| NCII | National Center for Inquiry and Improvement 
| Others |
| NCII | National Center for Inquiry Improvement
| Others |
| NCII | National Center on Intensive Intervention
| Others |
| NCII | National Center on Intensive Interventions
| Others |
| NCII | National Council of Individual Investors
| Others |
| NCII | National Counselling Institute of Ireland
| Others |
| NCII | Native Commerce Infrastructure Initiative
| Others |
| NCII | Naval Command and Information Infrastructure
| Others |
| NCII | Ncil Of Churches In India
| Others |
| NCII | Non Consensual Intimate Image
| Others |
| NCII | North Coast Industrial Imaging
| Others |
| NCII | Northeastern Community Investments, Incorporated
| Others |
| NCII | Northern Colorado Intergroup Inc
| Others |
| NCII | Northwest Convention of Intercollegiate Improv
| Others |