CDG may refer to:
- Caisse de dépôt et de gestion, Moroccan pension fund.
- Charles de Gaulle, French general and politician
- IATA code for Charles de Gaulle Airport, in Paris, France
- ICAO code for Shandong Airlines, based in Shandong, China
- The French aircraft carrier Charles de Gaulle (R91)
- Gulf Cartel Cartel de Golfo in Spanish
- Croix de guerre
- coup de grâce, a death blow of an already shot, but not yet dead, person during a military or civilian execution.
- Calcium diglutamate
- Congenital disorder of glycosylation also known as "CDG Syndrome"
- CD+G also known as "CD+Graphics", a format of Compact Disc including both audio and video graphics
- Card-driven (war)game
- Costume Designers Guild
- Cave Diving Group
- CAIA Delay-Gradient, in computer networking, a congestion control algorithm