- Minnesota Arrowhead Association1
- Minnesota Forestry Association1
- Minnesota Game & Fish Protective League1
- Minnesota Highway Improvement Association.1
- Minnesota School of Mines Experiment Station1
- Minnesota State Fair1
- Minnesota Tax Commission (1907-1939)1
- Minnesota Tourist and Publicity Bureau1
- Minnesota Transfer Board of Trade1
- Minnesota--New Ulm1
- Miser, Hugh D. (Hugh Dinsmore), 1884-19691
- Mississippi Geological, Economic, and Topographical Survey1
- Mitchell Jr., Samuel Augustus1
- Mitchell, S. Augustus, Jr. (Samuel Augustus)1
- Moeller, David A1
- Moffat, John, active 1795-18201
- Mohun, Edward1
- Molitor, E.1
- Montanus, Arnoldus, 1625?-16831
- Montgomerie, Thomas George, 1830-1878.1