HADC
| Acronym | Definition |
|---|---|
| HADC | Housing Authority of Dekalb County (Decatur, GA) |
| HADC | Haymarket Affair Digital Collection (Chicago Historical Society) |
| HADC | Holloman Air Development Center |
| HADC | Heart of America Dance Centre (Lees Summit, MO) |
| HADC | Hough Area Development Corporation (est. 1968; Cleveland, OH) |
| HADC | Honorary Aide-de-Camp (French: Honorary Camp Assistant; Canada) |