| Illudium | Straight to Ale Brewing | | 11.5% |
| Illuminati | Crane Brewing | | |
| Illuminati | Leelenau Brewing Company | American Stout | 8.5% |
| Illuminating the Path | Cigar City Brewing | American Strong Ale | 11.0% |
| Illumination | Enlightenment Ales | Belgian IPA | 6.8% |
| Illumination | Otherlands Beer | | 5.8% |
| Illumination Double IPA | Central Waters Brewing Company | Imperial IPA | 9.0% |
| Illuminator Doppelbock | Half Moon Bay Brewing | Bock | 6.8% |
| Illuminatos | Lickinghole Creek Craft Brewery | American Imperial Stout | 11.3% |
| Illusion | Bearded Iris Brewing | New England IPA | 8.0% |
| Illusion of Reality | Taproom Beer Co | American Imperial Stout | |
| Illusion-O | Tired Hands | Fruit and Field Beer | |
| Illustration Ale | East End Brewing Company | Belgian Dark Strong Ale | 9.4% |
| Ilskebeist Steel Aged Quadrupel | 7 Fjell bryggeri | Quadrupel (Quad) | 11.3% |
| Im in love with the coco | Prairie Artisan Ales | | |