BFG may refer to:

• The BFG (Big Friendly Giant), a children's book by Roald Dahl
• The BFG (film), a movie based on the book
• BF Goodrich, tire manufacturer
• BFG Technologies, an American graphics card manufacturer
• British Forces Germany
• Battlefleet Gothic, Games Workshop's tabletop wargame, set in the Warhammer 40,000 universe
• Iterations of the BFG from the Doom computer game series; these include:
  • BFG9000, the fictional weapon of the classic first-person shooter Doom
  • BFG10K, the fictional weapon of the first-person shooters Quake II and Quake III: Arena
• The name for an electric guitar wielded by one of the main characters in an episode of the ReBoot cartoon series.

BFG | BFG | BFG