| Acronym | Definition |
|---|
| HAAC | Heart of America Athletic Conference |
| HAAC | Holland Area Arts Council (Holland, MI) |
| HAAC | Hockey Altercation Action Camp (San Diego Ice Arena developmental hockey class) |
| HAAC | Hispanic Alliance of Atlantic County |
| HAAC | Hispanic Access Advisory Council |
| HAAC | Halton Agricultural Advisory Committee |
| HAAC | Harbour Authority Advisory Council |
| HAAC | HRSA AIDS Advisory Committee |
| HAAC | High Authority for Audiovisual Communications |
| HAAC | Helicopter Air to Air Combat |
| HAAC | High Altitude Athletics Club |
| HAAC | Hungarian American Athletic Club |
| HAAC | Hamilton Applied Astrophysics Club |