| Brewery | Location |
|---|---|
| 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 |
| Oliphant | Somerset |
| Oliver Ales | |
| Olivers Cider & Perry | United Kingdom |
| Ology Brewing | |
| Olvalde Farm & Brewing Company | Rollingstone, Minnesota |
| Olvi | IISALMI, Finland |
| Ölvisholt Brugghús | Iceland |
| Omer Vander Ghinste | Bellegem, Belgium |
| Omni Brewing Co. | Maple Grove |