| Ojos Negros | Rivertown Brewing Company | Fruit Lambic | 6.5% |
| Ojuice | Three Magnets Brewery | Imperial IPA | 8.2% |
| OK Brewer | Triptych Brewing | American IPA | 6.3% |
| OK, Boomer | Brouwerij Frontaal | English IPA | 8.5% |
| OK-Si | Prairie Artisan Ales | Russian Imperial Stout | 12.0% |
| Ok2berfest | Two Roads Brewing Co. | Märzen | 5.8% |
| Oki Doki IPA | ALL IN Brewing & Brouwerij de Molen | American IPA | 6.9% |
| Okie | Prairie Artisan Ales | American Brown Ale | 13.0% |
| Okie Matilda | Birrificio Toccalmatto | Belgian Pale Ale | 6.2% |
| Okie Matilde | Prairie Artisan Ales | Saison | |
| Okie Paradise | Prairie Artisan Ales | American Imperial Stout | 12.0% |
| Oklahoma Creampie | Prairie Artisan Ales | American Imperial Stout | 14.0% |
| Okocim Porter | Browar Okocim | American Porter | 8.3% |
| Okra | Parish Brewing | Imperial IPA | 8.0% |
| Öktö | Cervejaria Colorado | | 5.0% |