- 1 M. Chatten & Co.
- 1 M. Gilroy, Dealer in Wines and Liquors &c. (Firm)
- 1 M. Heminway & Sons Silk Co.
- 1 M. Kaufmann (Firm)
- 1 M. Marunaka (Kanazawa Kaga, Japan : Firm)
- 1 M. Mottl Sons
- 1 M. Odnovchevsky & Sons
- 1 M. Platt & Co. (woodworking, finishing)
- 1 M. Sarver (Firm)
- 2 M. Thams & Co.
- 1 M. Wihl & Co.
- 1 M. Zineman & Bro. Glasses & Spectacles (Firm)
- 1 M.D. Williamson (Firm)
- 1 M.E. McDowell & Co.
- 1 M.H. McCan (slaughterhouse, rendering)
- 1 M.J. Ware (Firm)
- 1 M?nasi?ha, King of Amer, 1550-1614
- 1 Maas Card Job Printing (Firm)
- 1 MacArthur, James
- 1 MacArthur, John, b. 1823
- 2 Macau
- 1 Macau Island
- 1 Macaulay, Thomas Babington Macaulay, Baron, 1800-1859
- 1 MacDonald, James Ramsay, 1866-1937
- 2 MacDonald, Katherine, 1881-1956
- 1 Macedonia
- 4 Maces (weapons)
- 2 MacGregor, John, 1825-1892
- 1 Machine guns
- 29 Machine shops
- 39 Machinery
- 141 Machinery Hall
- 11 Machinery industry
- 1 Machpelah Cemetery
- 7 Mack, E.
- 1 Mackay, Charles, 1814-1889
- 3 Mackellar, Smiths & Jordan
- 2 Mackinac, Michigan
- 50 Maclise, Daniel, 1806-1870
- 1 MacPherson, John, d. 1775
