Frederik |
| Stadtholder of Friesland | |
| Reign | 2 June 1632 – 13 July 1640 |
| Predecessor | Ernst Casimir |
| Successor | Willem Frederik |
| Stadtholder of Drenthe and Groningen | |
| Reign | 2 June 1632 – 13 July 1640 |
| Predecessor | Ernest Casimir |
| Successor | Frederick Henry |
| Born | 21 January 1612 Arnhem, Dutch Republic |
| Died | 13 July 1640 (aged 28) Hulst, Dutch Republic |
| Burial | |
| Father | Ernst Casimir of Nassau-Dietz |
| Mother | |
Henry Casimir I of Nassau-Dietz (21 January 1612 – 13 July 1640) was count of Nassau-Dietz and Stadtholder of Friesland, Groningen and Drenthe.