| Ol’ Lifewine BBA Barleywine Ale | Matchless | English Barleywine | 14.5% |
| OM | Floodland Brewing | Saison | 5.6% |
| Oma | Shared | Helles | 4.2% |
| Oma Lodewijk | Brouwerij Eleven | Belgian Blonde Ale | 5.5% |
| Omega | Alvinne Picobrouwerij | Wild Ale | 6.0% |
| Omega | Brouwerij Alvinne | Lambic | 6.0% |
| Omega Midnight | Ale Syndicate Brewers | Foreign / Export Stout | 9.5% |
| Omega Point | Olde Hickory Brewery | American Barleywine | 10.0% |
| Omega Point 25th Anniversary | Olde Hickory Brewery | English Barleywine | 11.7% |
| Omegatex | Fort George Brewery | Imperial IPA | 9.9% |
| Omelas | Tired Hands | Saison | |
| Omen Belgian Raspberry Stout (Apocalypse Series) | Elysian Brewing Co. | American Stout | 7.2% |
| Omen Belgian-Style Raspberry Stout (2015) | Elysian Brewing Co. | | 7.9% |
| Omer Traditional Blond | Omer Vander Ghinste | Belgian Blonde Ale | 8.0% |
| OMER. Brut Nature | Omer Vander Ghinste | Brett Beer | 7.0% |