| 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% |
| Okto Festival Ale | Widmer Brothers Brewing | Altbier | 5.3% |
| Oktober Fest - Märzen | Brauerei Aying Franz Inselkammer KG | Märzen | |
| Oktober Hellas Organic | S:t Eriks Bryggeri | Helles | 5.6% |
| Oktoberdunkel | Dugges Ale- & Porterbryggeri AB | European Dark Lager | 6.0% |