States Affected by the Mississippi and Missouri Rivers

The two rivers directly border or traverse the following states:

Mississippi River (10 states)

• Minnesota (source)
• Wisconsin
• Iowa
• Illinois
• Missouri
• Kentucky
• Tennessee
• Arkansas
• Mississippi
• Louisiana (mouth)

Missouri River (7 states)

• Montana (source)
• North Dakota
• South Dakota
• Nebraska
• Kansas
• Iowa
• Missouri (confluence)

Combined Unique States: 15

(All above except Iowa and Missouri appear on both lists.) The Mississippi Basin covers parts of 31 US states and 2 Canadian provinces; the Missouri Basin covers 10 states and 1 province.