Oy
- Alternate names: Huei, Oi
- Scriptures published: None
- Literacy: No information available.
- Primary country: Lao People's Democratic Republic (Laos)
- Region: Attopeu Province, at the foot of Bolaven plateau, and near Pakse
- Religion: Traditional religion
- Number of users: 11,200
(data from Ethnologue and other sources)