| Abbreviation | Definition |
|---|---|
| HCJ | Huntington County Jail |
| HCLA | Hamilton County Leadership Academy |
| HCLA | Harris County Leadership Academy |
| HCLA | Howard County Literacy Association |
| HCLS | Hall County Library System |
| HCLS | Henderson County Livestock Show |
| HCLS | Henry County Library System |
| HCLS | Hidalgo County Library System |
| HCLS | Howard County Library System |
| HCMA | Hartford County Medical Association |
| HCMA | Hillsborough County Medical Association |
| HCMC | Habersham County Medical Center |
| HCMN | Hays County Master Naturalists |
| HCMS | Hancock County Middle School |
| HCMS | Honolulu County Medical Society |
| HCN | Home Counties North |
| HCOC | Healthy Carolinians of Orange County |
| HCOC | History Center of Olmsted County |
| HCPA | Hillsborough County Property Appraiser |
| HCPAC | Henry County Performing Arts Center (McDonough, GA) |