| Acronym | Definition |
|---|
| HGSA➣History Graduate Student Association (various schools) |
| HGSA➣Human Genetics Society of Australasia |
| HGSA➣Hospital Geral de Santo António (Porto, Portugal) |
| HGSA➣Holmer Green Sports Association (UK) |
| HGSA➣Hamilton Girls Softball Association (est. 1992; Mercerville, NJ) |
| HGSA➣Henderson Girls Softball Association (Nevada) |