Ohio cities starting with M
- Macedonia, OH 12
- Madison, OH 17
- Magnolia, OH 5
- Maineville, OH 11
- Malta, OH 6
- Malvern, OH 6
- Manchester, OH 8
- Mansfield, OH 112
- Mantua, OH 6
- Maple Heights, OH 12
- Marblehead, OH 8
- Marengo, OH 11
- Maria Stein, OH 5
- Marietta, OH 46
- Marion, OH 75
- Marshallville, OH 5
- Martins Ferry, OH 17
- Marysville, OH 52
- Mason, OH 29
- Massillon, OH 69
- Maumee, OH 18
- McArthur, OH 6
- Mc Arthur, OH 5
- McComb, OH 6
- McConnelsville, OH 14
- Mechanicsburg, OH 10
- Medina, OH 51
- Mendon, OH 6
- Mentor, OH 42
- Miamisburg, OH 28
- Middleburg Heights, OH 16
- Middlefield, OH 7
- Middleport, OH 12
- Middletown, OH 58
- Milan, OH 8
- Milford, OH 38
- Millersburg, OH 20
- Mineral City, OH 7
- Minerva, OH 16
- Minford, OH 9
- Mingo Junction, OH 10
- Mogadore, OH 8
- Monclova, OH 7
- Monroe, OH 10
- Monroeville, OH 6
- Montgomery, OH 6
- Montpelier, OH 14
- Moraine, OH 7
- Morrow, OH 11
- Mount Gilead, OH 20
- Mount Vernon, OH 50