- Mabel
- Mack Arch
- Macksburg
- Macleay
- Madras
- Malin
- Malone
- Manhattan Beach
- Manning
- Manzanita
- Maple Island (historical)
- Mapleton
- Maplewood
- Marcola
- Marial
- Marion
- Marion Forks
- Marks Island
- Marlene Village
- Marmot
- Marquam
- Marsh Island
- Marsh Island Light
- Marshall Island
- Marshland
- Marylhurst
- Maupin
- Maxville
- Mayger
- Mayville