- Marlton, New Jersey
- Mars Hill, North Carolina
- Marshall, Indiana
- Marshall, Texas
- Martha's Vineyard, Massachusetts
- Martin, Tennessee
- Martinsburg, West Virginia
- Martinsville, Virginia
- Maryland Heights, Missouri
- Maryville, Tennessee
- Mashpee, Massachusetts
- Mason City, Iowa
- Mason, Ohio
- Mathews, North Dakota
- Matthews, North Carolina
- Mattoon, Illinois
- Maui, Hawaii
- Maumee, Ohio
- Maumelle, Arkansas
- Mayfield, Kentucky
- Maysville, Kentucky
- McAllen, Texas
- McCalla, Alabama
- McComb, Mississippi
- McCook, Illinois
- McDonough, Georgia
- McGregor, Texas
- McKenzie, Tennessee
- McKinney, Texas
- McLean, Virginia
- Medford, Massachusetts
- Medina, Tennessee
- Melbourne, Florida
- Memphis, Tennessee
- Menlo Park, California
- Menomonie, Wisconsin
- Mentone, Alabama
- Meridian, Idaho
- Merrillville, Indiana
- Mesa, Arizona
