- Mattawa
- Matthew
- Maud
- Maury
- Maury Island
- Maxwelton
- May Creek
- May Creek
- May Junction
- May Valley Manor Mobile Home Park
- Mayfield
- Maynard
- Maytown
- Mayview
- Maywood
- Mazama
- McAdam
- McCarteney
- McChord AFB
- McChord Air Force Base
- McCleary
- McCleary Junction
- McConnell Island
- McCormick
- McCoy
- McCredie
- McCurry Heights Mobile Home Park
- McDaniels Mobile Village
- McDonald
- McGilvara