John, Duke of Ścinawa

John of Ścinawa (c. 1298–before 19 May 1365) was a Silesian Piast, the fourth son of Henry III, Duke of Głogów. After his father's death he ruled with his brothers, receiving Ścinawa and neighbouring lands as his duchy in 1317. In 1329 he paid homage to King John of Bohemia at Wrocław.

Dogged by debts, he sold or pledged parts of his duchy; in 1337 his brothers bought Ścinawa, though he kept sovereignty for life. He married Margaret of Pomerania and died childless by May 1365.