- Mosenthein Island
- Matanzas
- Matanzas Beach
- Matanzas Island
- Margaret Fuller Island
- Maryland
- Myrtle
- Massac City
- Mermet
- Midway
- Maxwell
- Monica
- Matthews
- Mannon
- Mapes Island
- Marston
- Millersburg
- Madonnaville
- Meissner Island
- Merrimac
- Millstadt Junction
- Mitchie
- Monroe City
- Mackville
- Martinsburg
- Maysville
- Montezuma
- Munger