Saint Ovidius (Portuguese: Santo Ovídio), also Saint Auditus, is a Portuguese saint. According to hagiographies of the 16th century, Ovidius was a Roman citizen of Sicilian origin.

Tradition states that he was sent to Braga by Pope Clement I, where he served as the city’s third bishop around 95 AD. He is said to have baptized Saint Marina and her sisters after they were abandoned by their mother.