| Johanna Magdalene of Saxe-Weissenfels | |
|---|---|
| Duchess of Courland | |
| Born | 17 March 1708 |
| Died | 25 January 1760 |
| Spouse | Ferdinand Kettler |
| Father | Johann Georg, Duke of Saxe-Weissenfels |
| Mother | Fredericka Elisabeth of Saxe-Eisenach |
Johanna Magdalene of Saxe-Weissenfels (17 March 1708 – 25 January 1760), was a Duchess consort of Courland. She married the Duke of Courland, Ferdinand Kettler, on 20 September 1730. She was the daughter of Johann Georg, Duke of Saxe-Weissenfels and Fredericka Elisabeth of Saxe-Eisenach. The marriage was childless.