Missouri River

The Missouri River is a tributary of the Mississippi River in the United States. At about 2,565 mi (4,130 km) in length, it is the longest river in the United States and drains approximately one-sixth of the North American continent. The combined Missouri-Mississippi river system is the fourth longest river in the world.

Tributaries

Montana

• Jefferson River
• Madison River
• Gallatin River
• Sixteenmile Creek
• Dearborn River
• Smith River
• Sun River
• Belt Creek
• Marias River
• Arrow Creek
• Judith River
• Cow Creek
• Musselshell River
• Milk River
• Redwater River
• Poplar River
• Big Muddy Creek

North Dakota

• Yellowstone River
• Little Muddy Creek
• Tobacco Garden Creek
• Little Missouri River
• Knife River
• Heart River
• Cannonball River

South Dakota

• Grand River
• Moreau River
• Cheyenne River
• Bad River
• White River
• James River
• Vermillion River
• Big Sioux River (Iowa border)

Nebraska, Iowa, Kansas, Missouri

• Niobrara River (Nebraska)
• Platte River (Nebraska)
• Little Sioux River (Iowa)
• Kansas River (Kansas)
• Blue River (Missouri)
• Osage River (Missouri)