| Olde Burnside Brewing | |
| Olde Hickory Brewery | Hickory, NC |
| Olde Main Brewing | Ames, Iowa |
| The Olde Mecklenburg Brewery | Charlotte, North Carolina |
| Olde Peninsula Brewpub and Restaurant | Kalamazoo, Michigan |
| Oldenberg Brewery | Fort Mitchell, Kentucky |
| Olivers Cider & Perry | United Kingdom |
| Olvalde Farm & Brewing Company | Rollingstone, Minnesota |
| Olvi | IISALMI, Finland |
| Ölvisholt Brugghús | Iceland |
| Omer Vander Ghinste | Bellegem, Belgium |
| Omnipollo | Stockholm, Sweden |
| Omnipollo & Buxton Brewery | |
| Omnipollo / Dugges | Sweden |
| Omnipollo / Prairie Artisan Ales | Sweden |