NHHA
| Acronym | Definition |
|---|---|
| NHHA | New Hampshire Hospital Association (Concord, NH) |
| NHHA | National Heavy and Highway Alliance (unions) |
| NHHA | North Harbour Hockey Association (North Harbour, New Zealand) |
| NHHA | Nottingham Help the Homeless Association (Nottingham, East Midlands, England, UK) |
| NHHA | Northwood Hills Homeowners Association, Inc. (Dallas, TX) |
| NHHA | New Haven Housing Authority |