- Merredin
- Merrinjie
- Metricup
- Metzke Find
- Middle Creek
- Middle Island
- Miling
- Millendon
- Mills Lake
- Milo
- Milpara
- Minara
- Mindarra
- Mindy
- Mingenew
- Minigin
- Minnenooka
- Minniging
- Minnivale
- Misquito Hills
- Mistaken Islet
- Mitchell Plateau
- Mobrup
- Mocardy
- Mogumber
- Mollerin
- Monjebup
- Monjingup
- Monkey Mia
- Montgomery Islands