| Marzenbier | Green Bay Brewing | Märzen | |
| Märzenbier | Westbrook Brewing | Märzen | 6.0% |
| Marzipandimonium | The Bruery | American Imperial Stout | 16.7% |
| Marzoni's Amber Lager | Marzoni's Brick Oven & Brewing Co | American Amber / Red Ale | 6.1% |
| Mas | Cellador Ales | Saison | 6.0% |
| Màs Agave | Founders Brewing | Gose | |
| Mas Agave - Grapefruit | Founders Brewing | | |
| Mas Frambuesa | Casa Agria Specialty Ales | Saison | 6.4% |
| Mas Juteux | Monkish Brewing Co. | Saison | 8.5% |
| Mas Lenta | Jessup Farm Barrel House | Wild Ale | |
| Mas Verde | River Roost Brewery | American IPA | 6.7% |
| Masala Mama IPA | Minneapolis Town Hall Brewery | American IPA | 5.9% |
| Maschusch | Brekeriet | | |
| Mash | The Bruery | English Barleywine | 12.5% |
| Mash & Coconut | The Bruery | English Barleywine | 12.8% |