| Duke Frederick of Saxe-Weimar | |
|---|---|
 | |
| Born | 1 March 1596 Altenburg |
| Died | 29 August 1622 (aged 26) Fleurus, Belgium |
| House | House of Wettin |
| Father | John II, Duke of Saxe-Weimar |
| Mother | Dorothea Maria of Anhalt |
Duke Frederick of Saxe-Weimar (1 March 1596 in Altenburg – 29 August 1622 in Fleurus, Belgium) was a prince from the Ernestine branch of the House of Wettin and a Colonel in the Thirty Years' War.