- CAC stands for Combined Arms Center (Ft Leavenworth, Kansas)
- CAC stands for Citizens’ Advisory Committee
- CAC stands for Capital Athletic Conference
- CAC stands for Call Admission Control
- CAC stands for Child Advocacy Center
- CAC stands for Central Arizona College
- CAC stands for Creative Arts Center (West Virginia University)
- CAC stands for Common Access Card (US DoD smart card technology)
- CAC stands for Citizens Advisory Council
- CAC stands for Certified Acceptance Corporation (est. 2007)
- CAC stands for Create A Card (online gaming)
- CAC stands for Coaching Association of Canada
- CAC stands for Coronary Artery Calcium
- CAC stands for Connection Admission Control (Asynchronous Transfer Mode)
- CAC stands for Center for Advanced Computing (est. 2001; College of Engineering; University of Michigan; Ann Arbor, MI)
- CAC stands for Contemporary Arts Center (various locations)
- CAC stands for Community Action Council
- CAC stands for California Arts Council
- CAC stands for Codex Alimentarius Commission
- CAC stands for Clean Air Campaign (Atlanta, GA)