questionedithistorytranslationsCurrent version This is the accepted version. added by Shankar Kumar May 2, 2013, 12:43 p.m. What is the longest river in the United States? MississippiMissouriYukonRio GrandeThe Missouri River is the longest river in North America. Having 2,341 mi (3,768 km), it is longer than the Mississippi (2,202 mi 3,544 km). When combined with the lower Mississippi River, it forms the world's third longest river system, after the Nile and Amazon.Shankar KumarShare and bring new players to the game!0Very uninterestingToo difficultPoorly writtenIncorrect or questionableCorrect this question5Very interesting!reach: rather globalgeographygeography of North Americageography of the United StatesNorth Americariversrivers of North AmericaUnited StatesVotes +5 Very interesting! globalquiz.org