Ernst Magnus von Dönhoff was a Baltic German who served the Polish–Lithuanian Commonwealth in Livonia and the Polish fief of Duchy of Prussia, and in the Swedish army during the Thirty Years' War. He was born a member of the Dönhoff family, a noble family of Prussian origin.
- Occupation
- politician, voivode, mayor, starosta
- Position held
- mayor, Pärnu voivode, Q3918156, Polish elector
- Citizenship
- Polish–Lithuanian Commonwealth
- Born
- December 10, 1581
- Died
- June 18, 1642
