Place
- Madawaska1
- Madison1
- Maine1
- Marble Falls1
- Marylandia usque ad Ludoviciam1
- McKays Creek, near Cedarville1
- McKenzie R., Thunder Bay, Ont.1
- Meldrum Point, Manitoulin Island1
- Menominee1
- Michoacán1
- Minnesota1
- Missinaibi River, Gardiner Tp.1
- Missouri1
- Morley1
- Mt. Washington1
- Nebraska1
- New Hampshire1
- New Jersey1
- Newaygo1
- Newfane1