leon, CA:
* Air China, IATA airline designator (CA)
* Bureau of Consular Affairs, a division of the US Department of State
* CA, Inc. (formerly known as Computer Associates)
* Canadian Academy, an international school in Kobe, Japan
* Canadian Alliance, a former Canadian political party
* C&A stores
* Carmelo Anthony, NBA player
* Cary Academy, a North Carolina school
* Catamarca, a province in Argentina
* Cayman Airways, airline
* Central Administration
* Certified archivist
* Channel America, a defunct US television network
* Chartered accountant (CA)
* Chief of Army (Australia)
* Christian anarchist, an adherent of Christian anarchism
* Christina Aguilera, singer and songwriter
* Citizens' Alliance, a political party in Trinidad and Tobago
* Civil Affairs, the official name for military units that conduct civil-military operations
* Classic Army, a Hong Kong based manufacturer of airsoft replicas
* Cocaine Anonymous
* Conscientious Arsonists, Greek terrorist organization
* Countryside Alliance, UK
* Creative Assembly, PC Game Developer
* Crédit Agricole
* Cricket Australia
* Cycling Australia
Cycling Australia ???
