Jan Kostka was a Polish noble and a candidate in elections for the new King of Poland in 1572. He was also an advisor to Kings Henry of Valois and Stefan Batory.
- Occupation
- beamter, castellan
- Position held
- Q11820686, Q9251875, Sandomierz voivode, king's secretary at the Polish court
- Citizenship
- Polish–Lithuanian Commonwealth
- Born