Prince Wladysław Dominik Zasławski-Ostrogski (ca. 1616 – 1656) was a Polish nobleman (szlachcic) of Ruthenian stock. Prince of The Princely Houses of Poland, Ostroh Ordynat, Grand Koniuszy of The Crown. Zasławski was the mightiest magnate in Volhynia at that time. He was voivode of Sandomierz Voivodship from 1645 and voivode of Krakow Voivodship from 1649. Starosta of Lutsk 1639-1653, regimentarz of the Crown 1648, second richest, after Stanisław Lubomirski, Polish magnate.