Missouri: The Only U.S. State Bordered by Two Navigable Rivers

Missouri holds a unique geographical distinction among U.S. states: it's the only one bordered by two major navigable rivers. The Mississippi River forms its entire eastern boundary, while the Missouri River runs along much of its western edge before cutting across the state to join the Mississippi near St. Louis.

Both rivers have been vital transportation corridors since before European settlement. The Mississippi connects the Midwest to the Gulf of Mexico, while the Missouri—North America's longest river—extends westward into the Great Plains and Rocky Mountain regions. Their confluence near St. Louis made that city a crucial gateway for westward expansion.

Today, both rivers remain commercially navigable, supporting barge traffic that moves grain, coal, petroleum products, and other bulk commodities. This dual-river access has historically given Missouri significant economic advantages in trade and transportation.