Dobiesław Oleśnicki (Dobiesław of Oleśnica) was a soldier, aristocrat and politician in 15th century Poland. Born in Sienno into the Dębno family, he was castellan of Wojnicki (1411–1433), Lublin (1433) and Sandomierz (1435); starosta of Kraków (1438); podczaszy of Kraków (1438–1439); and voivode of Sandomierz (1438–1440). He was a participant in the Battle of Grunwald and the commander of the Siege of Marienburg. He built a new castle in Rymanów, founded churches, and was the father of the Sienieńskich family. He was a brother of the Primate of Poland and is described by Maurycy Dzieduszycki as "comparing to lives of the Knights in song and poem".