- Manhasset, Nassau County, New York, United States3
- Marion Street, Columbia, S.C.3
- Martinique3
- Mediterranean3
- Mediterranean Sea3
- Middlebrook, Somerset County, New Jersey, United States3
- Midway Island3
- Mill Way (S.C.)3
- Milledgeville, Baldwin County, Georgia, United States3
- Millvile, Spartanburg County, South Carolina, United States3
- Milwaukee, Milwaukee County, Wisconsin, United States3
- Montreal3
- Mount Vernon, Westchester County, New York, United States3
- Mount Zion (S.C.)3
- Mt. Lowe, Los Angeles County, California, United States3
- Muscaonge (Muskallonge) Lake, Oxbow, Theresa Township, Jefferson County, New York, United States3
- Naha (Okinawa)3
- Nahant, Essex County, Massachusetts, United States3
- Nara (Japan)3
- Natchez, Adams County, Mississippi, United States3