| NCHA | National Campers and Hikers Association 
| Others |
| NCHA | National Capital Housing Authority
| Others |
| NCHA | National College Health Assessment
| Others |
| NCHA | National Collegiate Hockey Association
| Others |
| NCHA | National Committee for the History of Art
| Others |
| NCHA | National Country Ham Association
| Others |
| NCHA | National Cutting Horse Association
| Others |
| NCHA | North Carolina Honors Association
| Others |
| NCHA | Northern California Handball Association
| Others |
| NCHA | Northern Collegiate Hockey Association
| Others |
| NCHA | Northern Colorado Homeschool Association
| Others |
| NCHA | Nottingham Community Housing Association
| Others |