John I, Duke of Opava

John I of Opava (also known as John of Fulnek, Czech: Hanuš z Fulneka, Hanuš Hlubčický, German: Johann I. von Troppau-Leobschütz; c. 1420 – 1454) was a member of the Opava branch of the Bohemian Přemyslid dynasty. He was co-ruler of Opava and Głubczyce from his father's death (between 1445 and 1447) and his own death. He was also Lord of Fulnek.