Arius (disambiguation)

Arius was a Christian priest in Alexandria, Egypt in the early fourth century.

Arius may also refer to:


 * Arius (fish), a genus of catfishes
 * Arius Didymus, a citizen of Alexandria
 * Hari River, a river known in Latin as the Arius
 * Podocarpus costalis, species of plants native to the Philippines and Taiwan