Oros of Alexandria was a 5th-century CE grammarian. He is known solely through the 10th-century Byzantine encyclopedia, the Suda, which identifies him as a grammarian but records no further biographical details.

The Suda attributes three lost grammatical treatises to him: On Orthography, On Attic Accentuation, and On Quantity. These works survive only as fragments or cited titles.

Oros represents the continuation of technical philological studies in Late Antique Alexandria. His focus on orthography, Attic accentuation, and syllable quantity reflects core concerns of contemporary education and scholarship. His inclusion in the Suda indicates his works were consulted by later Byzantine grammarians, though his direct influence remains minor.