The Diocese of Andria (Latin: Dioecesis Andriensis) is a Latin diocese of the Catholic Church in Apulia, seated at Andria Cathedral which is built over a church dedicated to St. Peter, about ten miles southwest of Trani.

[2][3] Tradition assigns the Christian origin of Andria to an Englishman, St. Richard, chosen as bishop by Pope Gelasius I, about 492 AD.

[6] The diocese dates probably back to the time of Gelasius II, elected Pope in 1118.

The earliest known bishop of Andria, whose name is not preserved, took part in the translation of the body of Saint Nicholas the Pilgrim in Trani in 1143.

[7] Bishop Richard of Andria was present at the Eleventh Ecumenical Council (Third Lateran, 1179) held under Pope Alexander III.