| Opus Kriek | Arclight Brewing Company | Fruit Lambic | 5.3% |
| Opus Reserve | Whiskey Hill Brewing Company | English Barleywine | 19.5% |
| Opus XIV:V | Ghost Train Brewing | American Imperial Stout | 13.0% |
| Or | Cigar City Brewing | Black IPA | 11.2% |
| Or Xata | The Bruery | American Blonde Ale | 7.2% |
| Ora Et Labora | Brunswick Bierworks | Doppelbock | 7.5% |
| Orabelle | Great Divide Brewing Company | Tripel | 8.3% |
| Orach Slie | Harviestoun Brewery | European Pale Lager | 6.0% |
| The Oracle | Anchorage Brewing Co | Wild Ale | 6.5% |
| The Oracle | Bell's Brewery, Inc. | Imperial IPA | 10.0% |
| The Oracle | White Pony Microbrewery | | 10.7% |
| Oracle of the Bottle | Modern Times | Wild Ale | |
| Oragami Spaceship | Defiance Brewing Company | Saison | |
| Orange & Black Congrats Ale | Moylan's Brewery & Restaurant | Black IPA | 6.0% |
| Orange Avenue Wit | Coronado Brewing Company | Witbier | 5.2% |