Orosius (Paulus Orosius, b. , d. 418?) was a Christian historian, theologian and student of Augustine of Hippo from Gallaecia.

Orosius may also refer to: Orosius (leafhopper), a bug genus in the family Cicadellidae Bobbio Orosius, an early 7th-century manuscript of the Chronicon by Paulus Orosius

See also List of Roman cognomina