NAIA
| Acronym | Definition |
|---|---|
| NAIA | National Association of Intercollegiate Athletics |
| NAIA | Ninoy Aquino International Airport (Metro Manila, Philippines) |
| NAIA | National Animal Interest Alliance (animal welfare organization) |
| NAIA | National Association of Independent Artists |
| NAIA | National Abandoned Infants Assistance |
| NAIA | National Alliance for Information Assurance |
| NAIA | Northern Alabama Investigator's Association |