CGG
CGG may refer to:
- CGG (company), a multi-national geophysical services company, formerly known as CGGVeritas
- Compagnie Générale de Géophysique, a geophysical services company that merged to form CGGVeritas in early 2007
- The Canadian Grenadier Guards, infantry regiment of Canada's military reserve force
- Church of the Great God
- Campaign for Good Governance in Sierra Leone
- Kiga language, ISO-639 language code
- A codon for the amino acid arginine
- CGG trinucleotide repeat disorder, which causes Fragile X syndrome