| The Old School the New | Garden Path Fermentation | American IPA | 7.2% |
| Old Scoundrel | Sound Brewery | English Barleywine | 10.4% |
| Old Scratch Barleywine 1997 | Great Dane Pub and Brewing | | |
| Old Scratch Lager | Flying Dog Brewery | American Amber / Red Ale | 5.5% |
| Old Scrooge Christmas Ale | Silver City Brewing Co. | | |
| Old Seattle Lager | Maritime Pacific Brewing | American Lager | 4.3% |
| Old Serenade | Birrificio Toccalmatto | Old Ale | 11.3% |
| Old Skal | Beau's All Natural Brewing Co. | Flanders Oud Bruin | |
| Old Skeezer Barley Wine | Pearl Street Brewery | | |
| Old Skook | Three Magnets Brewery | English Barleywine | 11.1% |
| Old Skook in the Woods | Three Magnets Brewery | American Barleywine | 12.1% |
| Old Slug Porter | RCH Brewery | American Porter | 4.5% |
| Old Slugger Pale Ale | Cooperstown Brewing Company | American Pale Ale | 5.5% |
| Old Smoked Bock | Meantime Brewing Company Limited | Bock | 6.5% |
| Old Smoky | Backcountry Brewery | American Lager | |