| Orlio Seasonal India Pale Ale | Orlio Organic | American IPA | 5.4% |
| Orme | Bragdy'r Gogarth | English Bitter | |
| Ornament | North Brewing Co. | American IPA | |
| Ornamental | Phase Three Brewing Company | Saison | 6.8% |
| Ornery Amber Lager | Tommyknocker Brewery and Pub | American Lager | |
| Oro Agrio | Rivertown Brewing Company | Wild Ale | |
| Oro de Calabaza | Jolly Pumpkin Artisan Ales | Belgian Pale Strong Ale | 8.0% |
| Oro de Calabaza - Grand Reserve | Jolly Pumpkin Artisan Ales | Wild Ale | 8.0% |
| Oro Negro | Jackie O's Pub & Brewery | American Imperial Stout | 10.5% |
| 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% |