| Old Engine Oil Special Reserve (aged in malt whisky casks) | Harviestoun Brewery | | 8.0% |
| Old Engine Zymatore | Harviestoun Brewery | English Porter | 6.0% |
| Old English Ale | San Marcos Brewery & Grill | Old Ale | |
| Old Faithful Ale | Grand Teton Brewing Co. | American Pale Ale | |
| Old Fashioned | Brooklyn Brewery | Rye Beer | 12.8% |
| Old Fashioned | Wicked Weed | | 10.0% |
| Old Fashioned Berliner Weisse | MobCraft Beer | Berliner Weisse | 5.0% |
| Old Fashioned Shandy | Jacob Leinenkugel Brewing Company | | 4.2% |
| Old Fezziwig Ale | Samuel Adams | Winter Warmer | 5.9% |
| Old fisherman's Ale 2015 | Pannepot | | 10.0% |
| Old Flame | DuClaw | American Strong Ale | 7.5% |
| Old Foghorn | Anchor Brewing | English Barleywine | 8.2% |
| Old Foghorn 2002 | Anchor Brewing | | 10.0% |
| Old Ford Export Stout | Redchurch brewery | Russian Imperial Stout | 7.5% |
| Old Fort Howard Pale Ale | Titletown Brewing | American Pale Ale | |