| Abbreviation | Definition |
|---|---|
| HCAP | Harris County Aquatic Program |
| HCAP | Harris County Aquatics Program |
| HCAS | Hancock County Animal Shelter |
| HCAS | Hillsborough County Animal Services |
| HCBBP | Horry County Breastfeeding Bag Project |
| HCBE | Hastings County Board of Education |
| HCBW | Home Counties Boxer Welfare |
| HCCC | Hampshire County Cricket Club |
| HCCC | Houston County Community Corrections |
| HCCC | Hudson County Community College |
| HCCF | Hardeman County Correctional Facility |
| HCCF | Hudson County Correctional Facility |
| HCCHC | Hardeman County Community Health Center |
| HCCP | Howard County Collaborative Professionals |
| HCDC | Hamilton County Development Company |
| HCDC | Hardin County Detention Center |
| HCDC | Hillsborough County Developmental Center |
| HCDC | Hudson County Department of Corrections |
| HCDC | Hunterdon County Democratic Committee |
| HCDC | Huron County Development Council |