Wikipedia
HIAA
HIAA may refer to:
- Health Insurance Association of America
- Halifax International Airport Authority, a Canadian airport authority charged with operating Halifax Stanfield International Airport on behalf of Transport Canada
- 5-Hydroxyindoleacetic acid (5-HIAA), a metabolite of serotonin used to diagnose carcinoid tumors
- HIAA (AM), a radio station using frequency 560 AM, in Santiago, Dominican Republic