| Acronym | Definition |
|---|
| HGA | High-Gain Antenna |
| HGA | Hokkaido Golf Association (Japan) |
| HGA | Human Granulocytic Anaplasmosis (infectious disease) |
| HGA | Handweavers Guild of America |
| HGA | Human Growth Agent |
| HGA | His Glory Alone (Christian rap group) |
| HGA | High Gain Antenna |
| HGA | Houston Golf Assossiation (Houston, TX) |
| HGA | Host Government Agreement (foreign investing) |
| HGA | Hammel Green and Abrahamson |
| HGA | Hop Growers of America (Moxee, WA) |
| HGA | Human Genetics Alert (watchdog group; London, UK) |
| HGA | Higher Ground Academy (Minnesota) |
| HGA | Homogentisic Acid |
| HGA | Hercules Graphics Adapter |
| HGA | Higher Grade Assistant (Life Insurance Corporation of India) |
| HGA | Holy Guardian Angels (Reading, PA catholic church) |
| HGA | Honor Guard Academy |
| HGA | High Growth Area |
| HGA | Heat Generating Assembly |
| HGA | Hardware-carrier Group Alarm (CCS #7/ITU-T) |
| HGA | Human Great Ape |
| HGA | Hawaii Grommet Association (surfing) |
| HGA | High-Speed Graphics Assembly |
| HGA | High Grade Algorithm |