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| Joachim Frederick | |
|---|---|
 Joachim Frederick, Elector of Brandenburg, portrait by Johann Bussemacher | |
| Elector of Brandenburg | |
| Reign | 8 January 1598 – 18 July 1608 |
| Predecessor | John George |
| Successor | John Sigismund |
| Born | 27 January 1546 Cölln, Margraviate of Brandenburg, Holy Roman Empire |
| Died | 18 July 1608 (aged 62) Cöpenick, Margraviate of Brandenburg, Holy Roman Empire |
| Burial | |
| Spouse | Catherine of Brandenburg-Küstrin Eleanor of Prussia |
| Issue | John Sigismund, Elector of Brandenburg Anne Catherine, Queen of Denmark and Norway Johann Georg of Brandenburg August of Brandenburg Albert Frederick of Brandenburg Joachim von Brandenburg Ernest of Brandenburg Barbara Sophie, Duchess of Württemberg Christian William of Brandenburg Marie Eleonore, Countess Palatine of Simmern-Kaiserslautern |
| House | Hohenzollern |
| Father | John George, Elector of Brandenburg |
| Mother | Sophie of Legnica |
| Religion | Lutheran |
Joachim Frederick (27 January 1546 – 18 July 1608), of the House of Hohenzollern, was Prince-elector of the Margraviate of Brandenburg from 1598 until his death.