HBSCA
| Acronym | Definition |
|---|---|
| HBSCA | Houston-Baku Sister Cities Association (Houston, TX) |
| HBSCA | Humber Bay Shores Condominium Association (est. 1997; Toronto, Ontario, Canada) |
| HBSCA | Harvard Business School Club of Atlanta (Georgia) |
| HBSCA | Hermosa Beach Sister City Association |