| C&GC | Climate and Global Change Program 
| Others |
| C.G.C. | Conspicuous Gallantry Cross (British)
| Others |
| CG(C) | Certified Genealogist (Canada)
| Others |
| CGC | Cadastro Geral de Contribuinte
| Others |
| CGC | Caenorhabditis Genetics Center
| Others |
| CGC | Cainine Good Citizen
| Others |
| CGC | California Gun Club
| Others |
| CGC | Canadian Grain Commission
| Others |
| CGC | Canberra Gemini Club
| Others |
| CGC | Cancer Genomics Cloud
| Others |
| CGC | Cancer Genomics Consortium
| Others |
| CGC | Canine Good Certificate
| Others |
| CGC | Canine Good Citizen
| Others |
| CGC | Canine Good Citizen Certificate
| Others |
| CGC | Canine Good Citizens
| Others |
| CGC | Canine Good Citizenship
| Others |
| CGC | Canopy Growth Corp
| Others |
| CGC | Canopy Growth Corporation
| Others |
| CGC | Cape Gloucester, Papua New Guinea
| Others |
| CGC | Captains Girls Club
| Others |
| CGC | Car Girl Culture
| Others |
| CGC | Car Guy Chronicles
| Others |
| CGC | Center for Global Change
| Others |
| CGC | Center For Gravitation And Cosmology
| Others |
| CGC | Center for Guardianship Certification
| Others |
| CGC | Centre for Global Competency
| Others |
| CGC | certification and grading Comic
| Others |
| CGC | Certified General Contractor
| Others |
| CGC | Certified Genetic Counselor
| Others |
| CGC | Certified Guarantee Company
| Others |
| CGC | Certified Guaranty Company
| Others |
| CGC | Character Generation Character
| Others |
| CGC | Chenega Government Consulting
| Others |
| CGC | Chief Gun Captain
| Others |
| CGC | Child Guidance Council
| Others |
| CGC | Chipset Graphics Controller
| Others |
| CGC | Classic Gas Coupe
| Others |
| CGC | Clean Green Cars
| Others |
| CGC | Cleaner Greener Communities
| Others |
| CGC | Coast Guard Command
| Others |
| CGC | Coast Guard Cutter
| Others |
| CGC | Color Glass Condensate
| Others |
| CGC | Comics Guarantee Corporation
| Others |
| CGC | Comics Guaranty Corporation
| Others |
| CGC | Command Guidance Computer
| Others |
| CGC | Common Gamma Chain
| Others |
| CGC | Commonwealth Grants Commission
| Others |
| CGC | Community Garden Connections
| Others |
| CGC | Competitive Gaming Conference
| Others |
| CGC | Compressed Gas Cylinder
| Others |
| CGC | Computer Gamers Collective
| Others |
| CGC | Computer Generated Cardboard
| Others |
| CGC | Computer Generated Character
| Others |
| CGC | Computer Generated Citation
| Others |
| CGC | Computer Generated Code
| Others |
| CGC | Computer Generated Constant
| Others |
| CGC | Computer Generated Content
| Others |
| CGC | Computer Graphics Conferences
| Others |
| CGC | Conseil Gabonais des Chargeurs
| Others |
| CGC | Conspicuous Gallantry Cross
| Others |
| CGC | Conspicuous Gallantry Cross (UK military)
| Others |
| CGC | Consumer Generated Content
| Others |
| CGC | Corporate Giving Connection
| Others |
| CGC | Couture goes Corporate
| Others |
| CGC | Cracking the Genetic Code
| Others |
| CGC | Cranbury Golf Club
| Others |
| CGC | Crazy Girls Club
| Others |
| CGC | Credit Guarantee Corporation
| Others |
| CGC | Cyber Grand Challenge
| Others |