CHI

The initialism CHI may refer to:

Health

 * Catholic Health Initiatives, a hospital network in the United States
 * Child Health International, UK-based charity
 * Commission for Health Improvement, former UK body
 * Community Health Index, Scotland
 * Comprehensive health insurance
 * Creatinine height ratio, estimating protein in body composition

Places & Sports Teams

 * An abbreviation for the U.S. city of Chicago, Illinois and its major professional sports teams
 * Chicago Bears of the National Football League
 * Chicago Blackhawks of the National Hockey League
 * Chicago Bulls of the National Basketball Association
 * Chicago Cubs, also CHC, of Major League Baseball
 * Chicago Fire of Major League Soccer
 * Chicago White Sox, also CWS, of Major League Baseball
 * Chile (in sports: IOC and FIFA code CHI)
 * Channel Islands, a UK dependency (Chapman code: CHI)

Science and technology

 * Carvill Hurricane Index
 * Computer–human interaction or human–computer interaction
 * CHI (conference)
 * CHI (compiler), an Intel C compiler for heterogeneous integration
 * Hyperbolic cosine integral, in trigonometry

Transit

 * Chingford railway station, United Kingdom — railway station code
 * IATA code for all Chicago airports
 * Chicago Union Station (Amtrak code)
 * Chiltern railway station, Australia

Other

 * Chichester and Harbour Independents, a minor British political party (Chichester, England)
 * Columbia Helicopters, an American aircraft manufacturer
 * CHI, one of Longwood University § Secret societies (Virginia, USA)
 * Cationic Hydration Interlink, a hair-care brand owned by Farouk Systems (founded by Farouk Shami).