| Acronym | Meaning |
| NMCA | National Mapping Council of Australia |
| NMCA | National Marine Conservation Area |
| NMCA | National Memorial Cemetery of Arizona (Phoenix, AZ) |
| NMCA | National Meteorological Center Analysis |
| NMCA | National Military Command Authority |
| NMCA | National Motor Carrier Administration |
| NMCA | National Motor Carrier Advisory |
| NMCA | NATO Multirole Combat Aircraft |
| NMCA | New Mexico Court of Appeals |
| NMCA | Norwegian Medicines Control Agency |
| NMCA | Not Mission Capable Airworthy |