The Diocese of Győr (Hungarian: Győri Egyházmegye, German: Bistum Raab, Latin: Dioecesis Iaurinensis) is a diocese of the Latin Church of the Catholic Church in Hungary.

The diocese is suffragan to the Archdiocese of Esztergom-Budapest.

The Cathedral Basilica of Győr is dedicated to Blessed Virgin Mary.

The current bishop is Lajos Pápai, who was appointed in 1991.

The Bishops of Győr were Perpetual Counts of Baranya (Hungarian: Győr vármegye örökös főispánja, Latin: Jaurinensis perpetuus supremus comes) from the 16th century till 1783.