| Oro Zuur | Brasserie Dunham | | 5.5% |
| Oro Zuur (Mosaic) | Brasserie Dunham | Wild Ale | 5.5% |
| Oro Zuur (Pamplemousse et Vic Secret) | Brasserie Dunham | Wild Ale | 5.0% |
| Orogenesis: Antler | Great Basin Brewing Company | Flanders Red Ale | 7.1% |
| Orogenesis: Garnet | Great Basin Brewing Company | American Barleywine | 9.3% |
| Oronoko Cocoa Stout | The Round Barn Winery & Brewery | Sweet / Milk Stout | 5.8% |
| Orphan Road with 3 Magnets | Edison City Alehouse | English Stout | 10.0% |
| Orphanage | Sante Adairius Rustic Ales | Wild Ale | 6.1% |
| Orphic Fragments | Modern Times | | 8.1% |
| Orter I Morker | Jester King Craft Brewery | Saison | 7.9% |
| Ortolan Bunting - Mezcal (Ghost 232) | Adroit Theory | American Strong Ale | 9.1% |
| Orval Trappist Ale | Brasserie d'Orval | Belgian Pale Ale | 6.9% |
| Orviamo | Side Project | Wild Ale | 10.0% |
| Osage Golden Wheat Ale | TwoRows Restaurant & Brewery - Dallas | American Lager | |
| OSB Premium Ale | Tomos Watkin and Sons Ltd. | | 4.5% |