Zbigniew (also known as Zbygniew; c. 1073 – 8 July 1113?), was a duke of Poland (in Greater Poland, Kuyavia and Masovia) during 1102–1107. He was the first-born son of Władysław I Herman and Przecława, possibly a member of the Prawdzic family.
Zbigniew was considered illegitimate, and after the birth of his half-brother Bolesław Wrymouth was destined for the Church. At the end of the 11th century, when real power in the country was held by the Palatine Sieciech, the opposition of some Silesian magnates caused the return of Zbigniew to Poland and forced Władysław I to recognize him as his successor. The intrigues of Sieciech and Władysław I's second wife Judith Maria caused Zbigniew and his younger half-brother to become allies, and both in the end forced their father to divide the country between them and to exile the Palatine.