| Beer | Brewery | Style | ABV |
|---|---|---|---|
| Oosik Amber Ale | Midnight Sun Brewing Co. | American Amber / Red Ale | 5.0% |
| Op & Top | Brouwerij De Molen | English IPA | 4.5% |
| Op Den Ophef | Stadsbrouwerij 013 | Dubbel | 7.0% |
| Opacus Stout | StormBreaker | Oatmeal Stout | 5.0% |
| Opal | Cigar City Brewing | ||
| Opal | Firestone Walker Brewing Co. | Saison | 7.5% |
| Opaque | Akia Brygghus | ||
| Opaque Thoughts - Orange Creamsicle | Mountains Walking | New England IPA | 8.0% |
| Opaque Thoughts w/Guava | Mountains Walking | Imperial IPA | 8.0% |
| Ope! Berries | Four Fires Meadery | 10.0% | |
| Open Air | Oxbow Brewing Company | Saison | 6.5% |
| Open Arms | To Øl | American IPA | 7.0% |
| Open Container | Midnight Sun Brewing Co. | Wild Ale | 6.0% |
| Open Drums | Private Press Brewing | 16.2% | |
| Open Eye Signal | Whiplash | English IPA | 8.2% |