NIAA
| Acronym | Definition |
|---|---|
| NIAA | National Institute of Animal Agriculture |
| NIAA | National Institute of Accountants, Australia |
| NIAA | National Indian Athletic Association |
| NIAA | Northern Ireland Association of Aeromodellers |
| NIAA | Nevada Interscholastic Athletics Association |
| NIAA | National Industrial Advertisers Association |
| NIAA | Northern Independent Athletic Association (Columbus, OH) |