Iosif Papp-Szilágyi de Illyésfalva (Romanian: Iosif Pop Sliaghi de Illyésfalva; 13 April 1813–5 August 1873) was the Bishop of the Diocese of Oradea Mare of the Romanian Greek-Catholic Church from 1863 to 1872.
He participated in the First Vatican Council.He was born into the Szilágyi noble family.