| Irreverent Red IPA | Warped Wing Brewing Company | American Amber / Red Ale | 6.3% |
| Irvington Porter | Alameda Brewhouse | American Porter | |
| Is Radical Café | HopEra Microbrasserie & Pizzeria | American Imperial Stout | 10.0% |
| Is Radical Cognac | HopEra Microbrasserie & Pizzeria | Russian Imperial Stout | 11.0% |
| Is That Cedar Spelt Ryeght? | Jopen | Imperial Porter | 9.0% |
| Is the Spider Small | Cloudwater | New England IPA | 6.0% |
| Is This The Real Life? | SingleCut Beersmiths | American IPA | 7.2% |
| Is Ticking Clock | Smog City Brewing Company | American Imperial Stout | 8.7% |
| is travel a verb? | Everywhere | American Imperial Stout | 13.6% |
| ISA Américaine | Brasseurs sur demande | American IPA | 4.2% |
| Isaac | Birrificia Le Baladin | Witbier | 5.0% |
| Isabel Barrel Aged Robust Porter | Blue Mountain Brewery | | |
| Isabella Blonde | Kern River Brewing Company | American Blonde Ale | 4.5% |
| Isabelle Proximus | The Lost Abbey | Wild Ale | 7.0% |
| Isaria | Triptych Brewing | European Pale Lager | 4.9% |