I
- Idaho Brewing & Malting Co. - ID 11
- Idaho Brewing Co. - ID 11
- Illinois Brewing Co. - NM 19
- Imperial Beverage Co. - PA 156
- Imperial Brewing Co. - MO 44
- Independent Brewing & Malting Co. - IA 66
- Independent Brewing Assn. - IL 117
- Independent Brewing Co. - MI 77
- Independent Brewing Co. - WA 59
- Independent Brewing Co. - WI 311
- Independent Home Brewing Co. - OH 304
- Independent Koenig Brewing Co. - NY 45
- Indianapolis Brewing Co. - IN 69 & 70
- Inland Brewing & Malting Co. - WA 79
- International Breweries, Inc. - FL 16
- International Breweries, Inc. - NY 201
- International Brewing Co. - NY 206
- Inter-State Brewing Co. - IA 217
- Iron City Brewing Co. - PA 273
- Ironwood Brewing Co. - MI 172
- Iroquois Beverage Corp. - NY 201
- Iroquois Brewing Co. - NY 201
- Isengart Brewing Co. - NY 685