OCI

OCI may refer to:

Businesses and organizations

 * OCI (company), green energy and chemical company, South Korea
 * Oakwood Collegiate Institute, Toronto, Canada
 * Office of Criminal Investigations of the U.S. Food and Drug Administration
 * Olympic Council of Ireland, former name the national olympic committee of Ireland
 * Ontario Cancer Institute, Canada
 * Order of the Crown of Italy, Italian order
 * Open Constitution Initiative, advocacy group in China
 * OCI NV, parent company of Orascom Construction
 * Ottawa Collegiate Institute, now Lisgar Collegiate Institute, Canada
 * Organisation Communiste Internationaliste, (Internationalist Communist Organisation), former French political party

Computing

 * Open Catalog Interface, an interface standard in computing
 * Open Container Initiative, a Linux standards project in computing
 * Oracle Call Interface, database interface software

Other uses

 * oci, ISO 639-2/3 language code for Occitan language
 * Organizational conflict of interest
 * Other comprehensive income
 * Overseas Citizen of India, a scheme granting a status similar to, but not the same as, dual citizenship in India