| Acronym | Definition |
|---|
| DDHA | Duration of Daily Heroin Abuse |
| DDHA | Delaware Dental Hygienists’ Association |
| DDHA | Det Danske Harmonika Akademi (Danish: Danish Harmonica Academy) |
| DDHA | Developmental Disabilities Health Alliance (est. 1997; New Jersey) |
| DDHA | Doncaster and District Heritage Association (UK) |
| DDHA | Danish District Heating Association (heating company member organization) |
| DDHA | Dimeric Distamycin Linked Hydroxamic Acid |
| DDHA | Delhi District Hockey Association (India) |
| DDHA | Duke-Durham Hunger Alliance (Duke University; Durham, NC) |
| DDHA | Dentin-Derived Hydroxyapatite |
| DDHA | Dallas Dream Horse Academy (Dallas, TX) |
| DDHA | Detailed Design Hazard Analysis |