M
- Anton Mach, Pilsen Brewery - WI 205
- Maier & Zobelein - CA 168
- Maier Brewing Co. - CA 168
- Jacob Mall Brewing Co. - OH 123
- Manhattan Consumers Brewing Co. - NY 476
- Manilla Anchor Brewing Co. - NY 242
- Marathon City Brewing Co. - WI 253
- Marshfield Brewing Co. - WI 255
- Frank Marx Brewing Co. - MI 285
- Marx Brewing Co. - MI 285
- Marx Brewing Co., Inc. - MI 285
- Massachusetts Breweries Co. - MA 3
- Mass. Breweries Co., Pfaff Brewery - MA 33
- Wm. Massolt Bottling Co. - MN BW
- Mathie Brewing Co. - CA 157
- Mathie-Ruder Brewing Co. - WI 521
- F.X. Matt Brewing Co. - NY 696
- Mattes Brewing Co. - NE 25
- Mauch Chunk Brewing Co. - PA 303
- David Mayer Brewing Co. - NY 453
- McAvoy Co. - IL 42
- McCormick Brewing Co. - MA27
- J. & A. McKechnie Brewing Co. - NY 223
- McSorley's Bar - NY Bar
- Meadville Brewing Co. - PA 312
- Mellet & Nichter Brewing Co. - PA 706
- Memphis Brewing & Malting Co. - TN 13
- Mendocino Brewing Co. - CA CRAFT
- Mendota Brewing Co. - IL 277
- Menominee River Brewing Co. - MI 216
- Metz Brewing Co. - NE 35
- Metz Bros. Brewing Co. - NE 35
- Jacob Metzger & Co. - IN BW
- Meyer Brewing Co. - IL 16
- Meyersdale Brewing Co. - PA 315
- Miami Valley Brewing Co. - OH 175
- Leonard Michel Brewing Co. - NY 132
- Michigan Brewery - MI 93
- Fred. Miller Brewing Co. - WI 287
- Miller Brewing Co. - WI 287
- Milstadt Brewing Co. - IL 279
- Milwaukee Brewing Co. of San Fran. - CA 295
- Minck Brewing Co. - IN 128
- Mineral Spring Brewing Co. - WI 352
- Minneapolis Brewing Co. - MN 108
- Mishicot Brewing Co. - WI 355
- Mission Brewing Co. - CA 286
- Missoula Brewing Co. - MT 48
- Harry Mitchell Brewing Co. - TX 28
- Mobile Brewing Co. - AL 8
- Moehn Brewing Co., Western Brewery - IA 24
- Moehn Brewing Co. - IA 31
- Christian Moerlein Brewing Co. - OH 76
- Moerschel Brewing Co. - MO 196
- Moerschel Spring Brewery - MO 74
- J.&A. Moeschlin, Cold Spring Brewery - PA 793
- Monarch Breweries - IL 107
- Monarch Brewing Co. - IL 107
- Monroe Brewing Co. - NY 600
- Montana Brewing Co. - MT 31
- Monumental Brewing Co. - MD 72
- Moore & Quinn, Inc. - NY 667
- Mount Carbon Brewery - PA 706
- Mount Carmel Brewery - PA 333
- Mount Hood Brewing Co. - OR 72
- Mt. Clemens Brewing Co. - MI 223
- Mt. Penn Brewing Co. - PA 728
- Geo. Muelbach Brewing Co. - MO 42
- Mueller Brewing Co. - WI 498
- Mueller Bros. Brewing Co. - WI 498
- F.J. Mumm Brewery, Inc. - NY 316
- Muskegon Brewing Co. - MI 224
- Mussel Brewing Co. - IN 137
- Mutual Union Brewing Co. - PA 1
