Ursus (Italian: Orso, died 13 April 396) was bishop of Ravenna during the late 4th century who is venerated as a saint in the Eastern Orthodox Church and Roman Catholic church, with his feast day being commemorated on 13 April.

[2] He was elected bishop following the death of Liberius III and held the position for 26 years.

[3] He is best known as the founder of the Ravenna Cathedral, which was named Basilica Ursiana in his honor.

[4] According to Andreas Agnellus, he died on 13 April on Easter Sunday, and he was buried at the Basilica Ursiana.

[3] The dates of Ursus's tenure as bishop are a subject of some dispute.