| Acronym | Definition |
|---|
| HHSA➣Health and Human Services Agency (California) |
| HHSA➣Herrington Harbour Sailing Association (est. 1981; Herring Bay, MD) |
| HHSA➣Handicapped Housing Society of Alberta (Alberta, Canada) |
| HHSA➣Hospital and Health Services Administration (university curriculum) |
| HHSA➣HoofBeats Horse Show Association |
| HHSA➣Huron Hockey and Skating Association (East Tawas, MI) |