BGA may refer to:

• Battle Ground Academy, a private school in Franklin, Tennessee, US
• Behavior Genetics Association
• Boldklubberne Glostrup Albertslund, a Danish football club
• British Gear Association
• British Gliding Association
• British Go Association
• British Geophysical Association
• British-German Association
• Bumitama Gunajaya Agro, an Indonesian palm oil company
• Bundesverband Großhandel, Außenhandel, Dienstleistungen (The Federation of German Wholesale, Foreign Trade and Services)

• Brundall Gardens railway station, Norfolk, England, by National Rail station code
• Palonegro International Airport, Colombia, by IATA code

• Ball grid array, a type of surface-mount packaging used for integrated circuits
• Cyanobacteria (blue-green algae)
• Break glass alarm, a type of manually activated fire alarm; see Fire alarm pull station
• Bach-Gesellschaft Ausgabe, the first complete edition of Johann Sebastian Bach's compositions
• Boys Generally Asian (BgA), a parody K-Pop group