- Anton Mach, Pilsen Brewery
- Maier & Zobelein
- Maier Brewing Co.
- Jacob Mall Brewing Co.
- Manhattan Consumers Brewing Co.
- Manilla Anchor Brewing Co.
- Marathon City Brewing Co.
- Marshfield Brewing Co.
- Frank Marx Brewing Co.
- Marx Brewing Co.
- Marx Brewing Co., Inc.
- Massachusetts Breweries Co.
- Mass. Breweries Co., Pfaff Brewery
- Wm. Massolt Bottling Co.
- Mathie Brewing Co.
- Mathie-Ruder Brewing Co.
- F.X. Matt Brewing Co.
- Mattes Brewing Co.
- Mauch Chunk Brewing Co.
- David Mayer Brewing Co.
- McAvoy Co.
- McCormick Brewing Co.
- J. & A. McKechnie Brewing Co.
- McSorley's Old Ale House
- Meadville Brewing Co.
- Mellet & Nichter Brewing Co.
- Memphis Brewing & Malting Co.
- Mendocino Brewing Co.
- Mendota Brewing Co.
- Menominee River Brewing Co.
- Metz Brewing Co.
- Metz Bros. Brewing Co.
- Jacob Metzger & Co.
- Meyer Brewing Co.
- Meyersdale Brewing Co.
- Miami Valley Brewing Co.
- C. & J. Michel Brewing Co.
- Leonard Michel Brewing Co.
- Michigan Brewery
- Fred. Miller Brewing Co.
- Miller Brewing Co.
- Milstadt Brewing Co.
- Milwaukee Brewing Co. of San Francisco
- Minck Brewing Co.
- Mineral Spring Brewing Co.
- Minneapolis Brewing Co.
- Mishicot Brewing Co.
- Mission Brewing Co.
- Missoula Brewing Co.
- Harry Mitchell Brewing Co.
- Mobile Brewing Co.
- Moehn Brewing Co., Western Brewery
- Moehn Brewing Co.
- Christian Moerlein Brewing Co.
- Moerschel Brewing Co.
- Moerschel Spring Brewery
- J.&A. Moeschlin, Cold Spring Brewery
- Monarch Breweries
- Monarch Brewing Co.
- Monroe Brewing Co.
- Montana Brewing Co.
- Monumental Brewing Co.
- Moore & Quinn, Inc.
- Mount Carbon Brewery
- Mount Carmel Brewery
- Mount Hood Brewing Co.
- Mount Clemens Brewing Co.
- Mt. Clemens Brewing Co.
- Mt. Penn Brewing Co.
- George Muehlebach Brewing Co.
- Geo. Muehlebach Brewing Co.
- Geo. Muehlebach, Main St. Brewery
- Mueller Brewing Co.
- Mueller Bros. Brewing Co.
- Muessel Brewing Co.
- F.J. Mumm Brewery, Inc.
- Muskegon Brewing Co.
- Mutual Union Brewing Co.
M
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