| CIRCA | Canadian Industries Recycling Coal Ash 
| Others |
| CIRCA | Center for Initiatives and Research on Climate Adaptation
| Others |
| CIRCA | Center For Instructional And Research Computing Activities
| Others |
| CIRCA | Clandestine Insurgent Rebel Clown Army
| Others |
| CIRCA | Communication And Information Resource Centre Administrator
| Others |
| CIRCA | Communication Information Resource Centre Administrator
| Others |
| CIRCA | Conceptual Information Retrieval And Communication Architecture
| Others |
| CIRCA | Connecticut Institute for Resilience and Climate Adaptation
| Others |
| CIRCA | Connecticut Institute for Resilience Climate Adaptation
| Others |
| CIRCA | Contents Insurance Residential Cost Address
| Others |