- ACIO stands for Association Canadienne des Infirmieres en Oncologie (French: Canadian Association of Nurses in Oncology)
- ACIO stands for Australian Commerce and Industry Office
- ACIO stands for Advanced Contact Intelligence Organization
- ACIO stands for Associate Chief Information Officer (corporate title)
- ACIO stands for Army Careers Information Office
- ACIO stands for Advertising Career Information Office
- ACIO stands for Alien Contact Intelligence Organisation
- ACIO stands for Air Combat Intelligence Office
- ACIO stands for Aviation Certification and Interoperability Office
- ACIO stands for Activity Chief Information Officer
- ACIO stands for Aeronautical Chart and Information Office
- ACIO stands for Assistant Central Intelligence Officer
ACIO