- McCook
- McCool Junction
- McCullough Island
- McDonalds Trailer Court
- McGrew
- McKeag
- McKissick Island
- McLean
- Mead
- Meadow
- Meadow Grove
- Meadows Trailer Court
- Meadville
- Meek
- Megeath
- Melbeta
- Melia
- Memphis
- Menominee
- Mercer
- Merchiston
- Merklin Trailer Court
- Merna
- Merriman
- Midland
- Midway
- Midway
- Midway Trailer Court
- Mignery Ranch
- Mikes Meadows