- Marshall
- Marshfield
- Marshfield
- Marshtown
- Martin
- Martin Heights
- Martinsburg
- Martinsville
- Marysville
- Marysville
- Massacre
- Masthead
- Matamoras
- Matthews
- Mattix Corner
- Mauckport
- Maumee
- Mauzy
- Max
- Maxinkuckee
- Maxville
- Maxville
- Maxwell
- Maxwell
- Mayfield
- Mayflower Meadows
- Maynard
- Mays
- Maysville
- Maysville Crossing