János Ghyczy de Ghicz, Assakürt et Ablánczkürt (c. 1520 – 7 January 1589)[1] was a Hungarian noble in the Principality of Transylvania, member of the Royal Council, who served as Governor of Transylvania for the underage voivode then prince Sigismund Báthory from 1 May 1585 to 17 December 1588.
Two years later he moved to Érsekújvár (today: Nové Zámky, Slovakia) serving besides his brother, György and held the officiolatus of within the Archdiocese of Esztergom.
During the Diet of Spring 1587, the cousin of the young prince, Stephen Báthory de Somlyó intended to overthrow Ghyczy and take control of the country.
However, the Ottoman Porte prevented the coup d'état of Báthory and confirmed Ghyczy in his position.
He resigned due to illness in the Diet of Medgyes (today: Mediaș, Romania) in December 1588.