Arius (disambiguation)
# 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
