| Ohio City Oatmeal Stout | Great Lakes Brewing | American Stout | 4.8% |
| Ohio Unidragon | Clown Shoes | Russian Imperial Stout | 11.5% |
| Ohrwal | Huisstekerij h.ertie | Gueuze | 6.5% |
| Oi! | Bissell Brothers | English Bitter | 4.5% |
| Oil Can Stout | Sanford's Grub and Pub | American Stout | |
| Oil Change Oatmeal Stout | Flat Branch Pub & Brewing | Oatmeal Stout | |
| Oil Man | Elevation Beer Co. | American Imperial Stout | 11.0% |
| Oil Man | Elevator Brewing Company | American Imperial Stout | 10.8% |
| Oil Man Coconut | Elevation Beer Co. | American Imperial Stout | 10.8% |
| Oil Man Coconut | Elevator Brewing Company | American Imperial Stout | 10.8% |
| Oil Man Coffee | Elevator Brewing Company | American Imperial Stout | 10.8% |
| Oil Man Vanilla | Elevator Brewing Company | American Imperial Stout | 10.8% |
| Oil of Aphrodite | Jackie O's Pub & Brewery | American Imperial Stout | 10.0% |
| Oil of Aphrodite - Almond and Vanilla Bourbon | Jackie O's Pub & Brewery | | 12.4% |
| Oil of Aphrodite - Rum Barrel Aged | Jackie O's Pub & Brewery | American Imperial Stout | 10.0% |