CIG may refer to:
Organizations Cambridge Information Group, a privately held global investment firm focusing on information services, education and technology Confederación Intersindical Galega (Galician InterTrade Union Confederation) is a Galician Trade union with the legal status of more representative trade union in Spain Columbia Insurance Group, a private US insurance company Central Intelligence Group, the predecessor to the Central Intelligence Agency, active between 1946 and 1947 Cloud Imperium Games, a PC game software developer CIG, New York Stock Exchange stock symbol for Companhia Energetica de Minas Gerais S.A. Conflict Insights Group, a private security research firm
Others The IEEE Conference on Computational Intelligence and Games, an annual conference on computational intelligence research related to game applications Cig, a colloquial term for a cigarette The Canadian Improv Games, an annual nationwide Improvisation competition for high school students in Canada Corpus Inscriptionum Graecarum (Berlin, 1825–1877), the first attempt at a standard corpus of the Greek inscriptions of Antiquity Computational Infrastructure for Geodynamics, an organization that develops and maintains open-source software for computational geophysics Conditional Intensity Group, used in convective outlooks issued by the Storm Prediction Center. IATA airport code for Craig-Moffat Airport Cig, a village in Tăşnad Town, Satu Mare County, Romania Copper indium gallium selenide solar cells, a kind of a flexible, thin film solar cell Career Integration Grants, part of Marie Curie Actions European research grants Converter interfaced generation CIG, an abbreviation for the Corpus Inscriptionum Graecarum a collection of ancient Greek inscriptions CIGS, an abbreviation for Chief of the Imperial General Staff, the predecessor of the British Chief of the General Staff post