ONCC
| Acronym | Definition |
|---|---|
| ONCC | Oncology Nursing Certification Corporation |
| ONCC | Office of the National Culture Commission (Thailand) |
| ONCC | OFWAT (Office of Water Services) National Customer Council |
| ONCC | Official Nelson Commemorations Committee (Nelson's Island, Egypt) |
| ONCC | Opera Nazionale Ciechi Civili (Italian: National Opera Association for the Blind) |
| ONCC | Office of Water Services National Consumer Council (United Kingdom) |