| Innsmouth Old Ale | The Narragansett Brewing Company | Old Ale | 7.0% |
| Inoculator | 3 Sons Brewing Co | Doppelbock | 6.9% |
| Inosculation | Holy Mountain | American Imperial Stout | 13.5% |
| Inquitous | Baerlic | American Stout | 8.5% |
| Insalata | Muckraker Beermaker | | |
| Insane In The Grain | Cypress Brewing Company | Imperial IPA | 8.3% |
| Insane In the Grain (Spelt) | To Øl | New England IPA | 7.2% |
| Insane in the Membrane | Brouwerij Frontaal | English IPA | 5.5% |
| Insane In the Yeast Strain | Seven Stills Brewery and Distillery | New England IPA | 8.5% |
| Insanely Bad Elf | Ridgeway Brewing | English Strong Ale | 11.2% |
| Insanity | Weyerbacher Brewing Company | American Barleywine | 11.1% |
| Insensitive | Definitive Brewing Company | New England IPA | 7.0% |
| Insert Hop Reference Here | Brew Link Brewing Co | American Pale Ale | 5.8% |
| Insetto | Stillwater Artisanal Ales | | 5.0% |
| Inside a Broken Clock | Bizarre Brewing | European Pale Lager | 4.2% |