| Islandic Toasted Porter | Einstok | American Porter | |
| Islands in the Stream | 903 Brewers | Fruit and Field Beer | 6.2% |
| Islay | Avery Brewing Company | American Imperial Stout | 10.4% |
| Islay | Ellison Brewery & Spirits | | 10.0% |
| Islay Barrel Aged Weizen Doppelbock | VandeStreek Bier | Doppelbock | 10.0% |
| Islay Imperial Stout | Goose Island Beer Co. | American Imperial Stout | 13.3% |
| Islay Whisky Cask Ale | Innis & Gunn | Scottish Ale | 7.4% |
| Isle of Lost Hops #586 | Ravinia Brewing Company | New England IPA | 6.8% |
| Isle Of MaGourdo | Due South | | |
| Isle of Tortuga | Heist Brewery | | |
| ISO-Hazy | Figleaf Brewing Company | American IPA | 7.2% |
| ISO: Chuck Biscuits FT: Citra | Hoof Hearted Brewing | Gose | 4.5% |
| ISO: Chuck Biscuits FT: Simcoe | Hoof Hearted Brewing | Gose | 4.5% |
| ISO: Tacos | American Solera | Russian Imperial Stout | 13.0% |
| Isola-tion | Horus Aged Ales | | |