SFG

SFG may refer to:

Military

• Special Forces Group (Belgium)
• Special Forces Group (Japan)
• Special Forces (United States Army)#Special Forces groups

Science and Technology

• Sum-frequency generation in optical physics
• Signal-flow graph
• Superior frontal gyrus, in the human brain
• Systemic functional grammar

Other

• San Francisco Giants, a Major League Baseball team
• L'Espérance Airport, IATA airport code
• Scouting for Girls, English pop rock band
• "Super Freaky Girl", 2022 single by Nicki Minaj; widely abbreviated to "SFG" by fans