- Merrill
- Metolius
- Metzger
- Middle Grove
- Middleton
- Midland
- Midway
- Midway
- Mikkalo
- Miles Crossing
- Mill Camp
- Mill City
- Miller Island
- Miller Sands
- Millersburg
- Millican
- Millington
- Millwood
- Milo
- Milton-Freewater
- Milwaukie
- Milwaukie Heights
- Minaker Island
- Minam
- Minerva
- Minto Island
- Mishawaka
- Mission
- Mist
- Mist