| Insight Brewing | Minneapolis, Minnesota |
| Insight Cellars | |
| Institution Ale Company | Camarillo, CA |
| Insurrection Aleworks | Heidelberg, Pennsylvania |
| Intangible Ales | Enola, PA |
| Interboro Spirits and Ales | |
| Interbrau SpA | Villafranca Padovana, Italy |
| Intergalactic Brewing Company | San Diego, CA |
| Intrinsic Brewery | Garland |
| Intuition Ale Works | Jacksonville |
| INU Island Ales | Kaneohe |
| Invasive Species Brewing | Fort Lauderdale, Florida |
| Inveralmond Brewery | Perth, United Kingdom |
| Invercargill Brewery | Invercargill, New Zealand |
| Invertase Brewing Company | Phillipsburg, New Jersey |