| Infusion Brewing Company | Omaha |
| Inland Empire Brewing Company | Riverside, CA |
| Inlet Brewing Company | Jupiter, Florida |
| Innis & Gunn | Edinburgh, United Kingdom |
| Innocente Brewing Company | Waterloo |
| Institution Ale Company | Camarillo, CA |
| Intangible Ales | Enola, PA |
| Interbrau SpA | Villafranca Padovana, Italy |
| Intergalactic Brewing Company | San Diego, CA |
| Intuition Ale Works | Jacksonville |
| Inveralmond Brewery | Perth, United Kingdom |
| Invercargill Brewery | Invercargill, New Zealand |
| Ipswich Ale Brewery | Ipswich |
| Irish Brewing Company | Newbridge, Ireland |
| Iron City Brewing Co. | Pittsburgh, Pennsylvania |