PBG is a three-letter abbreviation which may represent:

• Palm Beach Gardens, Florida, a US city
• Parallel Blade with Ground, a term used in theater lighting to designate an ordinary NEMA 5-15 electrical power connector
• The Pepsi Bottling Group (NYSE:PBG), a US company
• Porphobilinogen
• Plattsburgh International Airport in Plattsburgh, New York (IATA Code: PBG)
• Photonic band gap, a property of Photonic crystals
• Paintball gun (marker)
• Pole of Good Government, a former political alliance in Italy
• PeanutButterGamer, a YouTube show created by internet personality and Normal Boots co-creator, Austin Hargrave.

• Justus Henning Bohmer
• Justus Henning Böhmer
• Justus Henry Nelson
• Justus Hermann Lipsius
• Justus H. Nelson
• Justus Johann Friedrich Dotzauer
• Justus Koech
• Justus Lehmann
• Justus Liebig's Annalen der Chemie
• Justus Liebigs Annalen der Chemie
• Justus-Liebig University
• Justus Liebig University
• Justus Lipsius building
• Justus Miles Forman
• Justus Moser
• Justus Nelson
• Justus of Alexandria
• Justus of Beauvais
• Justus of Tiberias
• Justus of Urgell
• Justus Oosterlaak
• Justuss
• Justus Scaliger
• Justus Scharowsky
• Justus Scrafford