Question: what is the biggest river in the usa
Answer: Longest main - stem rivers of the United States # Name Mouth Length Source coordinates Mouth coordinates Watershed area Discharge States , provinces , and image Missouri River Mississippi River 7003234100000000000 ♠ 2,341 mi 3,768 km 45 ° 55 ′ 39 '' N 111 ° 30 ′ 29 '' W ﻿ / ﻿ 45.