| Iron Fire | California |
| Iron Fist Brewing Company | Vista, Califonia |
| Iron Hill Brewery | Wilmington, DE |
| Iron Hill Brewery - Newark | Newark, Delaware |
| Iron Hill Brewery - Wilmingon | Wilmington, Delaware |
| Iron Horse Brewery | Ellensburg, Washington |
| Iron Springs Pub & Brewery | Fairfax, California |
| Ironfire Brewing Company | |
| Ishikawa Brewery | Tokyo-to Fussa-shi, Japan |
| Island Brewing Company | Carpinteria, California |
| Isle de Garde | Montréal, Canada |
| Isle of Skye Brewing Company | Isle of Skye, United Kingdom |
| Isley Brewing Company | Richmond |
| Issaquah Brewhouse | Issaquah, Washington |
| Ithaca Beer Company | Ithaca, New York |