- Marietta (Ga.)1
- Martinique1
- Massachusetts, United States3
- McBeth Elementary School, Union, Union County, South Carolina, United States1
- Mediterranean Sea2
- Meigs County, Portland, Ohio, United States1
- Memphis, Shelby County, Tennessee, United States1
- Mexico1
- Michigan, United States1
- Midlands22
- Milledgeville, Baldwin County, Georgia, United States1
- Mississippi Drainage8
- Mississippi, United States4
- Mohawk River, New York, United States1
- Mokelumne River, California, United States2
- Montréal (Québec)1
- Mount Rushmore National Memorial (S.D.)1
- New England8
- New Jersey, United States1
- New York (N.Y.)4