| 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% |
| Iscider (2014) | Håkan | Fruit and Field Beer | 9.0% |
| Ise Kadoya Stout | Nikenjayamochi Kadoya Honten Co. | American Stout | 5.0% |
| Ish | Oxbow Brewing Company | | |
| Ishmael | Rising Tide | American Brown Ale | |