| Abbreviation | Definition |
|---|---|
| CATA | Canadian Air Transportation Administration |
| CATA | Central Arkansas Transit Authority |
| CATA | Crawford Area Transit Authority |
| CAZ | Communications Authority of Zambia |
| CBA | Chicago Bagel Authority |
| CBASC | Consolidated Balancing Authority Steering Committee |
| CBDA | California Bay Delta Authority |
| CBPA | Central Bradford Progress Authority |
| CCA | Cannabis Control Authority |
| CCCTA | Contra Costa County Transit Authority |
| CDDA | Cosmetics Devices and Drugs Authority |
| CDRA | County Development Review Authority |
| CEA | CA Earthquake Authority |
| CECMED | Centro para el Control Estatal de Medicamentos, Equipos y Dispositivos Médicos |
| CEDA | Choctaw Economic Development Authority |
| CEGA | Central Electricity Generating Authority |
| CETA | Colorado Electric Transmission Authority |
| CEZA | Cagayan Export Zone Authority |
| CFA | Commonwealth Financing Authority |
| CGA | Collectible Grading Authority |