CIH

CIH or cih may refer to:


 * CIH (computer virus), also known as Chernobyl and Spacefiller
 * CIH Bank, a wholly owned subsidiary of the Moroccan Caisse de dépôt et de gestion
 * Capricorn Investment Holdings, a southern African umbrella for the Capricorn group of companies
 * Certified Industrial Hygienist, professional credential for occupational hygienists in the United States
 * IATA code for Changzhi Wangcun Airport
 * The Chartered Institute of Housing, a UK-based professional society
 * ISO 639-3 code for the Chinali language
 * Opel cam-in-head engine, a series of vehicle engines
 * Chromogenic immunohistochemistry