Wenceslaus II, Duke of Legnica (1348 – 30 December 1419) was a Duke of Legnica from 1364 (only nominal; from 1409 he reigned alone and personally) until 1413, Bishop of Lebus (1375–82) and Breslau (Wroclaw) (1382–1417; also Duke of Nysa-Otmuchów.
He was the second son of Wenceslaus I of Legnica, by his wife Anna, daughter of Casimir I, Duke of Cieszyn.
Duke Wenceslaus I didn't want to divide the already small Duchy of Legnica between his sons; therefore, he destined Wenceslaus II and his younger brothers Boleslaw IV and Henry VIII to the Church, leaving his oldest son Rupert I as the only and true ruler over Duchy of Legnica. By 1363, Wenceslaus II was appointed as a Canon of the cathedral chapter in Breslau (although he only took formal possession of this post in 1368).
After his father's death in 1364, Wenceslaus II and his brothers were placed under the guardianship of their uncle Ludwik I the Fair and later by his older brother Rupert I. Louis I took a special interest in the spiritual career of his nephew and since 1371, prepared him for the future post of Bishop of Breslau.
Since 1363, Wenceslaus II began his studies in the University of Prague, and in the decade of 1370 he travelled to Montpellier, France, where he obtained a degree in canon law. In 1373, he was chosen as canon of Olomouc.
On 3 December 1375, Wenceslaus II was appointed by Pope Gregory XI as Bishop of Lebus, although by canon law, the legal minimum age for this type of post was thirty years. From the rule of Wenceslaus II in Lebus was known little; only some information was found on Wenceslaus as bishop as to the Synod in Kalisz in 1378, convening the bishops of the suffragans with Lebus' then metropolitan Archdiocese of Gniezno.