| Mt. Nittany Pale Ale | Otto's Pub and Brewery | American Pale Ale | 5.0% |
| Mt. Takhoma Blonde Ale | Harmon Brewing Company | American Blonde Ale | 3.8% |
| Mt.Tam Pale Ale | Marin Brewing | American Pale Ale | 5.8% |
| Mu | Pellicle Vergistingen | | |
| Much Ado About Muffin | Siren Craft Brew | English Pale Ale | 5.5% |
| Much Appreciated | Sante Adairius Rustic Ales | Wild Ale | 8.5% |
| Muchacho Mexican Lager | Good People Brewing Co | American Lager | 4.8% |
| Mud & Funk | Brouwerij De Molen | | |
| Mud & Funk | De Molen / Anchorage | American Imperial Stout | 11.4% |
| Mud Hill Stout | Cigar City Brewing | Russian Imperial Stout | 9.3% |
| Mud Puppy Porter | Central Waters Brewing Company | American Porter | 5.5% |
| Mud Supreme Mudslide Stout | Junkyard Brewing Company | | 11.3% |
| Mud Turtle | Buffalo Bayou Brewing Company | Scotch Ale / Wee Heavy | 9.2% |
| Mudbank Milk Stout | Neshaminy Creek Brewing Company | | |
| Mudcat Stout | Upper Mississippi Brewing | American Stout | |