You’ll Ace This United States Geography Quiz If You’ve Visited All 50 States
The United States has many rivers. Which is the longest?

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With a length of 2,341 miles, The Missouri River is the longest river in the United States, with The Mississippi River coming in second with a length of 2,340 miles.
Joe Sohm/Visions of America/Universal Images Group via Getty Images
Joe Sohm/Visions of America/Universal Images Group via Getty Images
The United States has many rivers. Which is the longest?
- The Missouri River
- The Colorado River
- The Red River
- The Mississippi River
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