| HGSA | Hamilton Girls Softball Association 
| Others |
| HGSA | Harmony Grove Spiritualist Association
| Others |
| HGSA | Helena Girls Softball Association
| Others |
| HGSA | Hellenic Graduate Student Association
| Others |
| HGSA | Henderson Girls Softball Association
| Others |
| HGSA | Hermitage Girls Softball Association
| Others |
| HGSA | Hilliard Girls Softball Association
| Others |
| HGSA | Hilliard Girls' Softball Association
| Others |
| HGSA | History Graduate Student Association
| Others |
| HGSA | History Graduate Students Association
| Others |
| HGSA | History Graduate Students' Association
| Others |
| HGSA | Home Garden Seed Association
| Others |
| HGSA | Host Guardian Services Attestation
| Others |
| HGSA | Hudson Girls Softball Association
| Others |
| HGSA | Human Genetics Society of Australasia
| Others |
| HGSA | Humanities Graduate Student Association
| Others |