- ADHA stands for American Dental Hygienists’ Association
- ADHA stands for American Drum Horse Association (Chalk Hill, PA)
- ADHA stands for Additional Duty Hour Allowance
- ADHA stands for Australian Department of Health and Aging
- ADHA stands for Automatic Data Historical Archive (virtual data management)
- ADHA stands for Airdrop Hazard Area (US DoD)
- ADHA stands for Arabians of the Desert Horse Association (equestrian club; California)
ADHA