- Myrtle Island
- Modesto
- Mount Hood
- McKee Bridge
- McLeod
- Mountain View
- Marks Island
- Malone
- Miller Island
- Mabel
- Maple Island (historical)
- Marshall Island
- Mill Camp
- Minerva
- Mohawk
- McCaffrey Island
- Marion Forks
- Morgan Island
- McPhersons Island
- Morton Island
- Macleay
- McKee
- McLain Island
- Middle Grove
- Minto Island
- Monitor
- Morgan
- Maplewood
- McGuire Island
- Multnomah