What is the longest river in the U.S?

Question

Actually, you guys are all wrong. The Missouri River is longer than the mississipi. One poster said that the Missouri is a tributary to the Mississippi, but in reality, the Mississipi is a tributary to the Missouri, because the tributary is always the shorter river.

Answer 1

Mississippi river:

http://en.wikipedia.org/wiki/Mississippi

Better information:

http://pubs.usgs.gov/of/1987/ofr87-242/

Answer 2

The Missouri River starts in Montana and covers  2,540 miles before flowing into the Mississippi River, the second longest river in the United States.

"The Missouri River is a tributary of the Mississippi River and the longest river in the United States." - Wikipedia

The 10 longest rivers in the United Sates are:

Missouri: 2,540 miles

Mississippi: 2,340 miles

Yukon: 1,980 miles

Rio Grande: 1,900 miles

St. Lawrence: 1,900 miles

Arkansas: 1,460 miles

Colorado: 1,450 miles

Atchafalaya: 1,420 miles

Ohio: 1,310 miles

Red: 1,290 miles

Answer 3

the mississippi (missouri) river is the longest river in the United States, it's 3902 miles long.

Answer 4

Mississippi river