FRG may refer to:
- Family Readiness Group in the United States Army
- Federal Republic of Germany
- FMN reductase (NAD(P)H)
- Friendship Radiosport Games
- Functional renormalization group
- Guatemalan Republican Front (Spanish: Frente Republicano Guatemalteco), a defunct political party in Guatemala
- Republic Airport in East Farmingdale, New York, United States
- BRD (Germany)
This disambiguation page lists articles associated with the title FRG.
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