Towns
| State | City/Town | Town Title |
|---|---|---|
| Ohio | Mcdonald | Mcdonald, OH |
| Ohio | Mcgaw | Mcgaw, OH |
| Ohio | Mechanicsburg | Mechanicsburg, OH |
| Ohio | Mechanicstown | Mechanicstown, OH |
| Ohio | Medina | Medina, OH |
| Ohio | Medway | Medway, OH |
| Ohio | Melmore | Melmore, OH |
| Ohio | Melrose | Melrose, OH |
| Ohio | Mendon | Mendon, OH |
| Ohio | Mentor | Mentor, OH |
| Ohio | Mesopotamia | Mesopotamia, OH |
| Ohio | Metamora | Metamora, OH |
| Ohio | Miamisburg | Miamisburg, OH |
| Ohio | Miamitown | Miamitown, OH |
| Ohio | Miamiville | Miamiville, OH |
| Ohio | Middle Bass | Middle Bass, OH |
| Ohio | Middle Point | Middle Point, OH |
| Ohio | Middlebranch | Middlebranch, OH |
| Ohio | Middleburg | Middleburg, OH |
| Ohio | Middlefield | Middlefield, OH |
| Ohio | Middleport | Middleport, OH |
| Ohio | Middletown | Middletown, OH |
| Ohio | Midland | Midland, OH |
| Ohio | Midvale | Midvale, OH |
| Ohio | Milan | Milan, OH |