| Oerbier special reserva 2019 | Brouwerij De Dolle Brouwers | Flanders Red Ale | 12.0% |
| Oersoep Sergant Pepper | Oersoep | Saison | 7.1% |
| Oesterstout | Scheldebrouwerij | | 8.5% |
| Of a Feather | The Eighth State Brewing Company | American Imperial Stout | |
| Of Fire & Earth - DANSAERT | Brussels Beer Project | | 6.2% |
| Of First and Last Things | Hill Farmstead | American IPA | 6.5% |
| Of Love and Regret | Stillwater Artisanal Ales | Saison | 7.2% |
| Of Sand and Snow | Cycle / New Belgium | Baltic Porter | 8.3% |
| Off Hand | Iron Fist Brewing Company | Saison | 6.7% |
| Off KIL Ter Scottish Ale | Olde Main Brewing | | |
| Off Tha Rictor | J. Wakefield Brewing | | |
| Off the Bark | Sand Devil Brewery | American Porter | 10.2% |
| Off The Beaten Path | Jackie O's Pub & Brewery | | |
| Off the Cuff | Two Brothers Brewing | American Stout | 7.2% |
| Off The Grid | Jekyll Brewing | English Barleywine | 10.8% |