Konstanty Iwanowicz Ostrogski was a Ruthenian prince and magnate of the Grand Duchy of Lithuania. He later had the title of grand hetman of Lithuania from 11 September 1497 until his death in 1530.
- Occupation
- diplomat, politician, military leader
- Position held
- Great Hetman of Lithuania, Castellan of Vilnius, Voivode of Trakai, Great Hetman of Lithuania
- Citizenship
- Grand Duchy of Lithuania
- Born
- 1460
- Died
- September 11, 1530, August 1530
