- Mackville
- Madeline Island
- Madge
- Madison
- Madison Mobile Home Park
- Madsen
- Maggies Island
- Magnolia
- Maiden Rock
- Maine
- Majestic Island
- Mallwood
- Malone
- Malvern
- Manawa
- Manchester
- Manitou Island
- Manitowish
- Manitowish Waters
- Manitowoc
- Manitowoc Rapids
- Mann
- Maple
- Maple Aire Mobile Village
- Maple Beach
- Maple Bluff
- Maple Bluff Estates
- Maple Grove
- Maple Grove
- Maple Heights