ACAC or acac may refer to:

• Acetylacetonate (acac), a ligand in coordination chemistry derived from acetylacetone
• ACAC consortium, a subsidiary of China Aviation Industry Corporation
• Alberta Colleges Athletics Conference, the governing body for collegiate sports in Alberta, Canada
• Amador County Arts Council, the official Amador County, US arts council
• Allen County Athletic Conference, High School conference in Indiana, US
• Atlanta Contemporary Art Center, a contemporary art museum in Atlanta