Where is the Missouri River?

The Missouri River is primarily located in the central United States. It is the longest river in North America, stretching approximately 2,341 miles (3,766 kilometers) from its source in southwestern Montana to its confluence with the Mississippi River near St. Louis, Missouri. The Missouri River flows through or borders seven states: Montana, North Dakota, South Dakota, Nebraska, Iowa, Kansas, and Missouri. It is a significant waterway and serves as a vital transportation route, a source of water for agriculture and human consumption, and a habitat for various plant and animal species.