| Acronym | Definition |
|---|
| HTPA | Harbor Teacher Preparation Academy (Wilmington, CA) |
| HTPA | Hydro Turf Planters Association |
| HTPA | Houston Transportation Professionals Association (Houston, TX) |
| HTPA | Human Tissue Plasminogen Activator |
| HTPA | High Temperature Polyamides |
| HTPA | Health Technology Policy Analysis |
| HTPA | Healing Touch Practitioner Apprentice |
| HTPA | Hearing Technology Predisposition Assessment |
| HTPA | Hypothalamic-Pituitary Axis |
| HTPA | Holy Trinity Parents Association |
| HTPA | Heritage Tree Preservation Act (California) |
| HTPA | Hardwood Trees Per Acre |
| HTPA | Hoelting Team Player Award (Division of Housing and Food Service; University of Texas) |
| HTPA | Heart Patch |