Look up onia in Wiktionary, the free dictionary.
Onia may refer to:
- Plural of onium, a bound state of a particle and its antiparticle
- Onia, Arkansas, an unincorporated community in Stone County, Arkansas
- Onia (clothing), a New York City based clothing company
See also
edit- Onias (disambiguation)
- Oneia Mountains, pronounced /'onia/ in Modern Greek