| Old Kentucky Bastard | Nickel Brook Brewing | Russian Imperial Stout | 10.0% |
| Old Kentucky Stout | Great Dane Pub and Brewing | American Stout | |
| Old Knobby | East End Brewing Company | | |
| Old Knucklehead Barleywine | BridgePort Brewing | American Barleywine | 9.1% |
| Old Krogh Oatmeal Stout | Krogh's Restaurant and Brewpub | American Stout | |
| Old Leghumper | Thirsty Dog Brewing | American Porter | 6.7% |
| Old Legover | Daleside Brewery | | 4.1% |
| Old Lord Chubby Cheeks | Breakside Brewery | Wheatwine | 11.6% |
| Old LS Barleywine | Water Tower Brewing | | |
| Old Mad Joy | Great Raft Brewing | Baltic Porter | 10.0% |
| Old Mad Joy - Bourbon Barrel Aged | Great Raft Brewing | | |
| Old Mad Joy - Smoked and Oaked | Great Raft Brewing | | |
| Old Man | Tree House Brewing Company | Extra Special / Strong Bitter (ESB) | 5.4% |
| Old Man Ale | Coniston Brewing | | 4.8% |
| The Old Man and Death | Mad Fritz | American Imperial Stout | 8.2% |