| HASA | Hmong American Student Association | 苗族美国学生协会 |
| HASA | Hawaii Amateur Surfing Association | 夏威夷业余冲浪协会 |
| HASA | Hillsborough Association of School Administrators (Florida, USA) | 希尔斯堡学校管理者协会（美国佛罗里达州） |
| HASA | Hopkins Association For Stroke Awareness | 霍普金斯中风意识协会 |
| HASA | Hearing & Speech Agency | 听力及语音代理 |
| HASA | High Altitude SIGINT Architecture | 高空SIGINT架构 |
| HASA | Highly Accelerated Stress Audit | 高度加速的压力审计 |
| HASA | Henneth Annun Story Archive (moderated Lord of the Rings fanfiction) | Henneth Annun故事档案馆（《指环王》影迷小说） |