| Juniper Brewing Company | Bowling Green |
| Junkyard Brewing Company | Moorehead |
| Jurupa Valley Brewing | Riverside, California |
| Justice Brewing | Everett |
| JW Lees and Co. (Brewers) Ltd. | United Kingdom |
| K. Stone Brewing | Petaluma, CA |
| Kaapse Brouwers | |
| Kabinet brewery | Nemenikuće, Serbia |
| Kaiba Craft Beer | China |
| Kainui | New Zealand |
| Kaiser-Bru | Neuhaus, Germany |
| Kaiserdom Privatbrauerei Bamberg | Bamberg, Germany |
| Kalamazoo Brewing | Kalamazoo, Michigan |
| Kalona Brewing Company | |
| Kaltenberg International / König Ludwig International GmbH & Co.KG | Fürstenfeldbruck |