- Meyer
- Mitchell
- Manley
- Maples Mill
- Marbletown
- Middlegrove
- Mink Island
- Miserable Island
- Monterey
- Macoupin Island
- McClay Orchard
- Mazonia
- McCall
- Middle Creek
- Mud Island
- Marley
- McClure
- McCormick
- Meadowbrook
- Medinah
- Menard
- Meppen
- Merna
- Michael
- Midland City
- Millburn
- Miller City
- Milmine
- Mitchell
- Mitchellsville