| Brewery | Location |
|---|---|
| Atom Brewing | Erie, Colorado |
| Atrium | Belgium |
| Atrium Brewing | Louisville |
| Attik Brewing | Torremolinos, Spain |
| Atwater Block Brewing | Detroit, Michigan |
| Atwater Brewery | Detroit, Michigan |
| Au Grimoire Des Légendes | Aywaille, Belgium |
| Auburn Alehouse | Auburn |
| AuerBräu AG | Rosenheim |
| Augenbrauerei Biel | Biel-Bienne, Switzerland |
| August Schell Brewing | New Ulm, Minnesota |
| Augusta Brewing | Augusta, Missouri |
| Augustiner-Bräu München | München, Germany |
| Augustinus | Spain |
| Aurora Ale & Lager Co | King Ferry |