| Brewery | Location |
|---|---|
| Iron Monk | Stillwater, OK |
| Iron Spike Brewing Company | Galesburg, Illinois |
| Iron Springs Pub & Brewery | Fairfax, California |
| Iron Triangle Brewing | Los Angles, California |
| Iron Tug Brewing | Rochester, New York |
| Ironfire Brewing Company | |
| Is/Was Brewing | Chicago , Illinois |
| Isastegi Cider House | Spain |
| Ishikawa Brewery | Tokyo-to Fussa-shi, Japan |
| Island Brands | |
| Island Brewing Company | Carpinteria, California |
| Islay Ales | Bridgend |
| Isle de Garde | Montréal, Canada |
| Isle of Skye Brewing Company | Isle of Skye, United Kingdom |
| Isley Brewing Company | Richmond |