| Abbreviation | Definition |
|---|---|
| CIRA | Comprehensive Immigration Reform Act |
| CIRC | Colorado Immigrant Rights Coalition |
| CIRI | Connecticut Institute for Refugees and Immigrants |
| CIS | Cabrini Immigrant Services |
| CIS | Citizenship and Immigration Services |
| CIS | Citizenship Immigration Services |
| CISSA | Canadian Immigrant Settlement Sector Alliance |
| CIVIC | Community Initiatives for Visiting Immigrants in Confinement |
| CIWA | California Immigrant Workers Association |
| CIWC | California Immigrant Welfare Collaborative |
| CLARS | Common Language Assessment and Referral System |
| CLB | Canadian Language Benchmarks |
| CLIC | Cours de langue pour les immigrants au Canada |
| CLINIC | Catholic Legal Immigration Network Inc CLINIC |
| CNIA | Canada Newcomers Immigration Association |
| COA | Canadian Orientation Abroad |
| CPOW | Centralized Processing Office - Winnipeg |
| CRIS | Community Refugee and Immigration Services |
| CSII | Center for the Study of Immigrant Integration |
| CSIO | Center to Support Immigrant Organizing |