NIOC
| Acronym | Definition |
|---|---|
| NIOC | National Iranian Oil Company |
| NIOC | Navy Information Operations Command (US Navy) |
| NIOC | Naval Information Operations Command (US Navy) |
| NIOC | Negril Interval Ownership Club (Negril, Jamaica) |
| NIOC | Northern Illinois Orienteering Club |
| NIOC | Network Inter-Operability Committee |
| NIOC | Northern Illlinois Offshore Club |