| Brewery | Location |
|---|---|
| Ass Clown | Cornelius |
| Ass Kisser Ales | San Jose, California |
| Atelier Vrai | Heidelbach, Germany |
| Athenian Brewery | Athens, Greece |
| Athletic Brewing Co. | Stratford, Connecticut |
| Atlanta Brewing Company | Atlanta, Georgia |
| Atlantic Brewing Company | Bar Harbor, Maine |
| Atlas Brew Works | Washington D.C. |
| Atom Brewing | Erie, Colorado |
| Atrium | Belgium |
| Atwater Block Brewing | Detroit, Michigan |
| Atwater Brewery | Detroit, Michigan |
| Au Grimoire Des Légendes | Aywaille, Belgium |
| Auburn Alehouse | Auburn |
| AuerBräu AG | Rosenheim |