Mi
- Miami River - Florida
- Miami River - New York
- Miami River - Oregon
- Mianus River - Connecticut, New York
- Michigan River - Colorado
- Middle Branch Piscataquog River - New Hampshire
- Middle River - Iowa
- Middle River - Minnesota
- Middle River - Wisconsin
- Middle Fork River - West Virginia
- Middle Fork John Day River - Oregon
- Middle Fork Kentucky River - Kentucky
- Middle Fork Salmon River - Idaho
- Middle Fork South Platte River - California
- Middle Fork Vermilion River - Illinois
- Middle Fork Willamette River - Oregon
- Middle Island Creek - West Virginia
- Middle Santiam River - Oregon
- Miles River - Maryland
- Milk River - Montana
- Mill Creek - southern California
- Mill Creek - Tehama County, California
- Mill Creek - Ohio
- Mill Creek - West Virginia
- Mill River - Connecticut
- Mill River (Northampton, Massachusetts) - western Massachusetts
- Mill River (Massachusetts – Rhode Island) - Massachusetts, Rhode Island
- Mill River (Taunton River) - southeastern Massachusetts
- Millers River - New Hampshire, Massachusetts
- Millers River - Rhode Island
- Mills River - North Carolina
- Millstone River - New Jersey
- Milwaukee River - Wisconsin
- Mimbres River - New Mexico
- Minam River - Oregon
- Mineral River - Michigan
- Mink River - Wisconsin
- Minnehaha Creek - Minnesota
- Minnesota River - Minnesota
- Mishnock River - Rhode Island
- Mispillion River - Delaware
- Mission River - Texas
- Missisquoi River - Vermont
- Mississinewa River - Indiana
- Mississippi River - Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, Louisiana
- Missouri River - Montana, North Dakota, South Dakota, Nebraska, Iowa, Kansas, Missouri
- Mitchell River - Massachusetts
- Mitchell River - North Carolina
- Mitchigan River - Michigan
Read more about this topic: List Of Rivers Of The United States: M