CSEC

CSEC may refer to:


 * Calgary Sports and Entertainment Corporation, owner and operator of several Calgary-based sports teams
 * Caribbean Secondary Education Certificate
 * Communications Security Establishment Canada, later known as the Communications Security Establishment, the Canadian government's national cryptologic agency
 * Commercial sexual exploitation of children
 * Commission on State Emergency Communications, an agency of the State of Texas; see Steve Mitchell
 * Citadel Security Services, in the computer game Mass Effect