FDG may refer to:
Politics
- Democratic Forces of Guiana (French: ), a political party in French Guiana
- Left Front (France) or , an electoral federation
- Youth Front (), the youth wing of the neofascist Italian Social Movement
Science
- Fluorodeoxyglucose (18F)
- Fluid dynamic gauge
Other uses
- Fording Canadian Coal Trust, a Canadian corporation (2003–2008)
- Friedrich-Dessauer-Gymnasium, Frankfurt, a school in Germany
- Functional discourse grammar, a linguistic model