| Acronym | Definition |
|---|
| NCAO➣Northern California Area Office (US DOI) |
| NCAO➣Nepalese Canadian Association of Ottawa (Canada) |
| NCAO➣North Carolina Airsoft Organization |
| NCAO➣New Covenant Apostolic Order |
| NCAO➣National Catholic AIDS Office (Australia) |
| NCAO➣National Cemetery Area Office (US National Cemetery System) |