| Old Smoked Bock | Meantime Brewing Company Limited | Bock | 6.5% |
| Old Smoky | Backcountry Brewery | American Lager | |
| Old Sol Wheatwine Ale | Big Time Brewing | Wheatwine | 10.0% |
| Old Soul | Crazy Mountain | Belgian Pale Strong Ale | 7.5% |
| Old Soul | Trillium Brewing Company | American Barleywine | 9.3% |
| Old Sour Cherry Porter | Rivertown Brewing Company | | |
| Old Speckled Hen | Morland and Co. | English Pale Ale | 5.2% |
| Old Split-Foot | Broken Bow Brewery | | |
| Old St Nick | Small Gods | American Imperial Stout | 12.1% |
| Old Stock - Cellar Reserve (Brandy Barrel) | North Coast Brewing Co. | Old Ale | 15.2% |
| Old Stock 2013 | North Coast Brewing Co. | Old Ale | 11.9% |
| Old Stock 2020 | North Coast Brewing Co. | | |
| Old Stock Ale | North Coast Brewing Co. | Old Ale | 11.9% |
| Old Stock Ale | Red Brick Brewing Company | | |
| Old Stock Ale (Maréchal Foch) | Microbrasserie L'Hermite | Old Ale | 9.3% |