ICAS

ICAS may refer to:


 * Ilahia college of Arts and Science, India
 * Immaculate Conception Apostolic School, a former boys' boarding school in Center Harbor, New Hampshire
 * Institute of Chartered Accountants of Scotland
 * Institute of Contemporary Asian Studies at Temple University, Japan Campus
 * International Competitions and Assessments for Schools, a suite of six full-colour competitions designed specifically for primary and secondary students.
 * International Cooperation on Airport Surveillance, headquartered in Zurich, Switzerland
 * International Council of the Aeronautical Sciences
 * International Council of Arbitration for Sport, the organisation that runs the Court of Arbitration for Sport
 * Isolated congenital asplenia, a disease