| AACCC | Anne Arundel County Chamber of Commerce |
| AACO | Anne Arundel County |
| ABCE | Association of Bay County Educators |
| ABCT | Alliance of Boulder County on Tobacco |
| ACAA | Allegheny County Airport Authority |
| ACAC | Amador County Arts Council |
| ACAC | Allen County Athletic Conference |
| ACAP | Aroostook County Action Program |
| ACBC | Addiction Center of Broome County |
| ACCA | Auglaize County Council on Aging |
| ACCAT | Adams County Cancer Awareness Team |
| ACCB | Allamakee County Conservation Board |
| ACCB | Audubon County Conservation Board |
| ACCC | Adams County Correctional Center |
| ACCE | American City County Exchange |
| ACCFC | Anoka County Children and Family Council |
| ACCR | Allegheny County Coalition for Recovery |
| ACCW | Alexander County Championship Wrestling |
| ACDA | Allegheny County District Attorney |
| ACDS | Alameda County Dental Society |