BDG may refer to:

• Bloc Démocratique Gabonais, a Gabonese political party (from 1953 to 1968)
• Blackmar–Diemer Gambit, a chess opening
• Blanding Municipal Airport (IATA code)
• Bonggi language (ISO 639-3 code)

• Roy A Childs Jr.
• Roy A. Childs Jr.
• Roy Ackerman
• Roy A. Corzine
• Roy Adams (cricketer)
• Roy Addison
• Roy Adkins (American football)
• Roy A. Haynes
• Roy A Jodrey
• Roy A. Jodrey
• Royal 22nd Regiment Band
• Royal '95
• Royal Abbey of Our Lady of Fontevraud
• Royal Academician (Cambodia)
• Royal Academy, Colombo
• Royal Academy of Arts Collections
• Royal Academy of Budapest
• Royal Academy of Dutch language and literature
• Royal Academy of Fine Arts (Ghent)
• Royal Academy of Fine Arts in Ghent
• Royal Academy of Fine Arts (Naples)
• Royal Academy of Fine Arts, Venice
• Royal Academy of Moral and Political Sciences
• Royal Academy of Munich
• Royal Academy of Music Library