Clas

Clas or CLAS may refer to:


 * Clas (given name)
 * Clas (ecclesiastical settlement), a medieval church in Wales
 * CLAS (education), a standards-based assessment used in California
 * CLAS detector, the CEBAF Large Acceptance Spectrometer at the Thomas Jefferson National Accelerator Facility
 * CESG Listed Advisor Scheme, a system of IT Security specialists working on government computer systems in the UK
 * University of Florida College of Liberal Arts and Sciences
 * University of Iowa College of Liberal Arts and Sciences
 * Center for Latin American Studies - University of Pittsburgh
 * Community Legal Assistance Society, a legal aid office in Vancouver, British Columbia.
 * Conjugated linoleic acids