- McGlinn Island
- McGowan
- McIntosh
- McKay
- McKees Beach
- McKenna
- McKenna Heights Mobile Home Park
- McLoughlin
- McLoughlin Heights
- McMicken Heights
- McMicken Island
- McMillan Village Mobile Home Park
- McMillin
- McMurray
- McNeil Island
- McNeill Island
- McVan
- Mead
- Meadow Glade
- Meadow Ridge Mobile Home Park
- Meadowbrook Mobile Home Park
- Meadowdale
- Meadowdale
- Meadowdale Mobile Home Park
- Medical Lake
- Medina
- Medo Lynn Mobile Home Park
- Meeker
- Megler
- Melbourne