| Abbreviation | Definition |
|---|---|
| HTA | Horticultural Trades Association |
| HTAC | Healing Touch Association of Canada |
| HTCA | Harding Township Civic Association |
| HTCA | Huntington Terrace Citizens Association |
| HTEA | Holmdel Township Education Association |
| HTIA | Healing Tao Instructors Association |
| HTIA | High Tech Industry Association |
| HTMA | Highways Term Maintenance Association |
| HTMA | Houston Treasury Management Association |
| HTTA | Hills Table Tennis Association |
| HTTA | Hungarian Table Tennis Association |
| HTWA | Historic Third Ward Association |
| HUGA | Halifax Urban Greenway Association |
| HULA | Hawaii Ultimate League Association |
| HULA | Hawaii Urantia Local Association |
| HULL | Hrvatska udruga leukemija i limfomi (in Croatian) Association of Leukemia and Lymphoma |
| HURA | Harvard University Retirees Association |
| HURA | Hawkeye Undergraduate Research Association |
| HUSA | Hamline University Staff Association |
| HUSA | Hmong United Student Association |