Konstantin Ostrogski
Konstantin Ostrogski is the name of the following people:
- Kostjantin Ostrogski (around 1460–1530), Ruthenian magnate in Lithuania, see Konstantin Iwanowitsch Ostroschski
- Kostjantin Ostrogski (1524 / 1526–1608), Ruthenian magnate in Poland, see Konstanty Wasyl Ostrogski